apacs+™ satellite control module (scm)

Siemens Energy & Automation, Inc. Installation and Service Instruction

SD39SCM-1 Rev: 3 March 2005

APACS+™

Satellite Control Module (SCM)

Trademarks ProcessSuite, QUADLOG, 4-mation, and APACS+ are trademarks of Siemens Energy & Automation, Inc.

Other names in this publication might be trademarks, the use of which by third parties for their own purposes may violate the rights of the registered holder.

Copyright Siemens Energy & Automation, Inc. 2005 All rights reserved

The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent or registration of a utility model or design, are reserved. Siemens Energy & Automation, Inc. 1201 Sumneytown Pike P.O. Box 900 Spring House, PA 19477-0900

Disclaimer of Liability We have checked the contents of this manual for agreement with the hardware and software described. Since deviations cannot be precluded entirely, we cannot guarantee full agreement. However, the data in this manual is reviewed regularly and any necessary corrections included in subsequent editions. Suggestions for improvement are welcomed. ©Siemens Energy & Automation, Inc. 2005 Technical data subject to change.

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Table of Contents

Section Title Page

1 Introduction....................................................................................................................1-1 1.1 Product Description ......................................................................................................1-1 1.1.1 Soft-Fuse Feature ...................................................................................................1-2 1.1.2 Diagnostics.............................................................................................................1-2 1.1.3 LED Indicators.......................................................................................................1-5 1.1.4 Configuration .........................................................................................................1-5 1.1.5 Terminations ..........................................................................................................1-5 1.2 Product Support ............................................................................................................1-6 1.3 Related Literature .........................................................................................................1-7

2 Installation......................................................................................................................2-1 2.1 Hardware Identification................................................................................................2-1 2.1.1 Termination Strip and Marshalled Termination Assembly Identification .............2-2 2.2 I/O Wiring Considerations............................................................................................2-2 2.2.1 Local Termination Hook-Up I/O Wiring ...............................................................2-3 2.2.1.1 Discrete Input Channels ...............................................................................2-3 2.2.1.2 Discrete Output Channels.............................................................................2-3 2.2.1.3 Local Termination Discrete I/O Power Supply ............................................2-3 2.2.1.4 Analog Channels ..........................................................................................2-5 2.2.2 Marshalled Termination Interconnect I/O Cable ...................................................2-5 2.2.2.1 Discrete Input Channels ...............................................................................2-5 2.2.2.2 Discrete Output Channels.............................................................................2-5 2.2.2.3 Marshalled Termination Discrete I/O Power Supply ...................................2-6 2.2.2.4 Analog Channels ..........................................................................................2-6 2.3 Installation Preparation.................................................................................................2-7 2.4 Environmental Considerations .....................................................................................2-8 2.5 Equipment Delivery and Handling .............................................................................2-11 2.5.1 Predelivery Test ...................................................................................................2-11 2.5.2 Factory Shipment .................................................................................................2-11 2.5.3 Receipt of Shipment.............................................................................................2-11 2.5.4 Equipment Handling ............................................................................................2-11 2.5.5 Equipment Storage...............................................................................................2-12 2.6 SCM Termination Strip Installation ...........................................................................2-12 2.7 SCM Marshalled Termination Assembly and I/O Cable Installation.........................2-13 2.7.1 Marshalled Termination Assembly Installation to DIN Rail ...............................2-14 2.7.2 Optional (Flat Surface) Marshalled Termination Assembly Installation .............2-16 2.7.3 Interconnect I/O Cable Installation ......................................................................2-17 2.8 SCM Installation.........................................................................................................2-19 2.8.1 Module Rack Mechanical Keying........................................................................2-19 2.8.2 Module Installation ..............................................................................................2-21 2.9 Electrical Installation..................................................................................................2-21 2.9.1 Serial Port Cables.................................................................................................2-22 2.9.2 Marshalled Termination Assembly Discrete I/O Power Fuse..............................2-23 2.9.3 User-Supplied Discrete I/O Power Supply Connections......................................2-25

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2.9.4 Discrete and Analog Signal Connections.............................................................2-27 2.9.5 Unterminated I/O Cable Assembly Connections .................................................2-31 2.9.6 Terminal Block Connections................................................................................2-32 2.9.7 Protective Conductor Terminal ............................................................................2-33 2.9.8 RAM Battery........................................................................................................2-33 2.9.9 Security Switch Setting........................................................................................2-34 2.9.10 Downloading a Configuration..............................................................................2-34

3 Maintenance ...................................................................................................................3-1 3.1 Tool and Equipment Requirements ..............................................................................3-1 3.2 Preventive Maintenance ...............................................................................................3-1 3.2.1 Visual Inspection....................................................................................................3-1 3.2.2 Cleaning .................................................................................................................3-2 3.3 Troubleshooting............................................................................................................3-2 3.3.1 Bezel LEDs ............................................................................................................3-4 3.3.2 Diagnostic Port.......................................................................................................3-4 3.4 SCM Removal/Replacement ........................................................................................3-5 3.4.1 Removal .................................................................................................................3-5 3.4.2 Replacement...........................................................................................................3-5 3.5 SCM Termination Strip Removal/Replacement ...........................................................3-6 3.5.1 Removal .................................................................................................................3-6 3.5.2 Replacement...........................................................................................................3-6 3.6 SCM Marshalled Termination Assembly Removal/Replacement................................3-7 3.6.1 Removal .................................................................................................................3-7 3.7 Interconnect I/O Cable Removal/Replacement ............................................................3-7 3.7.1 Removal .................................................................................................................3-7 3.7.2 Replacement...........................................................................................................3-8 3.8 RAM Battery Replacement ..........................................................................................3-8 3.9 Spare and Replacement Parts........................................................................................3-9 3.10 Return of Equipment within North America ..............................................................3-10 3.11 Return of Equipment Outside of North America........................................................3-10 3.12 Maintenance Records .................................................................................................3-11

4 Circuit Description ........................................................................................................4-1 4.1 Processor/Communication Section...............................................................................4-1 4.1.1 Processor ................................................................................................................4-1 4.1.2 IOBUS....................................................................................................................4-1 4.1.3 SPIBUS ..................................................................................................................4-1 4.1.4 Serial Ports .............................................................................................................4-2 4.1.5 Diagnostic Port.......................................................................................................4-2 4.2 Discrete I/O Section......................................................................................................4-2 4.2.1 Processor ................................................................................................................4-2 4.2.2 External Power.......................................................................................................4-2 4.2.3 Output Channel ......................................................................................................4-2 4.2.4 Conventional Input.................................................................................................4-3 4.3 Analog I/O Section .......................................................................................................4-3 4.3.1 Processor ................................................................................................................4-3 4.3.2 Analog Output Channel .........................................................................................4-3 4.3.2.1 Voltage Output .............................................................................................4-3

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4.3.2.2 Current Output..............................................................................................4-3 4.3.3 Analog Input Channel ............................................................................................4-4 4.3.3.1 Voltage Input................................................................................................4-4 4.3.3.2 Current Input ................................................................................................4-4

5 Model Designation .........................................................................................................5-1 5.1 Accessories ...................................................................................................................5-1 5.2 Options .........................................................................................................................5-2

6 Specifications..................................................................................................................6-1 6.1 Module Specifications ..................................................................................................6-1 6.2 Agency Approvals ........................................................................................................6-2

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List of Tables

Table Title Page

1–1 Technical Support Center Contact Information ...............................................................1-7

2–1 Discrete Output Channel Cable Length ...........................................................................2-6 2–2 Discrete Power Supply Cable Length ..............................................................................2-6 2–3 SCM Serial Ports 1 and 2 Terminal Assignments..........................................................2-22 2–4 Receptacle Wire Sizes ...................................................................................................2-27 2–5 SCM Marshalled Termination Assembly Terminal Identification ................................2-28 2–6 SCM Local Termination Strip Terminal Identification .................................................2-30 2–7 Unterminated I/O Cable Assembly Wire Ident..............................................................2-31

3–1 Status LED Indications ....................................................................................................3-4

5–1 SCM Accessories .............................................................................................................5-1 5–2 SCM Options ...................................................................................................................5-2

6–1 SCM Specifications .........................................................................................................6-1

List of Illustrations

Figure Title Page

1–1 Satellite Control Module and Associated Hardware........................................................1-3 1–2 SCM Basic I/O Wiring ....................................................................................................1-4

2–1 Marshalling Utility Panel...............................................................................................2-10 2–2 SCM Termination Strip and Interconnect I/O Cable Mounting ....................................2-13 2–3 SCM Marshalled Termination Assembly ......................................................................2-15 2–4 Marshalled Termination Assembly, Mounting and Removal ........................................2-15 2–5 SCM Marshalled Termination Assembly, Mounting Ear Installation ...........................2-16 2–6 Interconnect I/O Cable Assembly and Cable Keying ....................................................2-18 2–7 Module Keying Assignment and Installation.................................................................2-20 2–8 Serial Ports 1 and 2 Terminal Block ..............................................................................2-23 2–9 SCM Marshalled Termination Assembly Fuse Location...............................................2-24 2–10 Local SCM Termination Strip I/O Connection Examples .............................................2-26 2–11 Marshalled Termination Assembly I/O Connection Examples .....................................2-27 2–12 Using a Pin-type Crimp-on Connector ..........................................................................2-32 2–13 Security Switch and RAM Battery Locations................................................................2-35

5–1 Model Designation...........................................................................................................5-1

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Significant Changes for Revision 3

Section Description

Preface (Conventions and Symbols)— new section

1.2 Product Support—contact information updated.

2.2 I/O Wiring Considerations—DANGER warning added

3 Maintenance—DANGER warning added

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PREFACE

Conventions and Symbols

The following symbols may appear in this manual and may be applied to the equipment. The reader should become familiar with the symbols and their meaning. Symbols are provided to quickly alert the user to safety related situations, issues, and text.

Symbol Meaning

DANGER

Indicates an immediate hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, may result in property damage.

NOTICE

Indicates a potential situation which, if not avoided, may result in an undesirable result or state.

Important Identifies an action that should be taken to avoid an undesirable result or state. Note Identifies additional information that should be read.

Electrical shock hazard. The included Warning text states that the danger of electrical shock is present.

Electrical shock hazard. Indicated that the danger of electrical shock is present.

Explosion hazard. Indicates that the danger of an explosion hazard exists.

Electrostatic discharge. The presence of this symbol indicates that electrostatic discharge can damage the electronic assembly.

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Qualified Persons

The described equipment should be installed, configured, operated, and serviced only by qualified persons thoroughly familiar with this publication. The current version, in Portable Document Format (PDF), is available at http://sitescape.sea.siemens.com/.

For the purpose of this publication and product labels, a qualified person is one who is familiar with the installation, construction, and operation of the equipment, and the involved hazards. In addition, he or she has the following qualifications:

• Is trained and authorized to energize, de-energize, clear, ground and tag circuits and equipment in accordance with established safety practices.

• Is trained in the proper care and use of protective equipment such as rubber gloves, hard hat, safety glasses or face shields, flash clothing, etc., in accordance with established safety practices.

• Is trained in rendering first aid.

Scope

This publication does not purport to cover all details or variations in equipment, nor to provide for every possible contingency to be met in connection with installation, operation, or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, the matter should be referred to one of the support groups listed in the Product Support section of this manual.

The contents of this manual shall not become part of or modify any prior or existing agreement, commitment or relationship. The sales contract contains the entire obligation of Siemens. The warranty contained in the contract between the parties is the sole warranty of Siemens. Any statements continued herein do not create new warranties or modify the existing warranty.

General Warnings and Cautions

WARNING

This equipment contains hazardous voltages, and it has been certified for use in the hazardous locations specified on the product nameplate and in the Model Designation and Specifications section. Death, serious personal injury, or property damage can result if safety instructions are not followed. Only qualified personnel should work on or around this equipment after becoming thoroughly familiar with all warning, safety notices, and maintenance procedures contained herein. The successful and safe operation of this equipment is dependent upon proper handling, installation, operation, and maintenance.

The perfect and safe operation of the equipment is conditional upon proper transport, proper storage, installation and assembly, as well as, on careful operation and commissioning.

The equipment may be used only for the purposes specified in this publication.

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viii March 2005

CAUTION

Electrostatic discharge can damage or cause the failure of semiconductor devices such as integrated circuits and transistors. The symbol at right may appear on a circuit board or other electronic assembly to indicate that special handling precautions are needed.

• A properly grounded conductive wrist strap must be worn whenever an electronics module or circuit board is handled or touched. A service kit with a wrist strap and static dissipative mat is available from Siemens (PN15545-110). Equivalent kits are available from both mail order and local electronic supply companies.

• Electronic assemblies must be stored in anti-static protective bags when not installed in equipment.

SD39SCM-1 Introduction

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1 Introduction

This Instruction provides installation and service information for the following Satellite Control Module (SCM) hardware:

• Model 39SCMNNNAAN Satelite Control Module P/N 16258-51 • SCM Termination Strip P/N 16274-31 • SCM Marshalled Termination Assembly P/N 16291-31

This Instruction is divided into six major sections.

• Section 1, Introduction—Contains a product description, product support information, and lists of related literature.

• Section 2, Installation—Describes environmental considerations and mechanical and electrical installation.

• Section 3, Maintenance—Consists of preventive maintenance, troubleshooting, and assembly replacement procedures, and spare and replacement parts suggestions.

• Section 4, Circuit Description—Contains a brief system level description of the SCM.

• Section 5, Model Designation—Provides the model designation and tables of accessories and options.

• Section 6, Specifications—Consists of mechanical, electrical, and environmental specifications.

1.1 Product Description

The Satellite Control Module (SCM), shown in Figure 1-1, is a member of the Satellite Control Series (SCS) comprising the Satellite Control Module (SCM) and the Satellite Discrete Input (SDI) modules, which are members of the APACS+ process control system’s family of modules. The SCM is an intelligent (microprocessor-based), configurable, high performance control module with onboard analog and discrete I/O that can communicate with an Advanced Control Module (ACM) via its IOBUS. In addition, the SCM can perform control functions for a subsystem within a larger APACS+ system or act as a stand-alone control module within a small APACS+ system. The SDI is controlled by the SCM, providing additional AC or DC discrete input channels. Figure 1-2 illustrates basic I/O wiring to termination assemblies.

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The SCM

• minimizes hardware costs with 24 software-configurable channels (16 discrete and 8 analog).

• responds at a rate of 10 msec input to output for regulating control and discrete logic applications.

• includes a Soft-Fuse™ feature to protect individual discrete output channels against short circuit and overload conditions caused by field wiring problems.

• improves accuracy by performing floating point calculations in actual engineering units.

• enables faster response to field problems by providing advanced diagnostics which identify potential causes and recommended actions.

• facilitates efficient and intuitive control strategy design by allowing three standard configuration languages to be mixed within a single module.

• facilitates easier field check-out by allowing the LEDs to indicate statuses without requiring a configuration.

• reduces servicing time by allowing the module to be inserted or removed while powered without disturbing field wiring.

• isolates field faults by electrically isolating all I/O channels from the backplane and ground.

1.1.1 Soft-Fuse Feature

The Soft-Fuse feature protects the SCM’s discrete channels against over-current conditions caused by field wiring and field device problems. Each channel contains an over-current detection circuit that switches the output off before damage can occur. Diagnostics report the “blown” fuse channel and permit clearing the blown fuse from an operator interface. The Soft-Fuse feature provides equivalent protection to individual hard fuses, permits remote on-line “repair,” and eliminates the need for stocking spare fuses.

1.1.2 Diagnostics

The SCM is designed to provide years of trouble-free service. However, in the event of unexpected operation, the SCM is equipped with extensive diagnostics to detect the situation and facilitate a quick resolution. The goals of these diagnostics are to

• notify the appropriate personnel of a module malfunction or wiring error and

• perform automatic shutdown of a channel or a module if a dangerous fault is detected (for fail safe operation).


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There are two types of SCM diagnostics: those that cover individual channels and those that cover the module as a whole. Each SCM discrete channel can detect the following faults:

• Input channel failed • Output channel failed ON • Output channel failed OFF • Output channel tripped fuse

Each SCM analog channel can detect the following faults:

• Input channel wiring open • Input channel wiring shorted • Output channel failed ON • Output channel failed OFF

Figure 1–1 Satellite Control Module and Associated Hardware


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Figure 1–2 SCM Basic I/O Wiring

The diagnostics for overall module performance are too numerous to list in their entirety but can be categorized as follows:

• Power supply diagnostics • Over/under temperature diagnostics • Memory diagnostics • Communication diagnostics • Watchdog reset diagnostics • Miscellaneous diagnostics

The SCM is notified and will act on problems detected within itself or by its I/O modules. It also performs diagnostic routines that verify the integrity of crucial circuitry. The SCM maintains a log of current and historical errors for it and the SDI that can be reviewed using the Diagnostic Logger Utility or the ProcessSuite™ 4-mation™ configuration software. In addition, errors are indicated by the module’s LED indicators.


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1.1.3 LED Indicators

The SCM’s LEDs support local troubleshooting without an operator interface. The SCM includes two LEDs that indicate the following module statuses:

• Module OK • Channel(s) faulted • Module faulted • Module unconfigured • IOBUS communication failed • Module failed • Module active • Module inactive

1.1.4 Configuration

Like all APACS+ modules, the SCM is software-configured using the 4-mation software. The configuration is loaded and stored in the control module’s non-volatile memory. This approach to configuration allows the module to be removed and replaced on-line without the need for reconfiguration.

During configuration, 4-mation is used to assign a type to each channel (input or output). In addition, for some channels, an additional parameter can be defined. This parameter is:

Channel Diagnostics - The channel’s diagnostics, such as Read Back, can be enabled or disabled.

1.1.5 Terminations

The SCM’s field I/O can be terminated locally or remotely according to user needs and preferences. Local terminations reside directly below the SCM. Marshalled Termination Assemblies or Rail Termination Assemblies provide for terminations up to 100 feet (30.5 m) away from the SCM. Figure 1-2 is an example of the wiring used for these options.


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1.2 Product Support

Product support can be obtained from a Technical Support Center (TSC). Each regional TSC is a customer service center that provides direct telephone support on technical issues related to the functionality, application, and integration of all products supplied by Siemens. Regional TSC contact information is provided in Table 1–1. Your regional TSC is the first place you should call when seeking product support information. When calling, it is helpful to have the following information ready:

• Caller name and company name

• Product part number or model number and version

• If there is a problem with product operation: - Whether the problem is intermittent - The steps performed before the problem occurred - Any error messages or LED indications displayed - Installation environment

Product documentation is now located in the Library forum of the Process Automation User Connection at: http://sitescape.sea.siemens.com/. The Process Automation User Connection is a secure site. Registration is open to all verified users of Siemens process automation systems. If you are not already, and would like to become a member, please visit our Process Automation User Connection web page at: http://www.sea.siemens.com/process/support/papauc.html

Contained within the Process Automation User Connection is the APACS+/QUADLOG Secure Site at: http://sitescape.sea.siemens.com/forum/aca-1/dispatch.cgi/f.apacsquadlo forum. This site is only open to customers with an active service agreement. It contains all service manuals, service memos, service notes, configuration manuals, etc. for the APACS+ and QUADLOG family of products. If you are experiencing technical difficulties with the site, please contact SiteScape technical support at: toll free 1-877-234-1122 (US) or 1-513-336-1474.


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Table 1–1 Technical Support Center Contact Information

Hours of Operation: 8 a.m. to 5 p.m. eastern time Monday – Friday (except holidays)

Telephone: +1 800 333 7421

E-mail: [email protected]

Fax: +1 215 283 6343

In-house Repair Service:

+1 215 646-7400 ext. 4762

USA

Secure Web Site: www.sea.siemens.com/process/product/papao.html

Global

Please check the global Siemens Automation and Drives support page:

http://www4.ad.siemens.de

1.3 Related Literature

The following literature should be available when performing the SCM installation.

• MODULRAC Installation and Service Instruction (SD39MODULRAC-1) • SIXRAC Installation and Service Instruction (SD39SIXRAC-1) • UNIRAC Installation and Service Instruction (SD39UNIRAC-1) • MODULPAC 1000 Installation and Service Instruction (SD39MODULPAC-1) • MODULPAC 2000 Installation and Service Instruction (SD39MODULPAC-2) • Power Supply Rack (POWERAC) Installation and Service Instruction (SD39PSR-1) • Power Distribution Assembly (PDA) Installation and Service Instruction (SD39PDA-1) • APACS+ Grounding Practices (SD39GND-1) • Using 4-mation Version 4.10 or Higher with the Satellite Control Module (CG39SCM-1)

SD39SCM-1 Installation

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2 Installation

This section describes the following:

• Determining the maximum length of field I/O wiring

• Installation of the Satellite Control Module (SCM) and associated hardware

• Connection of field wiring

Review and complete the steps in section 2.2 and 2.3 before proceeding with the SCM installation.

IMPORTANT

The SCM installation should be in accordance with the National Electrical Code (NEC) and other applicable construction and electrical codes.

The Satellite Control Module shall not be used in any manner except as specified by Siemens.

2.1 Hardware Identification

The Satellite Control Module is identified by the letters “SCM” on the bezel and by two nameplate labels: a large label, shown below, located on the tracking plate (left side of SCM in Figure 1-1), and a small label inside the bezel battery compartment. Access to the battery compartment is by loosening a captive screw in the hinged compartment cover. Both labels contain the module’s Model Designation, Part Number, ROM Version, and Serial Number. The larger label also shows the current and voltage requirements of the module.

MODEL 39SCMxxxxxN POWER 24 VDC P/N 16258-51/xx 0.4 A MAX ROM VERSION x.xx I/O SIGNAL 24 VDC S/N xxxxxxxx

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2.1.1 Termination Strip and Marshalled Termination Assembly Identification

The SCM Termination Strip is identified by information silkscreened on the component side of the board.

SCM SATELLITE CONTROL

MODULE MOORE PRODUCTS CO.

TERMINATION STRIP PN 16274-31

The SCM Marshalled Termination Assembly is identified by information silkscreened on the component side of the board.

SCM SATELLITE CONTROL

MODULE MOORE PRODUCTS CO.

MARSHALLED TERMINATION ASSEMBLY PN 16291-31

2.2 I/O Wiring Considerations

Figure 1-2 shows typical local and marshalled I/O wiring. I/O connections between field devices and either local or marshalled terminations are wired with user-supplied cable. This cabling is referred to as “hook-up” I/O wire.

DANGER

Electrical shock hazard Explosion hazard

Will cause death, serious injury or property damage

• Remove power from all wires and terminals and verify that there

are no hazardous voltages before working on equipment. • In potentially hazardous atmosphere, remove power from

equipment before connecting or disconnecting power, signal, or other circuit, or extracting/inserting module.

• Observe all pertinent regulations regarding installation in hazardous area.

• Ensure all devices are rated for hazardous (classified) locations.


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When marshalled termination is employed, an Interconnect I/O Cable Assembly connects the SCM Marshalled Termination Assembly to the SCM in the MODULRAC, SIXRAC, or UNIRAC. Interconnect I/O Cable Assembly standard lengths and part numbers are listed in section 5.

An Interconnect I/O Cable length must be determined before proceeding with the installation of hardware.

2.2.1 Local Termination Hook-Up I/O Wiring

Subsections 2.2.1.1 to 2.2.1.4 provide guidelines for determining the allowable length of hook-up I/O wiring.

2.2.1.1 Discrete Input Channels

I/O Wire Length - 3750 m (12300 ft.) maximum combined lengths of Channel (+) and Return (-) #18AWG hook-up I/O wires.

2.2.1.2 Discrete Output Channels

I/O Wire Length - The maximum combined lengths of Channel (+) and Return (-) #18AWG hook-up I/O wires can be determined from Equation 1.

0.875V Equation 1: L(ft.) = -----------------------------------

Iload(0.0071Ω/ft.)

Where:

0.875V = Allowable voltage drop in hook-up I/O wires

L(ft.) = Maximum allowable combined feeder and return hook-up wire length

0.0071Ω/ft. = Ohmic value per foot of #18AWG hook-up wire

Iload = Current draw in amperes of the field device. Refer to the literature provided by the device’s manufacturer.

2.2.1.3 Local Termination Discrete I/O Power Supply

Wire Length - The maximum combined lengths of Power (+) and Return (-) #18AWG hook-up I/O wires can be determined from Equation 2.

0.875V Equation 2: L(ft.) = -----------------------------------

Iload(0.0071Ω/ft.)

Where:


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0.875V = Allowable voltage drop in feeder and return power supply wires

L(ft.) = Maximum allowable feeder and return hook-up wire length

0.0071Ω/ft. = Ohmic value per foot of #18AWG hook-up wire

Itotalload = Summation of load currents of all configured Discrete Output and Analog channels.


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2.2.1.4 Analog Channels

The analog section is designed for a total compliance of 20V. The following are assumed:

• A 12V compliance for the transducer • A 347 ohm intrinsic safety barrier • A maximum current of 20 mA • A maximum allowable feeder and return hook-up wire resistance of 53 ohms

The above assumptions yield:

I/O Wire Length - 2275 m (7465 ft.) maximum combined lengths of Channel (+) and Return (-) #18AWG hook-up I/O wires.

2.2.2 Marshalled Termination Interconnect I/O Cable

When marshalled termination is employed, the output channel voltage delivered to a field device and the length of the Interconnect I/O Cable and hook-up I/O wiring must be determined. These maximum cable lengths are dependent upon which of the SCM’s discrete channels are configured as inputs or outputs. The following subsections are applicable to each SCM and its Marshalled Termination Assembly.

CAUTION

The DC+ terminals adjacent to the I/O terminals on the Marshalled Termination Assembly are NOT connected directly to the external power supply DC+ power terminal. All such DC+ terminals are common and connect to a single 300 mA fuse. The input to the fuse connects to the DC+ power terminal and protects field wiring in the event of a short circuit. The maximum combined load from the channel DC+ terminals should not exceed 300 mA.

2.2.2.1 Discrete Input Channels

The current through the Interconnect I/O cable is negligible; therefore, the values in section 2.2.1.1 are applicable.

2.2.2.2 Discrete Output Channels

The maximum hook-up cable lengths listed in Table 2-1 apply for a 600 mA load and a voltage of 21.6V at the field device using a 24V power supply.


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Table 2–1 Discrete Output Channel Cable Length

INTERCONNECT I/O CABLE LENGTH COMBINED LENGTHS OF CHANNEL(+)

AND RETURN (-) #18AWG HOOK-UP WIRE 3 Meters (10 feet) 56.5 m (185 ft.) maximum 8 Meters (26.2 feet) 47 m (155 ft.) maximum 15 Meters (49.2 feet) 32 m (105 ft.) maximum 30 Meters (98.4 feet) 1.6 m (5 ft.) maximum

2.2.2.3 Marshalled Termination Discrete I/O Power Supply

The maximum hook-up cable lengths listed in Table 2-2 apply for a 9.6A total load and a voltage of 21.6V at the field device using a 24V power supply.

Table 2–2 Discrete Power Supply Cable Length

INTERCONNECT I/O CABLE LENGTH COMBINED LENGTHS AND SIZE OF

CHANNEL (+) AND RETURN (-) HOOK-UP WIRE

3 m (9.8 ft.) 7.2 m (24 ft.) # 14 AWG maximum 8 m (26.2 ft.) 2.8 m (9.0 ft.) #14 AWG maximum 15 m (49.2 ft.) See Note 1. 3 m (9.8 ft.) #10 AWG 30 m (98.4 ft.) See Note 2. 1.5 m (4.9 ft. ) #10 AWG

Notes:

1. 15m Interconnect I/O Cable - The total current for all discrete channels should not exceed 7.4A.

2. 30m Interconnect I/O Cable - The total current for all discrete channels should not exceed 3.7A.

2.2.2.4 Analog Channels

Using the criteria established in section 2.2.1.4 and compensating for the 2.82 ohm resistance of a 30 m (98.4 ft.) Interconnect I/O cable yields:

I/O Wire Length - 2155 m (7070 ft.) maximum combined lengths of Channel (+) and Return (-) #18AWG hook-up I/O wires attached to the Marshalled Termination Assembly.


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2.3 Installation Preparation

1. Install SIXRACs, UNIRACs, or MODULRACs with Local Termination Panels (for local termination only) in MODULPACs or cabinets where the SCMs are to be installed. The SCMs should not be installed in their racks at this time; however, the rack slot numbers for the SCMs should be known.

Note that in determining a rack slot for an SCM:

• Only Satellite Series client modules installed in slots to the right of an SCM (higher slot numbers) are slaved to that SCM.

• No slots can be between an SCM and any of its slave I/O modules.

• Use of multiple SCMs is supported only in MODULRACs identified by part number/rev number 16114-171/05 or higher. A MODULRAC with revision number 04 and lower will support only one SCM. SIXRACs do not have such a restriction.

2. Determine maximum length of I/O wiring. According to the guidelines in section 2.2.

3. If local I/O termination is employed, tag all I/O cables and route them into the cabinet. They should be ready for cable end preparation and connection to the SCM Termination Strip.

4. If remote termination is employed, tag all I/O cables and route them into the marshalling cabinet. Cables should be ready for preparation and connection to the SCM Marshalled Termination Assemblies.

Also, route the Interconnect I/O Cable Assembly (or Unterminated I/O cable) between the marshalling cabinet and the cabinet containing the rack. Refer to Figure 1-1; J1 will be installed in the rack and P2 will connect to the SCM Marshalled Termination Assembly in the marshalling cabinet.

5 Select the needed termination assembly:

• Local I/O termination—SCM Termination Strip • Marshalled (remote) termination—SCM Marshalled Termination Assembly

IMPORTANT

Termination assemblies shall be accessible to maintenance personnel only; therefore, termination assemblies are to be mounted in enclosures requiring a key or special tool to gain access.

6. It is recommended that a P/N 16114-65 Power Distribution Assembly (PDA), or other user-supplied similar device, be used to provide power disconnection and additional fusing to the I/O power supply and/or module rack operating power source. The PDA should be located in the same enclosure as the I/O power supply and/or module rack power source.


2-8 March 2005

7. A P/N 16114-105 PSR4A (POWERAC rack-mounted power supply) or other user-supplied I/O power supply is required for all SCM applications. This supply powers the user’s field I/O devices and SCM channel circuitry, and is sized by the user. The user-supplied power supply should have appropriate safety ratings. Refer to the Power Supply Rack (POWERAC) Installation and Service Instruction (SD39PSR-1) for installation details.

8. Fabricate the AC power cable that connects the I/O Power Supply to a Power Distribution Assembly (PDA). The AC power input cable connecting the PDA to the local breaker box (power mains) is also user-fabricated. Refer to the Power Distribution Assembly (PDA) Installation and Service Instruction (SD39PDA-1) for details.

9. If the module rack (MODULRAC, SIXRAC, or UNIRAC in which the SCM is installed) is to receive operating power from a POWERAC or other user-supplied power supply , it is recommended that the power supply be mounted in the same enclosure as the SCM. Alternatively, an enclosure housing the power supplies can be attached to, or sit next to, the enclosure that houses the SCM. This ensures a short power cable run to the module rack.

10. When marshalled I/O termination is employed, both SDM Marshalled Termination Assemblies and I/O power supplies can be mounted to the same Utility Panel. Typically, four SCM Marshalled Termination Assemblies and two I/O power supplies can be mounted on a Utility Panel.

11. When local I/O termination is employed, both the SCM Termination Strip and POWERAC can be mounted in a MODULPAC enclosure, provided that only one MODULRAC and Local Termination Panel are installed.

12. User-supplied I/O power supplies can be mounted to a Utility Panel (P/N 16114-12) and housed in a separate MODULPAC or user-supplied cabinet. The enclosure housing the power supplies should be attached to, or sit next to, the enclosure that houses the SCM Termination Strips or SCM Marshalled Termination Assemblies. This ensures a short power cable run to the termination assemblies. Utility Panel dimensions are provided in Figure 2-1. Design the power supply mounting layout and drill and tap all mounting holes.

2.4 Environmental Considerations

• Many industrial environments create severe operating conditions. The conditions at each SCM location must be within the specifications stated in section 6.0.

CAUTION

Exceeding the specified operating temperature limits can adversely affect performance and may cause damage. Air temperature should be periodically checked to ensure that this specification is not being exceeded.


March 2005 2-9

• To ensure reliable data communications, it would be prudent to locate APACS+ modules (enclosures) away from sources of interference, such as high current electrical equipment, which emit strong electromagnetic fields and switching transients.

• Industrial environments often contain particulate, liquid, and gaseous contaminants. Particulate matter, usually dust and dirt, is abrasive and can cause intermittent contact in connectors associated with circuit assemblies. A layer of dust on circuit boards will interfere with semiconductor heat dissipation. Liquid and gaseous contaminants can have a corrosive effect on metal, rubber, plastic and circuit board components. Extended exposure to this environment may result in equipment malfunction.

• To reduce contaminant related equipment malfunctions:

1. Identify contaminants and implement methods to reduce their presence.

2. When cleaning equipment and surrounding area, especially the floor, either vacuum away all dust and dirt or use a dampened rag or mop.

3. Clean or replace all air conditioning filters, room air filters, and equipment filters regularly.

4. Inform personnel with access to APACS+ modules of the need for site cleanliness.


2-10 March 2005

Figure 2–1 Marshalling Utility Panel


March 2005 2-11

2.5 Equipment Delivery and Handling

The following subsections provide information of interest to shipping, receiving, and warehouse personnel.

2.5.1 Predelivery Test

An SCM is fully tested and inspected to ensure proper operation. If the SCM is ordered factory installed in an enclosure, the SCM is tested as part of the APACS system.

2.5.2 Factory Shipment

SCMs to be installed by the user are placed in static shielding bags and packaged for shipment. Accessories are packaged separately. If the SCM is ordered factory installed in an enclosure, the enclosure is bolted to a pallet and wrapped for protection during shipment.

2.5.3 Receipt of Shipment

All cartons should be inspected at the time of their delivery for possible external damage. Any visible damage should be immediately recorded on the carrier’s copy of the delivery slip.

Each carton should be carefully unpacked and its contents checked against the enclosed packing list. At the same time, each item should be inspected for hidden damage that may have been accompanied by exterior carton damage. If it is found that some items have been damaged or are missing, refer to section 2.5.4 or 2.5.5 and notify Siemens immediately, providing full details. In addition, damages must be reported to the carrier with a request for their on-site inspection of the damaged item and its shipping carton.

2.5.4 Equipment Handling

The SCM is completely enclosed and may be safely handled without undertaking special ESD (electrostatic discharge) handling procedures provided the battery compartment door is closed and secured. DO NOT touch the connector pins on the back of the module. Handle the module carefully and do not subject it to excessive shock or vibration.

CAUTION

A grounded wrist strap must be used to provide ESD protection whenever the battery compartment door is opened to access the backup battery or Security Enable switch.


2-12 March 2005

2.5.5 Equipment Storage

The storage temperature and humidity parameters of section 6.0 must be met for storage of an SCM.

When the SCM is not powered as in storage, the backup battery must be disabled. An SCM removed from storage for use must be prepared as described in section 2.9.8.

IMPORTANT

Prior to applying power to the SCM, enable the backup battery.

2.6 SCM Termination Strip Installation

When local I/O termination is to be employed, an SCM Termination Strip must be installed at the rack slot location of each SCM mounted in a module rack (MODULRAC or SIXRAC). A Local Termination Panel must also be installed. Refer to Figure 2-2 and the following mounting instructions:

1. Consult user’s documentation and note the slot locations assigned to each SCM in a module rack.

IMPORTANT

Use of multiple SCMs is supported only in MODULRACs identified by part number/rev number 16114-171/05 or higher. A MODULRAC with a revision number 04 and lower can support only one SCM. SIXRACs do not have such a restriction.

2. Note the following on the module rack or an SCM Termination Strip:

• On the module rack, locate and identify the extruded spacer to which the lower edge of the backplane is mounted. Note that the bottom of the extruded spacer is grooved. The top edge of an SCM Termination Strip will rest in this groove.

• Identify ten alignment pins located below the module rack frame that span the width of the module rack panel. One of these pins will engage a hole located on the termination strip above the “Moore” logo. The left-most pin corresponds to module rack slot #1.

• The SCM Termination Strip’s captive mounting screws can be seen projecting from the bottom of the plastic extrusion panel.


March 2005 2-13

3. Mount each SCM Termination Strip at its assigned location as follows:

1) At the SCM slot, angle the top edge of the strip toward the backplane’s extruded spacer and insert the tip of the strip in the spacer’s groove.

2) Slide the strip in the groove until it is vertically and horizontally aligned with the appropriate pin.

3) Carefully lower the strip and engage the pin with the extrusion and board pin mounting hole. Firmly push down to seat the strip on the pin. When the strip is properly seated, the pin will be flush with, or project slightly above, the top surface of the strip.

4) Tighten the strip’s captive mounting screws, which are automatically aligned with their respective panel mounting holes.

Figure 2–2 SCM Termination Strip and Interconnect I/O Cable Mounting

2.7 SCM Marshalled Termination Assembly and I/O Cable Installation

The following subsections describe installing the SCM Marshalled Termination Assembly to either a DIN rail or a flat surface, and installing and connecting the Interconnect I/O Cable Assembly.


2-14 March 2005

2.7.1 Marshalled Termination Assembly Installation to DIN Rail

The SCM Marshalled Termination Assembly (MTA), shown in Figure 2-3, snaps onto a user-supplied DIN rail. The suggested types of DIN rails are:

• Preferred: Top hat profile EN 50 022-35 mm X 7.5 mm or EN 50 022-35 mm X 15 mm • Alternate: G-profile EN 50 035-G 32 mm

Refer to the following to install an MTA to a blank Utility Panel, a Marshalling Utility Panel, or a user-fabricated panel.

1. For a blank Utility Panel or a user-fabricated panel, mount user-supplied DIN Rails and wire duct to the Panel.

1) Determine the mounting layout of MTAs and wire duct. Refer to the Utility Panel dimensions in Figure 2-1 and MTA dimensions in Figure 2-3.

NOTE

MTA dimensions can vary with type. Refer to the Installation and Service Instruction for each I/O type to be installed.

2) Drill and tap DIN rail mounting holes in the Utility Panel.

3) Remove all burrs and metal debris and clean the panel before proceeding.

2. Mount the Marshalling Utility Panel, blank Utility Panel or user-fabricated panel in a MODULPAC marshalling cabinet or user-supplied cabinet. Refer to MODULPAC 1000 and 2000 Installation and Service Instructions (SD39MODULPAC-1 and SD39MODULPAC-2) for installation of the blank Utility Panel or Marshalling Utility Panel.

3. Retrieve the MTA to be mounted, including a supplied bag of SCM labels and a Cable Keying Kit (P/N 16056-435). Temporarily set aside the Cable Keying Kit.

1) Consult user documentation and note the rack address number (1 to 16) and slot number (1 to 10) assigned to the SCM.

2) Retrieve an SCM label and record the rack and slot numbers on the label (see Figure 1-1). Save the remaining labels for use in section 2.7.3.

4. Refer to Figure 1-1 and attach the SCM label adjacent to connector J1 (also shown in Figure 2-3).

5. Ensure that J1 and J2 are factory keyed according to the pattern shown in Figure 2-3.

6. Refer to Figure 2-4 to mount the SCM Marshalled Termination Assembly to a DIN rail.


March 2005 2-15

Figure 2–3 SCM Marshalled Termination Assembly

Figure 2–4 Marshalled Termination Assembly, Mounting and Removal


2-16 March 2005

2.7.2 Optional (Flat Surface) Marshalled Termination Assembly Installation

The removal of the DIN rail mounting feet from the Marshalled Termination Assembly (MTA), in conjunction with the installation of four Mounting Ears (accessory item), permits the MTA to be flat mounted to a panel. Four P/N 16056-562 (single piece) Mounting Ears are required per MTA (see Table 5-2).

Refer to Figure 2-5 and the following installation procedure:

1. At one end of the MTA, remove the three end cap securing screws from the card holder end cap. Remove and set aside the end cap.

2. Slide the DIN rail mounting feet from the grooves in the bottom of the MTA card holder. Discard the mounting feet. Re-install the just removed end cap.

3. Retrieve four Mounting Ears and insert them in the appropriate mounting holes provided in the end caps as illustrated in Figure 2-5.

4. Use the MTA as a template to mark the location of the mounting ear holes on the surface of the panel. Typical mounting screw size is M4, or users can select another size. After drilling or punching the holes, the holes should be threaded. Refer to Figure 2-3 for MTA dimensions.

Figure 2–5 SCM Marshalled Termination Assembly, Mounting Ear Installation


March 2005 2-17

2.7.3 Interconnect I/O Cable Installation

An Interconnect I/O Cable is shown in Figure 2-6. It is used to connect an SCM to an SCM Marshalled Termination Assembly (MTA) when remote I/O termination is employed. The cable-to-module connector (J1) is installed at the MODULRAC, SIXRAC, or UNIRAC slot location of an SCM.

It is assumed that as part of the site preparation procedure all tagged Interconnect I/O Cables have been routed and pulled into their respective cabinets and are ready for connection. MTAs should already be installed in the marshalling cabinet (see section 2.7.1) and be ready for cable connection.

An Unterminated I/O Cable is installed similarly at the rack; however, terminations in the marshalling cabinet are user-supplied.

The following procedure is applicable to MODULRACs and SIXRACs. To install an Interconnect I/O Cable to a UNIRAC, refer to the UNIRAC Installation and Service Instruction (SD39UNIRAC-1).

Refer to Figures 2-2 and 2-6 and perform the following:

1. Note the following on the cable’s molded J1 connector:

• The bottom face of the molded connector has a “pin mounting hole” located above a captive mounting screw. This hole engages one of the MODULRAC or SIXRAC panel’s alignment pins.

• The top edge of the molded J1 connector will rest in the groove of the backplane’s extruded spacer

2. Consult user’s documentation and note the MODULNET node address (if applicable), rack address number (1 to 16) and slot number (1 to 10) assigned to the SCM. The molded J1 connector will be mounted at this slot.

IMPORTANT


3. Install the molded J1 connector at its assigned location as follows:

1) Angle the top edge of the molded connector toward the backplane’s extruded spacer and insert its tip in the spacer’s groove.

2) Slide the connector in the groove until it is vertically and horizontally aligned with the appropriate pin (slot #).

3) Carefully lower the molded connector and engage the alignment pin with the connector’s pin mounting hole. Firmly push down to seat the connector on the pin. When the connector is properly seated, the pin will be flush with or project slightly above the connector’s face.


2-18 March 2005

4) Tighten the connector’s captive mounting screw, which is automatically aligned with its respective panel mounting hole.

5) Get two labels from the bag of SCM labels. Record on each label the appropriate numbers noted in the above step 2 (see Figure 1-1). Attach one label to the molded J1 connector (see Figure 1-1). At the molded P2 connector end of the cable, attach the second label.

4. Key cable connector P2.

1) Get the P/N 16056-435 Cable Keying Kit set aside in step 3 of section 2.7.1. The kit contains keying pins and an Instruction.

2) Refer to Figure 2-6 for the assigned keying pattern and install the pins in accordance with the supplied Instruction.

5. Connect the opposite end of the I/O Cable Assembly to its respective I/O termination assembly. Perform one of the following depending upon I/O Cable type.

• Interconnect I/O Cable Assembly (P2 installed)

Connect cable connector P2 (Figure 2-5) to the A (J1) connector on the Marshalled Termination Assembly (Figure 1-1). A keying pin projecting from the face of P2 ensures a correct mating. Press P2 firmly onto J1 and torque the securing screw on P2’s connector shell to 50 inch-pounds max.

• Unterminated I/O Interconnect Cable Assembly (P2 not installed)

Refer to section 2.9.5 for color code identification and function of each unterminated wire. Refer to user wiring diagrams to make the proper cable connections to the termination assembly.

Figure 2–6 Interconnect I/O Cable Assembly and Cable Keying


March 2005 2-19

2.8 SCM Installation

Modules are shipped individually packaged in protective, sealed, static shielding bags. Refer to section 2.5.5 for module handling considerations.

Each MODULRAC, SIXRAC, or UNIRAC slot and each module should be keyed to prevent accidental installation of a module into an incompatible slot, which may impair system performance or damage equipment or wiring. Keying is highly recommended; see Figure 2-6.

• Modules are keyed at the factory. The keying pattern is unique to each module type [e.g. Critical Control Module (CCM) ]. See Figure 2-7 for the SCM keying pattern.

• A factory-assembled MODULRAC or SIXRAC is keyed at the factory. A user-assembled MODULRAC or SIXRAC is keyed by the user according to the module type assigned to each slot. This keying pattern complements the module’s keying pattern. Stop plugs are supplied with the MODULRAC and, SIXRAC.

• When adding a module to a rack, be sure to key the rack slot.

Section 2.8.1 describes keying an unkeyed module and keying a rack slot. Section 2.8.2 describes installing the module in the rack.

2.8.1 Module Rack Mechanical Keying

Perform the following to key the appropriate rack (MODULRAC, SIXRAC, or UNIRAC).

1. Get the Keying Kit supplied with the module rack.

2. Refer to Figure 2-7 and note the rack keying pattern. Also, locate the rack’s top and bottom rails.

3. Press the stop plugs into the holes identified by the solid dots.


2-20 March 2005

Figure 2–7 Module Keying Assignment and Installation


March 2005 2-21

2.8.2 Module Installation

Refer to Figure 2-7 and the following installation instructions:

1. Refer to user’s documentation for correct module slot number and location of the SCM Transition Strip or I/O Cable Assembly.

IMPORTANT


2. Remove the SCM from its static shielding bag and ensure that the module is keyed. Also, check the rack slot to be sure it is keyed. Refer to section 2.8.1 to install keying.

3. Insert the module in the assigned rack slot. Use uniform pressure to firmly seat the module in the backplane and transition board connectors. If the module does not seat, check the keying. A properly seated module will have the rear of its bezel flush against the rack’s front rails. A keyed module that is not matched to a slot will not engage the backplane or transition board connectors or seat flush against the rack’s front rails.

4. Pull open the bezel’s pivoting top and bottom handles to expose the slotted captive mounting screws and secure the module to the top and bottom rails. Close the bezel’s handles when finished.

CAUTION

Do not use the captive mounting screws to seat the module. Damage to the bezel can result.

2.9 Electrical Installation

This section describes power supply and field I/O connections to an SCM Termination Strip or SCM Marshalled Termination Assembly. It is assumed that tagged field I/O wires have been pulled into the cabinet and are ready for preparation and connection. Connection of the SCM’s RAM battery and setting of the security switch are also covered.


2-22 March 2005

2.9.1 Serial Port Cables

Serial Ports 1 and 2 are RS-232 industrial serial communication ports with a software selected communications rate of 300 to 38,400 baud. They provide an interface to the SCM for serial applications and are located on the front bezel of the SCM (See Figure 1-1). The serial ports terminal block is a plug-in type block and can be removed from the front of the SCM to facilitate wiring. Serial port cables are fabricated by the user.

The serial port terminal block receptacles accept wire sizes from #14 AWG to #22 AWG.

Table 2-3 lists serial port terminal descriptions and Figure 2-8 illustrates the terminal block.

Table 2–3 SCM Serial Ports 1 and 2 Terminal Assignments

TERMINAL NUMBER

DESCRIPTION DIRECTION

1 (Port 1) Transmitted Data (TD) Output

2 (Port 1) Received Data (RD) Input

3 (Port 1) Request To Send (RTS) Output

4 (Port 1) Clear To Send (CTS) Input

5 (Port 1) Data Terminal Ready (DTR)

6 (Port 1) Data Carrier Detect (DCD) Input

7 (Port 1) Signal Ground (Common Return)

8 (Port 2) Transmitted Data (TD) Output

9 (Port 2) Received Data (RD Input

10 (Port 2) Request To Send (RTS) Output

11 (Port 2) Clear To Send (CTS) Input

12 (Port 2) Signal Ground (Common Return)


March 2005 2-23

Figure 2–8 Serial Ports 1 and 2 Terminal Block

2.9.2 Marshalled Termination Assembly Discrete I/O Power Fuse

As shown in Figure 2-8, the SCM Marshalled Termination Assembly contains a field replaceable fuse (“DISCRETE INPUT POWER FUSE”) whose purpose is to protect I/O wiring in the event of a short circuit. A green LED (“FUSE OK WHEN LIT”) indicates the status of the fuse.

Figure 2-9 illustrates that the DC+ terminals adjacent to the I/O terminals on the SCM Marshalled Termination Assembly are NOT connected directly to the external power supply DC+ terminal block. All such DC+ terminals are common and connected to a single 300 mA fuse. The fuse is in series with the output of the DC+ power terminal block and protects field wiring in the event of a short circuit. The fuse part number and specification is listed below.

Siemens P/N 7447-211- 300 mA, 20 mm 250VAC slowblo cartridge type

CAUTION

The maximum combined load from the channel DC+ terminals should not exceed 300 mA.


2-24 March 2005

Figure 2–9 SCM Marshalled Termination Assembly Fuse Location


March 2005 2-25

2.9.3 User-Supplied Discrete I/O Power Supply Connections

Refer to Figures 2-10 and 2-11 for examples of discrete I/O power supply wiring and the following:

• Refer to section 2.2.1.3 for the allowable length of cable when local termination is used.

• Refer to section 2.2.2.3 for the allowable length of cable when marshalled termination is used.

• The DC+ and COM wire receptacles located on the SCM Termination Strip accept wire sizes from #22 AWG to #14 AWG.

• The DC+ and COM wire receptacles located on the SCM Marshalled Termination Assembly accept wire sizes from #22 AWG to #10 AWG.

The recommended wire size is #18 AWG stranded. The power supply cable is user-fabricated.


2-26 March 2005

Figure 2–10 Local SCM Termination Strip I/O Connection Examples


March 2005 2-27

Figure 2–11 Marshalled Termination Assembly I/O Connection Examples

2.9.4 Discrete and Analog Signal Connections

Figures 2-10 and 2-11 show examples of discrete signal and analog wiring for several channel types. Table 2-4 provides allowable terminal receptacle wire sizes. Table 2-5 provides SCM Marshalled Termination Assembly terminal identification. Table 2-6 provides SCM Termination Strip terminal identification.

For each channel, refer to user’s Process and Instrumentation Drawings and prepare the cable ends of the DC cabling for connection to the termination device, to the I/O Power Supply’s DC+ and Common terminals, and to the field device.

Table 2–4 Receptacle Wire Sizes

TERMINATION WIRE SIZE STRIP LENGTH Local SCM Termination Strip

22 to 14 AWG stranded or solid single conductor per terminal. Max. wire size of two conductors per terminal = 16 AWG.

0.31 inch (8 mm)

SCM Marshalled Termination Assembly

22 to 10 AWG stranded or solid single conductor per terminal. Max. wire size of two conductors per terminal = 12 AWG.

0.31 inch (8 mm)


2-28 March 2005

Table 2–5 SCM Marshalled Termination Assembly Terminal Identification

CHANNEL

TYPE TERMINAL

NUMBER TERMINAL

IDENTIFICATIONCHANNEL

TYPE TERMINAL

NUMBER TERMINAL

IDENTIFICATION Discrete 1 DC + CH 1 Analog 49 IOUT CH 17 Discrete 2 I/O CH 1 Analog 50 IIN CH 17 Discrete 3 COM CH 1 Analog 51 VIN CH 17 Discrete 4 DC + CH 2 Analog 52 COM CH 17 Discrete 5 I/O CH 2 Analog 53 SHLD CH 17 Discrete 6 COM CH 2 Analog 54 IOUT CH 18 Discrete 7 DC + CH 3 Analog 55 IIN CH 18 Discrete 8 I/O CH 3 Analog 56 VIN CH 18 Discrete 9 COM CH 3 Analog 57 COM CH 18 Discrete 10 DC + CH 4 Analog 58 SHLD CH 18 Discrete 11 I/O CH 4 Analog 59 IOUT CH 19 Discrete 12 COM CH 4 Analog 60 IIN CH 19 Discrete 13 DC + CH 5 Analog 61 VIN CH 19 Discrete 14 I/O CH 5 Analog 62 COM CH 19 Discrete 15 COM CH 5 Analog 63 SHLD CH 19 Discrete 16 DC + CH 6 Analog 64 IOUT CH 20 Discrete 17 I/O CH 6 Analog 65 IIN CH 20 Discrete 18 COM CH 6 Analog 66 VIN CH 20 Discrete 19 DC + CH 7 Analog 67 COM CH 20 Discrete 20 I/O CH 7 Analog 68 SHLD CH 20 Discrete 21 COM CH 7 Analog 69 IOUT CH 21 Discrete 22 DC + CH 8 Analog 70 IIN CH 21 Discrete 23 I/O CH 8 Analog 71 VIN CH 21 Discrete 24 COM CH 8 Analog 72 COM CH 21 Discrete 25 DC + CH 9 Analog 73 SHLD CH 21 Discrete 26 I/O CH 9 Analog 74 IOUT CH 22 Discrete 27 COM CH 9 Analog 75 IIN CH 22 Discrete 28 DC + CH 10 Analog 76 VIN CH 22 Discrete 29 I/O CH 10 Analog 77 COM CH 22 Discrete 30 COM CH 10 Analog 78 SHLD CH 22 Discrete 31 DC + CH 11 Analog 79 IOUT CH 23 Discrete 32 I/O CH 11 Analog 80 IIN CH 23 Discrete 33 COM CH 11 Analog 81 VIN CH 23


March 2005 2-29

CHANNEL TYPE

TERMINAL NUMBER

TERMINAL IDENTIFICATION

CHANNELTYPE

TERMINAL NUMBER


Discrete 34 DC + CH 12 Analog 82 COM CH 23 Discrete 35 I/O CH 12 Analog 83 SHLD CH 23 Discrete 36 COM CH 12 Analog 84 IOUT CH 24 Discrete 37 DC + CH 13 Analog 85 IIN CH 24 Discrete 38 I/O CH 13 Analog 86 VIN CH 24 Discrete 39 COM CH 13 Analog 87 COM CH 24 Discrete 40 DC + CH 14 Analog 88 SHLD CH 24 Discrete 41 I/O CH 14 Discrete 42 COM CH 14 Discrete 43 DC + CH 15 Discrete 44 I/O CH 15 Discrete 45 COM CH 15 Discrete 46 DC + CH 16 Discrete 47 I/O CH 16 Discrete 48 COM CH 16


2-30 March 2005

Table 2–6 SCM Local Termination Strip Terminal Identification

CHANNEL TYPE

TERMINAL NUMBER


CHANNEL TYPE

TERMINAL NUMBER


Discrete 1 I/O CH 1 Analog 30 IIN CH 20 Discrete 2 I/O CH 2 Analog 31 VIN CH 20 Discrete 3 I/O CH 3 Analog 32 COM CH 20 Discrete 4 I/O CH 4 Analog 33 IOUT CH 21 Discrete 5 I/O CH 5 Analog 34 IIN CH 21 Discrete 6 I/O CH 6 Analog 35 VIN CH 21 Discrete 7 I/O CH 7 Analog 36 COM CH 21 Discrete 8 I/O CH 8 Analog 37 IOUT CH 22 Discrete 9 I/O CH 9 Analog 38 IIN CH 22 Discrete 10 I/O CH 10 Analog 39 VIN CH 22 Discrete 11 I/O CH 11 Analog 40 COM CH 22 Discrete 12 I/O CH 12 Analog 41 IOUT CH 23 Discrete 13 I/O CH 13 Analog 42 IIN CH 23 Discrete 14 I/O CH 14 Analog 43 VIN CH 23 Discrete 15 I/O CH 15 Analog 44 COM CH 23 Discrete 16 I/O CH 16 Analog 45 IOUT CH 24 Analog 17 IOUT CH 17 Analog 46 IIN CH 24 Analog 18 IIN CH 17 Analog 47 VIN CH 24 Analog 19 VIN CH 17 Analog 48 COM CH 24 Analog 20 COM CH 17 Analog 21 IOUT CH 18 Analog 22 IIN CH 18 Analog 23 VIN CH 18 Analog 24 COM CH 18 Analog 25 IOUT CH 19 Analog 26 IIN CH 19 Analog 27 VIN CH 19 Analog 28 COM CH 19 Analog 29 IOUT CH 20


March 2005 2-31

2.9.5 Unterminated I/O Cable Assembly Connections

The Unterminated I/O Interconnect Cable Assembly does not have connector P2 installed. Wires are instead left for the user to terminate. Table 2-7 lists the wire color and identification information needed for termination. Refer to user wiring diagrams to make the proper cable connections to the termination assembly.

Table 2–7 Unterminated I/O Cable Assembly Wire Ident

J1, PIN P2, PIN WIRE/STRIPE

COLOR WIRE IDENT J1, PIN P2, PIN WIRE/STRIPE

COLOR WIRE IDENT

A2 75 WH/BLK DC+ C18 43 BLUE/VIO IIN CH 17 C2 74 WH/RED I/O CH 1 E18 45 BLUE/GRAY COM CH 17 E2 73 WH/BLUE I/O CH 2 A20 56 GRN/WH IOUT CH 18 A4 65 WH/GRN DC+ C20 57 GRN/BLK IIN CH 18 C4 49 WH/BRN I/O CH 3 E20 41 GRN/RED COM CH 18 E4 64 WH/OR I/O CH 4 A22 16 GRN/BLUE IOUT CH 19 A6 91 WH/YEL DC+ C22 3 GRN/BRN IIN CH 19 C6 104 WH/VIO I/O CH 5 E22 17 GRN/OR COM CH 19 E6 90 WH/GRAY I/O CH 6 A24 6 GRN/YEL IOUT CH 20 A8 100 RED/WH DC+ C24 19 GRN/VIO IIN CH 20 C8 101 RED/BLK I/O CH 7 E24 5 GRN/GRAY COM CH 20 E8 102 RED/BLUE I/O CH 8 A26 70 OR/WH IOUT CH 21

A10 36 RED/GRN DC+ C26 71 OR/BLK IIN CH 21 C10 47 RED/BRN I/O CH 9 E26 72 OR/RED COM CH 21 E10 46 RED/OR I/O CH 10 A28 85 OR/BLUE IOUT CH 22 A12 11 RED/YEL DC+ C28 98 OR/GRN IIN CH 22 C12 10 RED/VIO I/O CH 11 E28 84 OR/BRN COM CH 22 E12 24 RED/GRAY I/O CH 12 A30 96 OR/YEL IOUT CH 23 A14 22 BLUE/WH COM C30 94 OR/VIO IIN CH 23 C14 8 BLUE/BLK I/O CH 13 E30 95 OR/GRAY COM CH 23 E14 21 BLUE/RED I/O CH 14 A32 92 YEL/WH IOUT CH 24 A16 14 BLUE/GRN COM C32 78 YEL/BLK IIN CH 24 C16 27 BLUE/BRN I/O CH 15 E32 79 YEL/RED COM CH 24 E16 13 BLUE/OR I/O CH 16 A18 44 BLUE/YEL IOUT CH 17

Shield Wire

1 Shield Wire ---

NOTES: • DC+ is I/O power supply DC positive connection • COM is I/O channel common connection • CH is channel • P2 is omitted on unterminated cable assembly


2-32 March 2005

2.9.6 Terminal Block Connections

Use the following recommendations to prepare various wire ends for connection to terminal blocks.

Twisted Pair Connections

Twisted pair connections made to terminal blocks (as used to splice IOBUS cables) require special attention. It is important to preserve the continuous cable impedence as transition is made at the terminal block from one cable to another. Provision of a continuous impedence through all splice connections will minimize signal reflections, thus assuring collision-free communications. To preserve the inherent cable impedence, make sure that after preparing the cable ends, each intended pair is re-twisted at the same rate right up to the wire connectors of the terminal block.

Stranded Wire Connections

Stripped ends of stranded or solid wires must not be soldered or tinned in preparation for use with DIN rail terminal blocks. Solder is a malleable material and can loosen, causing open connections. Also, corrosion to the terminal block can result from the pickling agents or flux used with solder.

Multiple Wire Connections

When it is necessary to connect two or more wires or a combination of wires and component leads (for example, resistors and stranded or solid wire) to the same terminal, use a pin-type crimp-on connector to join these wires. Then, insert the pin of the crimp-on connector into the DIN rail terminal block. Also, use a pin-type crimp-on connector for connections that will be routinely connected and disconnected.

Wires and leads are crimped into the crimp-on connector and its pin is inserted into the selected terminal block connection. Siemens recommends the use of insulated crimp-on connectors available from electrical supply sources. Figure 2-12 shows an example of the use of a crimp-on connector.

NOTE

Use a crimping tool recommended by the connector manufacturer to ensure a strong mechanical, low electrical resistance connection.

Range Resistor

Signal Input WireCrimp-onConnector

Figure 2–12 Using a Pin-type Crimp-on Connector

Torque Specifications

Use the following torque specifications when tightening connections in DIN rail terminal blocks: • LMI (gray) DIN rail terminal blocks: 3.5 to 5.5 in. lbs. • Phoenix (green) DIN rail terminal blocks: 6.5 to 8.5 in. lbs.


March 2005 2-33

2.9.7 Protective Conductor Terminal

The MODULRAC and SIXRAC panels and the Local Termination Panel (if installed) have a protective conductor terminal located in the lower right corner of the panel. Optional ground wires can be connected from these terminals to safety ground. The symbol shown below and described in Table 1-2 is located adjacent to the terminal. Refer to APACS+ Grounding Practices (SD39GND-1) for safety ground recommendations.

Protective Conductor Ternminal Symbol

2.9.8 RAM Battery

The purpose of the RAM battery is to retain memory contents and real-time clock operation during power interruptions. The battery MUST be connected just prior to applying power to the SCM. See section 6 for battery life data.

IMPORTANT

When powered up, a disconnected or failed battery or a battery with a voltage below specifications will cause the SCM to reset.

Note the following:

• It is recommended that the battery be disconnected to preserve battery life when the module is placed in storage or stock.

• The battery is disconnected when a module is shipped from the factory.

To check the connection status of the battery and to connect the battery if it is disconnected, perform the following steps:

1. Place wrist strap on wrist and connect ground lead to module rack’s ground stud. ESD protection is required when the battery compartment is opened.

2. Loosen the battery compartment cover screw and open the pivoting cover.

3. Refer to Figure 2-13 and note the location of the battery and its plug.

4. If the module’s battery is not connected, orient the keyed plug and push it onto the circuit board connector pins. If the module’s battery is connected, proceed to step 5.

5. Proceed to section 2.9.9 to set the SECURITY Switch and close the battery compartment door.


2-34 March 2005

2.9.9 Security Switch Setting

The SCM’s SECURITY switch and 4-mation’s Security function block can be configured to either:

• Protect the data and/or configuration database stored in the SCM from being changed by any MODULBUS station (ie. other SCM, ACM, or PC running 4-mation software).

or

• Allow a transfer to overwrite the data and/or configuration database.

Note that the level of security is determined by the Security function block. The SECURITY switch is illustrated in Figure 2-13.

Set the SECURITY switch as follows:

1. Place a static protection wrist strap on the wrist and connect its ground lead to the module rack ground stud.

2. Loosen the battery compartment cover screw and open the pivoting cover. Identify the SECURITY switch, which is a toggle switch in a slotted opening located above the DIAG PORT connector.

3. Push the toggle right or left as follows.

• SECURITY ENABLE—Move the switch to the right, as indicated by the label • SECURITY DISABLE—Move the switch to the left

4. Secure the battery compartment cover and disconnect the wrist strap.

2.9.10 Downloading a Configuration

The configuration data for an SCM is compiled before downloading to the SCM. An SCM receives compiled configuration data via the diagnostic port located inside the battery compartment. A Compiler cable with MMJ jacks at each end connects the diagnostic port to the serial port of a Workstation or Rack-Mounted Industrial Computer (RIC) running 4-mation version 4.10 (or higher). The Compiler and cable are ordered as separate items and must be installed by the user prior to performing the downloading operation.

Refer to the Configuration Guide Using 4-mation Version 4.10 or Higher with the Satellite Control Module (CG39SCM-1) for details on:

• SCM configuration • Compiling the configuration • Downloading the configuration • Uploading the configuration.


March 2005 2-35

Figure 2–13 Security Switch and RAM Battery Locations

SD39SCM-1 Maintenance

March 2005 3-1

3 Maintenance

The Satellite Control Module (SCM) and its associated SCM Termination Strip require minimal maintenance. Some routine maintenance is recommended in the form of a visual inspection and a possible cleaning.

DANGER

Electrical shock hazard Explosion hazard

Will cause death, serious injury or property damage

• Remove power from all wires and terminals and verify that there

are no hazardous voltages before working on equipment. • In potentially hazardous atmosphere, remove power from

equipment before connecting or disconnecting power, signal, or other circuit, or extracting/inserting module.

• Observe all pertinent regulations regarding installation in hazardous area.

• Ensure all devices are rated for hazardous (classified) locations.

3.1 Tool and Equipment Requirements

The following tools and equipment are necessary for servicing:

• Common electronic servicing hand tools • Grounding wrist strap—use when replacing a backup battery or opening the battery compartment • Safety glasses and rubber gloves—use when handling a leaking lithium battery

3.2 Preventive Maintenance

The following subsections are the recommended preventive maintenance procedures.

3.2.1 Visual Inspection

The SCM and its associated SCM Termination Strip or SCM Marshalled Termination Assembly (whichever is installed) should be subjected to a periodic visual inspection. The frequency of inspection will depend on the severity of the operating environment. The primary aim of the inspection is to reveal an excessive accumulation of dust, dirt, or other foreign material adhering to the SCM and its Termination Strip. Excessive accumulation of dirt and dust prevents efficient heat dissipation and may eventually cause module or system failure. Refer to section 3.2.2 for cleaning instructions.

Maintenance SD39SCM-1

3-2 March 2005

The status of the SCM is indicated by LEDs located on its bezel. Refer to section 3.3.1 for LED indications.

The SCM will alarm on an overtemperature condition long before overtemperature failure is a possible threat.

3.2.2 Cleaning

Cleaning a module involves brushing or vacuuming the protective covers to restore cooling efficiency that may have been degraded by accumulated dust.

Cleaning a termination assembly involves careful brushing and vacuuming to remove accumulated dust and dirt harboring chemical particulate that may accelerate terminal, switch, or connector contact corrosion.

If the SCM is installed in a cabinet complying with the National Electronic Manufacturers Association (NEMA) 12/IP55 specification, the SCM does not require inspection for cleanliness.

3.3 Troubleshooting

Fault analysis focuses on identifying a failure as annunciated by the operator interface or by status LEDs located on the SCM’s bezel as listed in Table 3-1. If the operator interface alarm blocks have been configured, module errors will be reported. The error code with a description of the error and corrective action to be taken by the user can be accessed by the operator. There are no user replaceable parts inside the SCM.

Failure annunciation and fault analysis is also available within the 4-mation software (refer to Using the ProcessSuite 4-mation Configuration Software, CG39-20, located in binder UM39-11). Software messages and error codes are found in CG39-21. The on-line display of the “Module Tree” tool in 4-mation graphically represents both the hardware modules that comprise a system and the function that hardware performs. There is an entry in the Tree for each module including its node, rack, and slot address.

In the Module Tree, the SCM symbols are displayed to the left of the address. When 4-mation is running in the on-line mode, these symbols are displayed in one of three colors, depending upon a modules’s state of operation:

• Red—Indicates a module which is not initialized • Yellow—Indicates a module which is initialized but not configured • Green—Indicates a configured module

The SCM address text (e.g. [R01,S02] ) is displayed in one of four colors, based on error status:

• White—Indicates that error information could not be obtained from the module • Red—Indicates the module has errors • Green—Indicates the module has no errors • Yellow—Indicates the resource module has no errors but its I/O does


March 2005 3-3

Once a fault is identified, correct the fault by replacing the failed SCM with a known good module and return the failed SCM to one of the addresses in the warranty statement for repair. Refer to sections 3.9 or 3.10 to return a failed SCM for repair.


3-4 March 2005

3.3.1 Bezel LEDs

Three LEDs on the SCM’s bezel show module status as stated in Table 3-1.

Table 3–1 Status LED Indications

LED LABEL LED INDICATION SCM STATUS OK Steady GREEN

Flashing GREEN Steady RED Flashing RED OFF

SCM OK SCM not configured SCM control functions inoperative SCM control functions partially operative SCM input power fault

ACTIVE Steady GREEN OFF

SCM in active (control) mode; lit on active SCM of redundant pair SCM in standby mode or functions inoperative if OK LED is steady RED

3.3.2 Diagnostic Port

A diagnostic port is located in the bezel battery compartment. It is only to be used for downloading a new compiled configuration to the SCM. It is not a field troubleshooting port.

CAUTION

Attempting to use the diagnostic port for any other purpose than downloading a new configuration may result in loss of configuration and suspension of the process being controlled.


March 2005 3-5

3.4 SCM Removal/Replacement

A module can be removed from or installed in the rack without removing power from the module slot, from I/O circuits, or from the rack.

3.4.1 Removal

Refer to Figure 2-7 and the following removal procedure:

1. As shown in Figure 2-7, pull open the bezel’s pivoted top and bottom handles to expose the module’s slotted captive mounting screws. Loosen the screws.

2. Grasp the top and bottom handles and pull the module from the card cage.

3. If the module needs to be returned, place the module in a static shielding bag and package for return. Refer to section 3.9 or 3.10 for return instructions.

3.4.2 Replacement


1. Remove the replacement SCM from its protective bag. The module may be safely handled, as the circuit card is shielded from access by protective covers. If present, set aside the keying pin kit.

2. If the module is already keyed, confirm that its keying matches that of the removed module. If not keyed, key the replacement SCM as described in section 2.8.

3. Insert the SCM in its rack slot. Firmly seat the module in the backplane and termination board connectors. If the module does not seat, check for correct keying A properly seated module will have the rear of its bezel flush against the rack’s rails.

A keyed module that is not matched to a slot will not engage the backplane and termination strip connectors or seat flush against the rack’s front rails.

4. As shown in Figure 2-7, pull open the bezel’s pivoted top and bottom handles to expose the module’s slotted captive mounting screws and secure the module to the top and bottom rails. Close the bezel’s handles when finished.

CAUTION

Do not use the captive mounting screws to seat the module. Damage to the bezel can result.


3-6 March 2005

3.5 SCM Termination Strip Removal/Replacement

Sections 3.5.1 and 3.5.2 describe the removal and replacement procedures for the SCM Termination Strip.

3.5.1 Removal


1. As necessary, take appropriate steps to shutdown the processes monitored or controlled by the field devices connected to the SCM Termination Strip.

2. Refer to section 3.4 and remove the associated SCM from its slot in the rack. Place the SCM in a static shielded bag for protection.

3. Unplug signal terminals from the SCM Termination Strip. Disconnect power leads from terminals.

4. Loosen the SCM Termination Strip’s captive mounting screws. Gently lift the bottom of the strip in an arc until it is free of its alignment pin located immediately above the “MOORE” logo. Pull the top of the termination strip from the grooved backplane spacer and lift it from the rack.

3.5.2 Replacement

Refer to Figure 2-2 and the following replacement procedure:

1. Refer to section 2.6 and install the replacement termination strip.

2. Reconnect (plug in) the signal terminals and reconnect power leads to terminals.

3. Install the SCM as explained in section 3.4.


March 2005 3-7

3.6 SCM Marshalled Termination Assembly Removal/Replacement

Sections 3.6.1 and 3.6.2 describe the removal and replacement procedures for the SCM Marshalled Termination Assembly.

3.6.1 Removal


1. As necessary, take appropriate steps to shutdown the processes monitored or controlled by the field devices connected to the Marshalled Termination Assembly (MTA).


3. Unplug the signal and power terminals from the MTA.

4. Refer to Figure 2-4 to remove the MTA from the DIN rail.

3.6.2 Replacement

Refer to Figure 2-4 and the following replacement procedure:

1. Refer to section 2.7 and install the replacement SCM MTA.

2. Reconnect (plug in) the signal and power terminals.

3. Install the SCM as explained in section 3.4.

3.7 Interconnect I/O Cable Removal/Replacement

Sections 3.7.1and 3.7.2 describe the removal and replacement procedures for an Interconnect I/O Cable.

3.7.1 Removal

Refer to Figures 2-2 and 2-6 and the following removal procedure:

1. As necessary, take appropriate steps to shutdown the involved process.


3. At the Marshalled Termination Assembly, disconnect theInterconnect I/O Cable’s connector P2 or the Unterminated I/O Cable’s individual connections. All individual connections should be labeled for correct reconnection.


3-8 March 2005

4. At the rack, loosen the cable’s captive mounting screws. Gently lift the bottom of the cable in an arc until the cable is free of its alignment pin. Pull the top of the cable from the grooved backplane spacer and lift it from the rack.

5. Remove the cable from the cable tray or other cable routing equipment.

3.7.2 Replacement

Refer to Figures 2-2 and 2-6 and the following replacement procedure:

1. Route the Interconnect I/O Cable Assembly between the rack and marshalling cabinet.

2. Install the cable as described in section 2.7.3.

3. Install the SCM as described in section 3.4.

3.8 RAM Battery Replacement

A 3.6V lithium battery is housed in the module’s bezel battery compartment. When power is removed from the SCM, the battery maintains SCM memory (RAM) to retain the configuration and executable code.

The condition of the battery is monitored by software. A weak battery will be indicated by System Service Code (SSC) 28, Error Code (EC) 01. A disconnected battery will be indicated by SSC 28, EC 19. The error code and message will be displayed on the system’s computer running 4-mation Release 2 or higher software.

If the battery is weak and a configuration is stored in the SCM, replace the battery with power applied to the SCM. If the configuration is lost, it can be quickly downloaded using 4-mation software.

Replace a battery as follows:

1. To protect the SCM from electrostatic discharge, snap on a wrist strap and connect its ground lead to the ground stud on the module rack panel.

2. Loosen the bezel compartment screw and open the door. See Figure 2-13.

3. Unplug the battery; note how the connector is keyed.

4. Pull the battery from the compartment; a cloth hook and loop fastener secures the battery.

5. The replacement battery is supplied with a new hook and loop fastener. Separate the fastener halves.

6. If the compartment mounted portion of the fastener is damaged, remove it and install the separated fastener half.

7. Mount the new RAM battery in the compartment.


March 2005 3-9

8. Orient the keyed battery connector and plug it into the circuit board mounted connector.

9. Close and secure the battery compartment door. Remove the wrist strap.

Battery handling and disposal precautions are described below.

WARNING

Lithium Battery:

• Properly handle replacement and removed batteries • Properly dispose of a removed battery • Do not burn a battery • Do not short circuit battery terminals • Do not attempt to charge the battery • If electrolyte is exposed, wear safety glasses and rubber gloves when handling the battery • For details contact battery manufacturer

3.9 Spare and Replacement Parts

One spare Satellite Control Module and battery should be stocked for every 1 to 10 in service. Spare and replacement parts can be ordered from one of the addresses in the Warranty statement or through a local Siemens representative.

Refer to section 5 for the part numbers of optional and accessory items. Assembly part numbers are printed on most modules and associated hardware. When ordering, provide the model number, part number, serial number, and software compatibility identification code from the module to be replaced or spared. A purchase order number should also be included.

IMPORTANT

When placing an SCM in spare parts stock, unplug the battery connector. This will extend battery life. Refer to steps 1 to 3 in section 3.8 for the procedure. Also, a cooler storage temperature extends battery life.


3-10 March 2005

WARNING

Lithium Battery:

• Store battery in original shipping container • Do not store battery loosely in a metal bin or short circuit battery terminals • Store a battery in a cool well ventilated area; maximum storage temperature

should not exceed 85°C (185°F)

3.10 Return of Equipment within North America

If The SCM needs to be returned for any reason, perform the following:

To Return Equipment

• Call the Repair Order Group at (215) 646-7400, ext 4RMA (4762) weekdays between 8:00 a.m. and 4:45 p.m. eastern time to obtain an RMA number. Mark the RMA number prominently on the outside of the shipment.

• When calling for an RMA number, provide the reason for the return. If returning equipment for repair, failure information (e.g. error code, failure symptom, installation environment) will be requested. Supply a purchase order number for repairs.

Material Safety Data Sheet

A Material Safety Data Sheet (MSDS) must be included with each item being returned that was stored or used anywhere hazardous materials were present.

Packaging

Package assembly in original shipping materials. Otherwise, package it for safe shipment or contact the factory for shipping recommendations. A module must be placed inside a static shielding bag to protect it from electrostatic discharge.

3.11 Return of Equipment Outside of North America

Contact the appropriate Siemens product support group listed in section 1.2 of this Instruction. Provide the reason for the return. For repairs, supply a purchase order number. Request equipment packaging and shipping instructions.


March 2005 3-11

3.12 Maintenance Records

An accurate record keeping system for tracking maintenance operations should be established and kept up to date. Data extracted from the record may serve as a base for ordering maintenance supplies, including spare parts. The record may also be useful as a troubleshooting tool. In addition, maintenance records may be required to provide documentary information in association with a service contract. It is suggested that the following information be recorded:

1. Date of service incident 2. Name or initials of service person 3. Brief description of incident symptoms and repairs performed 4. Replacement part or assembly number 5. Software compatibility code of original part 6. Software code of replacement part 7. Serial number of original part 8. Serial number of replacement part 9. Issue number of original circuit module 10. Issue number of replacement circuit module 11. Date of completion

SD39SCM-1 Circuit Description

March 2005 4-1

4 Circuit Description

Described are the three major sections that comprise the Satellite Control Module (SCM).

4.1 Processor/Communication Section

The following subsections describe the processor/communication sections of the SCM.

4.1.1 Processor

The processor/communications section is driven by a Motorola 68360 controller integrated circuit (IC). The controller provides the processing power of a 68020 IC and a variety of memory, peripheral management, and communications coprocessors on a single chip.

4.1.2 IOBUS

The IOBUS elements consist of an IOBUS modem and dual IOBUS line drivers/receivers. The 68360 Communications Controller supervises IOBUS communications through handshaking operations with the IOBUS modem. The IOBUS modem

• converts received IOBUS data into a form suitable for data processing. • converts serial data from the 68360 into a form suitable for transmission over the IOBUS. • limits the length of time the SCM can transmit over the IOBUS in the event of a controller failure.

4.1.3 SPIBUS

The SPIBUS is a local communication bus used by the SCM and its I/O modules. The SPIBUS has a daisy-chain architecture; therefore, inserting any non-client modules between an SCM and its client modules, or removing a client module, shuts down SPIBUS. Use of multiple SCMs is supported only in MODULRACs identified by part number/rev number 16114-171/05 or higher. A MODULRAC with a revision number 04 or lower can support only one SCM, since its circuitry connects the SPIBUS signals linearly rather than in a daisy-chain fashion, thus limiting the use of one SCM per MODULRAC (multiple SCMs would attempt to control each other’s internal peripherals and/or client modules). This restriction does not exist with SIXRAC. An SCM breaks the SPIBUS connections on its left and starts a new SPIBUS segment.

The SPIBUS elements consist of a data transceiver section and the following:

• Address Generator—The address generator specifies at which slot address the client being addressed is residing. There is an additional address bit which allows two logical SPI entities to reside at each slot address.

• SPIBUS Clock—The SPIBUS clock is generated by the SCM and clocks both outgoing and incoming data. The SPIBUS data rate is 750 kbps.

Circuit Description SD39SCM-1

4-2 March 2005

4.1.4 Serial Ports

The serial ports available on the front of the SCM bezel are configured as a DTE; they are designed for direct connection to a modem or similar apparatus. Each port is controlled by the 68360 and an RS-232 line driver/receiver.

4.1.5 Diagnostic Port

The diagnostic port located behind the hinged bezel door is to be used only for local downloading of a new configuration to the SCM.

IMPORTANT

Do not leave the download cable connected after the download is complete. Do not attempt to use the diagnostic port for any other purpose, as unpredictable operation of the SCM may result.

4.2 Discrete I/O Section

The following subsections describe the discrete I/O section of the SCM.

4.2.1 Processor

The discrete I/O section is driven by a Motorola 68332 controller IC. This provides the processing power of a 68000 IC and a variety of memory, peripheral management, and time function coprocessors on a single IC.

4.2.2 External Power

The discrete I/O section derives its power from the user-provided I/O power supply. The user must provide power to the discrete section, even if only discrete inputs are to be used.

4.2.3 Output Channel

All output channels are electrically identical. A power MOSFET switches the user’s power to a field device when the channel is used as an output. The current through the MOSFET is monitored by a driver IC. If the current exceeds a preprogrammed amount, the MOSFET is turned off. There is also a fuse at the output of the MOSFET in case the MOSFET fails shorted. The input circuitry is connected to the load side of this fuse so that the fuse status can be monitored by software.

SD39SCM-1 Circuit Description

March 2005 4-3

4.2.4 Conventional Input

All input channels are electrically identical. The input circuit has approximately 100 Kohm input impedance; this is for compatibility with magnetic pickups. If line wetting is required, the user must provide an external resistor. The input voltage is attenuated and applied to the input of a comparator. The other input of the comparator is driven from an 8-bit D/A converter; this allows the threshold level to be set from -4V to 60V in 1/4V increments.

4.3 Analog I/O Section

The following subsections describe the analog I/O section of the SCM.

4.3.1 Processor

The analog I/O section uses a Motorola 68HC11 processor. All program and data memory is on the processor chip.

4.3.2 Analog Output Channel

All analog output channels are electrically identical. Each output channel consists of a D/A converter which outputs a 1V to 5V signal and an output buffer, which can be configured to produce a controlled voltage or current. The input circuit reads the voltage at the feedback pin of the output buffer; this provides a diagnostic check of the output.

4.3.2.1 Voltage Output

In the voltage output mode, the buffer is configured to act as a voltage follower, ensuring that the output voltage is the same as the voltage generated by the D/A converter.

4.3.2.2 Current Output

In the current output mode, a 250 ohm resistor is connected from the buffer feedback terminal to ground. The load is placed between the output of the buffer and the feedback terminal. The buffer forces the voltage across the 250 ohm resistor to be the same as the voltage produced by the D/A converter; therefore, 1V to 5V across the resistor corresponds to a 4 mA to 20 mA current flowing through the resistor and through the load.

NOTE

The ratio between the current and voltage is dependent on the value of the external resistor and its wiring. It is strongly recommended that the actual value of the resistor and external wiring be measured and entered into the appropriate softlist parameter to ensure maximum accuracy.

Circuit Description SD39SCM-1

4-4 March 2005

4.3.3 Analog Input Channel

All analog input channels are electrically identical. Each input channel passes through a low-pass filter, a multiplexer, a buffer, and an A/D converter with an input range of 1V to 5V.

4.3.3.1 Voltage Input

For voltage inputs, the field wiring is connected between the input terminal and ground. The input voltage is passed to the A/D converter and read directly.

4.3.3.2 Current Input

For current inputs, a 250 ohm resistor is connected from the input terminal to the return terminal. This will develop a required sensing voltage across the resistor.

NOTE

The ratio between the current and voltage is dependent on the value of the external resistor and its wiring. It is strongly recommended that the actual value of the resistor and external wiring be measured and entered into the appropriate softlist parameter to ensure maximum accuracy.

The following are examples of devices connected as current inputs:

• Two-Wire Transmitters - A two-wire transmitter is connected between the output buffer terminal and the input terminal. When the channel is configured as an input, the output is set to full scale and the transmitter regulates the actual loop current. This current passes through the 250 ohm resistor and is converted into a voltage which is read by the A/D converter.

• Four-Wire Transmitters - A four-wire transmitter is connected between the input terminal and the return terminal. The output current of the transmitter passes through the 250 ohm resistor and is converted into a voltage which is read by the A/D converter.

SD39SCM-1 Model Designation

March 2005 5-1

5 Model Designation

Refer to Figure 5-1 to decode the model designation.

IMPORTANT

Before installing, applying power, or servicing, review the model designation on the nameplate and this section for required power, options, and electrical classification.

39SCM N N N A A N Satellite Control Module (SCM) Approvals: N=Default Approvals Software Revision Level: A=4.10 Hardware Revision Level: A to Z Reserved for future use Reserved for future use Reserved for future use

Figure 5–1 Model Designation

5.1 Accessories

Refer to Table 5-1 for the list of available accessories for the SCM.

Table 5–1 SCM Accessories

PART NUMBER DESCRIPTION

16114-97 Marshalling Utility Panel (Figure 2-4). Includes installed wire ducts and DIN rails for mounting marshalled termination assemblies. For installation in an APACS MODULPAC cabinet.

16114-12 Blank Utility Panel (Figure 2-4). Similar to above but without installed ducts and rails. For installation in an APACS MODULPAC cabinet.

16056-468

End Stop Kit. End Stops prevent the sliding of an SCM Marshalled Termination Assembly along the mounting DIN rail.

16137-199 SCM Download Cable 14743-2 RAM Battery, 3.6 V Lithium 16056-562 (single piece number)

Mounting Ear (see Figure 2-8). Provides for a flat mounting of the SCM Marshalled Termination Assembly. Four pieces required. Refer to section 2.8.2.

Model Designation SD39SCM-1

5-2 March 2005

5.2 Options

Table 5-2 lists the available SCM options. A selection of the type and quantity of termination assemblies is made by the user. When marshalled termination assemblies are selected, a selection from the list of Interconnect I/O Cables must also be made.

Table 5–2 SCM Options

Part Number Description 16274-31 SCM Termination Strip 16291-31 SCM Marshalled Termination Assembly 16137-122 Interconnect I/O Cable Assembly 5.7 ft. (1.75 m) 16137-114 Interconnect I/O Cable Assembly 10 ft. (3 m) 16137-115 Interconnect I/O Cable Assembly 26.2 ft. (8 m) 16137-116 Interconnect I/O Cable Assembly 49.2 ft. (15 m) 16137-117 Interconnect I/O Cable Assembly 98.4 ft. (30 m) 16137-118 Unterminated Interconnect I/O Cable Assembly 10 ft. (3 m) 16137-119 Unterminated Interconnect I/O Cable Assembly 26.2 ft. (8 m) 16137-120 Unterminated Interconnect I/O Cable Assembly 49.2 ft. (15 m) 16137-121 Unterminated Interconnect I/O Cable Assembly 98.4 ft. (30 m)

SD39SCM-1 Specifications

March 2005 6-1

6 Specifications

This section lists the specifications for the Satellite Control Module (SCM).

6.1 Module Specifications

Table 6-1 lists the SCM’s mechanical, electrical, and environmental specifications.

Table 6–1 SCM Specifications

TYPE SPECIFICATION DATA

Backplane Operating Voltage 24 Vdc, ± 10% Backplane Current 0.30 amps Electrical Isolation Dielectric strength tested with

1920 Vac between I/O channels and ground for 1 second

Operating (Discrete I/O)Voltage 21.0 to 52.8 Vdc, 24.0/48.0 nominal

Immunity, Electrostatic Discharge (ESD)

IEC 1000-4-2 Contact discharge 8 kV Air discharge: 15 kV air

Immunity, Radiated Electromagnetic Field (RFI)

IEC 1000-4-3 10 V/m 27 to 1000 MHz

Immunity, Power Lines, Surge IEC 801-4 4 kV

Operating Temperature 0 to 60 C (-32 to 140 F) Operating Humidity 5 to 95%, non-condensing Storage Temperature -25 to 85 C (-13 to 185 F) Storage Humidity 0 to 100%, condensing

SCM in powered rack: 10 years. Storage w/battery disconnected: 10 Years@23°C, 9.5 Yrs@71°C, 8.5 Yrs@85°C

Module

Battery Life Expectancy:

Storage w/battery connected: 1 Month

Voltage Input Range 1 to 5V Current Input Range 4 to 20 mA Accuracy 0.5% of span

Analog Inputs

Resolution 12 bits

Specifications SD39SCM-1

6-2 March 2005

TYPE SPECIFICATION DATA Voltage Mode Accuracy 0.5% of span Voltage Mode Resolution 12 bits Output Current Range 4 to 20 mA

Analog Outputs

Current Mode Accuracy 0.5% of span Input Delay Filter Time 1.8 ms. typ. Input Wetting Current None, user provided “ON” State Voltage Range User-selectable “OFF” State Voltage Range User-selectable

Discrete Inputs

Maximum “OFF” State Current 3.0 mA Output Current per Channel 0.6 amps, max. Output Current per Module 9.6 amps max. at 60 C (140 F) Output Fuse Rating 2 amps (non-field replaceable) Surge Current 2.0 amps max. for 10 msec.

Discrete Outputs

“OFF” State Leakage Current 1.6 mA (non-redundant)

6.2 Agency Approvals

IMPORTANT

Before installing, applying power to, or servicing an SCM, see the module’s nameplate for electrical classification.

apacs+™ satellite control module (scm)

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