nex star 66109923001 e

AD4305

RS-485 AND RS-232 MULTIPLEXER

Installation & Operation47102 Mission Falls Court Fremont, CA 94539-7818

PHONE (510)360-7800 FAX (510)360-7820

an ISO 9001 certified company

AD4305 NexStar—66109923001 Rev. E —11/15/01— © 2001 NexWatch

© 2001 NexWatch. All Rights Reserved DigiReader™, QuadraKey™, 2Smart™, NexKey™, KeyMate™ and NexStar™ are trademarks of NexWatch Printed in the United States of America

2 AD4305 NexStar—66109923001 Rev. E—11/15/01—© 2001 NexWatch

. . .

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LIMITED WARRANTYNexWatch warrants to the original user the equipment manufactured by NexWatch as described herein to befree from defects in material and workmanship for a period of one year from the date of purchase by suchuser or fifteen (15) months from the date of shipment from the factory, whichever is sooner (command key /magnetic stripe card warranties differ, see below*), provided:

I NexWatch has been notified within such period by return of any alleged defective equipment, free and clear of any liens and encumbrances to NexWatch or its authorized dealer at the address spec-ified, transportation prepaid; and

II the equipment has not been abused, misused or improperly maintained and/or repaired during such period; and

III such defect has not been caused by ordinary wear and tear; and

IV such defect is not a result of voltage surges/brownouts, lightning, water damage/flooding, fire, explosion, earthquakes, tornadoes, acts of aggression/war, or similar phenomena; and

V accessories used as integral to NexWatch systems have been approved by NexWatch (e.g., coaxial cables, batteries, etc.); and

VI the equipment has been installed, the installation supervised or installation tested by an authorized NexWatch dealer.

NexWatch shall at its option, either repair or replace, free of charge, the equipment found, upon NexWatch’sinspection to be so defective, or, if agreed upon, refund the purchase price, less a reasonable allowance fordepreciation, in exchange for the equipment.

NexWatch makes no other warranty, and all implied warranties including any warranty of merchantability orfitness for a particular purpose are limited to the duration of the expressed warranty as set forth above.

NexWatch’s maximum liability hereunder is limited to the purchase price of the equipment. In no event shallNexWatch be liable for any consequential, indirect, incidental or special damages of any nature arising fromthe sale or use of the equipment.

Some states do not allow limitations on incidental or consequential damages or how long an implied warrantylasts, so the above limitations may not apply. This warranty gives specific legal rights; however, other rightswhich vary from state to state, may pertain.

* Analog command keys are warranted for 5 years; digital command key / magnetic stripe card warrantiesvary—see product literature.

The information in this manual is believed to be accurate and reliable. However, NexWatch assumes no responsibility for any errors that may appear. Possession of this manual does not imply the granting of licenses to make or sell equipment or software constructed according to descriptions provided.

AD4305 NexStar—66109923001 Rev. E—11/15/01— © 2001 NexWatch 3

FCC RF INTERFERENCE STATEMENT

The NexStar RS-485 Multiplexer sold by NexWatch has been tested and found to complywith the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limitsare designed to provide reasonable protection against harmful interference in a residentialinstallation. This equipment generates, uses and can radiate radio frequency energy and ifnot installed and used in accordance with the instructions herein, may cause harmful interfer-ence to radio communications. If this equipment does cause interference to radio or televi-sion reception, consult the dealer or an experienced radio/television technician for correction.

The user may find helpful the following booklet, prepared by the Federal CommunicationsCommission: “How to Identify and Resolve Radio/TV Interference Problems." This booklet isavailable from the US Government Printing Office, Washington DC 20402, stock number:004-000-00345-4.

UL-294 Notice

The NexStar RS-485 Multiplexer is UL-294 listed andmay be used in a UL-294 listed access control system.All system components must be UL-294 listed andinstalled according to manufacturers' instructions to com-ply with UL-requirements.

.................................

47102 Mission Falls Court, Fremont, CA 94539-7818


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TABLE OF CONTENTSPage

Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Physical Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9PC Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Termination Resistor Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Connections and RS-485/RS-232 Personality Switches . . . . . . . . . . . . . . . . . . 13RS-232 Adaptor Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14RS-232 Adaptor Decal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Phoenix Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Wire Insertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16S-NET Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

LIST OF FIGURES AND TABLES

Figure Table Description Page 1 Using AD 4305 NexStars in a Complete System. . . . . . . . . . . . . . . . . . 7

1 AD 4305 NexStar Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2 AD 4305 NexStar Base and Mounting Holes. . . . . . . . . . . . . . . . . . . . . 9

2 AD 4305 NexStar Component Locations . . . . . . . . . . . . . . . . . . . . . . . 10 3 AD 4305 NexStar Pin Usages/Designations for RS-485/232. . . . . . . . 10

3 AD 4305 NexStar LEDs, Fuses, Switches and Connectors. . . . . . . . . 11 4 AD 4305 Com-Active andTransmit LEDs . . . . . . . . . . . . . . . . . . . . . . . 12 5 AD 4305 Nexstar Switches and Fuses . . . . . . . . . . . . . . . . . . . . . . . . . 12

4 Approved Fuse Vendors for the AD 4305 NexStar . . . . . . . . . . . . . . . 13 6 AD 4305 NexStar Termination-Resistor Switches. . . . . . . . . . . . . . . . 13 7 AD 4305 NexStar RS-485/232 Personality Switches. . . . . . . . . . . . . . . 14 8 AD 4305 NexStar RS-232 Adapter (Piggy-back) Module. . . . . . . . . . . 14 9 AD 4305 NexStar RS-485 Printed and RS-232 Decal Pin-Outs. . . . . . 15 10 AD 4305 NexStar S-NET Connector Pin-Outs . . . . . . . . . . . . . . . . . . . 15 11 Wire Insertion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5 Recommended S-NET Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 12 S-NET Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18


SCOPE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .S C O P EThis manual provides information necessary to install, use and troubleshoot a NexStar RS-485 Multiplexer. It is assumed that the person reading this manual is familiar with accesscontrol systems and standard installation practices. The information provided in this manualis not intended to conflict with the building, electrical, fire or safety codes required for anygiven installation.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I N T R O D U C T I O NThe NexStar is a symmetrical 5-port repeater with built-in arbitration logic. Any one port willrelay the data it receives to the other four ports. Bus arbitration is done on a first-come, first-served basis. During periods of no activity, the NexStar automatically places all 5 ports intothe receive mode to wait for the next message. Make sure your AD 4305 NexStar is Rev.C orlater. (You can confirm this as follows: temporarily remove the case of the NexStar unit;observe the PLD at U6, part number 62109921001: it should have a label stating Rev.C,checksum B5A1.)

The AD 4305 NexStar can be used to link multiple NexWatch access control units, such asthe NexSentry 4100/Star I or SE818SC to a host. The optional RS-232 module can beplaced into one of the channels to allow host connection (25 feet maximum cable length).The controllers can then be up to 4000 feet (1200 meters) from the NexStar. The NexStaralso provides a link between the ACU and multiple S-NET runs. A single S-NET run can be amaximum of 4,000 feet (1,200 meters). Using all of the NexStar ‘s five symmetrical ports,the end-to-end S-NET length can span up to 8,000 feet (2,400 meters) and contain up to20,000 feet (6,000 meters) of installed wiring.

In the simplest configuration, the NexStar allows home-run wiring, which eliminates exces-sively long wire runs and the need to make multiple connections to a single terminal block.

Any or all of the RS-485/S-NET ports may be configured to communicate via RS-232 byinstalling an optional RS-232 adapter module. This application is typically employed


. . .

. .INTRODUCTION

between a Host PC and several local ACUs. In this configuration, One NexStar port is con-nected to the Host, and up to 4 ports may be connected to ACUs. If an ACU port is config-ured for RS-485, up to 16 Star Controllers may be connected on one RS-485 loop. If an ACUPort is configured for RS-232, one ACU, or one CoBox master Thinserver (Ethernet adapter)may be connected. The NexStar acts as a replacement for the CI-8, or an RS-232 to RS-485converter, depending on the specific application.

Figure 1: Using AD 4305 NexStars in a Complete System

For more examples, see the NexWatch web site at “www.nexwatch.com.” Click on SERVICE

SUPPORT MATRIX, and then on WIRING FAQ.

DR4205K

MSRK DR4208S

DR4220

DR4205

DR4203

4000 FEET(1200 METERS)

NEXSTAR

DR4205K

DR4203

DR4205K

DR4205K

DR4205K

DR4203

All

ACU

4100(4108)

(SNET)RS485

(SNET)RS485

HOST

NEXSTAR54321

RS232Ports 1 & 2

Ports 3, 4 & 5All RS485

ACU

Star Ior

Star II

RS485Up to

4000 feettwisted pair +/-

1 wire for GNDshielded

1

RS232 Host Port

TB3(RS485Host Port)

For NexStar 1,NexStar

NexStar

2

For NexStar 2,all 5 ports are RS485

ports 3, 4 & 5 are all RS485ports 1 & 2 have RS232 adapters;

54321


SPECIFICATIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .S P E C I F I C A T I O N SSpecifications for the NexStar are shown in the table below.

Table 1: AD 4305 NexStar Specifications

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P H Y S I C A L D E S C R I P T I O NThe NexStar consists of a single printed circuit board (PC board) in a two-part housing. MalePhoenix connectors on the PC board are accessed through the side of the housing for portconnections.

CoverThe cover of the NexStar snaps onto the base. The LEDs mounted on the PC board are vis-ible through holes on the cover and identified on the cover. The cover also identifies the RS-485 pin-out wiring for each port. For any of the ports optionally used for RS-232 a decal isprovided (to overlay the RS-485 information) to identify the RS-232 pin-out wiring. See Fig-ure 9: AD 4305 NexStar RS-485 Printed and RS-232 Decal Pin-Outs.

Input Voltage +12.5 VDC to +24 VDC

Operating Current 50 milli-ampères

Pass-Through Current up to 3.15 ampère (rating of fuses)

Operating Humidity 0% to 90%, non-condensing

Operating Temperature 19° F to 120° F -7° C to 49° C

Dimensions 8.0” x 4.5” x 1.5” 20.32 cm x 11.43 cm x 3.81 cm

Weight 13 oz 400 grams


. . .

. .PHYSICAL DESCRIPTION

BaseThe base of the housing has four through holes for mounting the NexStar to a wall or othersurface. Four standoffs are affixed to support the PC board.

Figure 2: AD 4305 NexStar Base and Mounting Holes

PC Boa rdAll components and circuitry are contained on the single PC Board. Figure 3 shows theboard locations of LEDs, fuses, switches and connectors. These components are listed inTable 2 and further described below.

7.29 in 18.52 cm

3.20 in8.13 cm

Mounting Hole x 4Stand-Off x 4


PHYSICAL DESCRIPTION

Table 2: AD 4305 NexStar Component Locations

Table 3: AD 4305 NexStar Pin Usages/Designations for RS-485/232.....

PC Board Location

Label Function LED Conn-ector

Fuse Comm Switch

Comm IC

TX-1 Port 1 Transmit CR14 J1 F1 S1 U1





COM ACTIVE Activity CR19

RS485Pin Use forPins 1 to 5 forconnectors J1 to J5

Pin 5 Shield

RS232Pin Use forPins 1 to 5 forconnectors J1 to J5

Pin 5 Shield *

Pin 4 GND Pin 4 GND

Pin 3 DATA B Pin 3 RX D

Pin 2 DATA A Pin 2 TX D

Pin 1 + 24 VDC Pin 1 + 24 VDC *

* Not necessary for data-only connection


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Figure 3: AD 4305 NexStar LEDs, Fuses, Switches and Connectors.....

LEDsThe COM ACTIVE LED will be illuminated when any data is being passed through the Nex-Star. The five port LEDs will illuminate when the associated port is transmitting. On the leftside of Figure 4, the NexStar is receiving data from an ACU on port one. This data is thentransmitted to all the remaining ports. All LEDs except TX-1 are illuminated. On the rightside of the figure, the NexStar is receiving data from an S-NET device on port 3. Again, datais transmitted to all other ports; all LED's except TX-3 are illuminated.

Oo

oo

o

oo

o

RS-485 Comm IC

RS-232 Adapter Module

RS-232RS-485 with terminator

B C

ON

OFF

OFF

RS-485 w/o terminator

A

OFF

ON

ON

RS-485/232 Personality Switch

+24VDCDATA ADATA B

SHIELD

+24VDC

SHIELD

+24VDCDATA ADATA B

GNDSHIELD

+24VDCDATA ADATA B

SHIELD

+24VDCDATA ADATA B

SHIELD

GND

GND

GND

GND



Figure 4: AD 4305 NexStar Com Active and Transmit LEDs..... Note: High speed network communications may cause all LEDs to appear illuminated.

Fu sesEach of the five ports on the NexStar is individually fused. Fuses for the ports are located atpositions F1 through F5 on the PC Board. These fuses are 2-amp, normal-blow. Approvedsuppliers for replacement fuses and the vendors' part numbers are shown in Table 4.

Figure 5: AD 4305 NexStar Switches and Fuses....

S-NET S-NET S-NET S-NET ACU

TX-5 TX-4 TX-3 TX-2 TX-1

COMM ACTIVE

ACUS-NET S-NET S-NETS-NET

TX-5 TX-4 TX-3 TX-2 TX-1

COMM ACTIVE


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Table 4: Approved Fuse Vendors for the AD 4305 NexStar.....

Termi nat i on Res i s tor Swi t chesTermination is made within the five RS-485/232 personality switches shown in the figure below and described below.

Figure 6: AD 4305 NexStar Termination-Resistor Switches.....

The need for termination increases with bus length. With short S-NET runs—shorter than500 feet—termination is not needed. Around 500 feet, it becomes desirable for at least oneend to be terminated. For runs over 1,000 feet, terminate the runs at each end.

Conn ect ors an d RS -4 85 / RS- 232 Perso na l i ty S wi tch esFive connectors, J1 through J5, are used to connect equipment through the NexStar. FiveRS-485/232 personality switches, S1 through S5, are associated with these connectors,switch S1 with connector J1, and so forth. One connector may be used to provide a short-range attachment to the ACU and the switch associated with this connector should not be setfor termination. Set any of the remaining switches, S1 through S5, appropriately for longer S-NET buses which might require termination, as described below.

Approved Manufacturers’ Part Numbers

Fuse

Description Type WickmanTR5 Series

SchurterMST Series

BelMRT Series

F1 - F5 S-NET Connector J1-J5 3.15-Amp LF 19372K-124 #34.6620 0692-3150-01

RS-485 with terminator

OFF

ON



Figure 7: AD 4305 NexStar RS-485/232 Personality Switches.....

There are three valid settings for the switches. Setting A for RS-485 without termination, thetwo outside toggles on and the middle toggle off. Setting B for RS-485 with termination, alltoggles on. Setting C for RS-232, all toggles off.

RS- 232 Adap t or Modu leFor S-NET, RS-485 operation, the RS-485 Comm IC, is left in place on the PC motherboard.For RS-232 operation, this IC is replaced by the RS-232 Adapter module (P/N 62110572001)in any—or all—of the locations U1 through U5, making sure the pin 1 notches match. In addi-tion, for any RS-232 Adapter module installed, the RS-485/232 personality switch associatedwith the installed adapter must be with all toggles off.

Figure 8: AD 4305 NexStar RS-232 Adapter (Piggy-back) Module.....

RS- 232 Adap t or Deca lAfter replacing one or more of the RS-485 Comm ICs with RS-232 Adapter module(s) andsetting the RS-485/232 personality switch(es) for RS-232, close and secure the case of the

RS-232RS-485 with terminator

B C

ON

OFF

OFF

RS-485 w/o terminator

A

OFF

ON

ON

RS-485/232 Personality Switch

Oo

oo

o

oo

o

RS-232 Adapter Module


. . .


AD 4305 NexStar. For all of the RS-232 Adapter modules installed, apply the RS-232Adapter decal(s) to the front of the case, overlaying the RS-485 legend(s) appropriately. If,say, U4 has the RS-232 Adapter module installed and the personality switch S4 has been setwith all toggles off, then the RS-232 Adapter decal should be applied to change the connec-tor J4 legend from the RS-485 pin-outs to the RS-232 pin-outs, as shown below.

Figure 9: AD 4305 NexStar RS-485 Printed and RS-232 Decal Pin-Outs.....

Ph oen ix Co nn ect orsThe five ports have male, five-pin Phoenix connectors. The pin-outs for the female Phoenixconnector for S-NET branches are shown in Figure 10.

Figure 10: AD 4305 NexStar S-NET Connector Pin-OutsThe shield wire is connected to the ACU ground to provide single-point grounding. See theappropriate ACU manual for additional information.

+24VDCDATA ADATA B

GNDSHIELD

+24VDC RXD

SHIELDGND

Data twisted pair

Power and Ground twisted pair

SHIELD

GROUND

DATA-

DATA+

+24VDC



Wire In ser t i onFor wire insertion to Phoenix connectors, the following procedure is recommended:

1. Strip the wire end.

2. Twist the exposed strands tightly and tin the ends.

3. Crimp an appropriate size ferrule on the end of the wire. Be sure that the ferrule iscrimped on bare conductor metal, not the insulation.

Figure 11: Wire Insertion4. Insert ferrule in the appropriate Phoenix connector terminal. Tighten the connector bind-

ing screw and torque to 5 inch-pounds (0.56Nm).

S- NET Wi r i ngS-NET is a serial network for communication between the ACU and node devices. Typically,the cable used is two twisted-pairs with an overall shield; one pair is for data, the other pairis for DC power. While the maximum length of an S-NET branch is 4,000 feet (1200 meters),it is recommended that separate twisted-pair cables for data and power when lengths exceed500 feet (150 meters). Table 5 lists recommended cable

CrimpSleeve

PhoenixConnector

Wire


. . .


Table 5: Recommended S-NET Cable

NexWatch strongly discourages the use of drop wiring. When failures occur, it is tedious andtime-consuming to trace the fault back to a soldered drop, perhaps in an out-of-the-wayplace. If all terminations are made at a device connector, this frustrating activity is avoided.

Figure 12: S-NET Wiring

S-NET Length < 500 Feet (Data & Power)Belden 9552

2-Pair18 AWG

Belden 1069 16 AWG

S-NET Length > 500 Feet (Data Only) Belden 9841 1-Pair 24 AWG

S-NET Length > 500 Feet (Power Only)

Belden 9341

2-Conductor

18 AWG

Belden 9342 16 AWG

Belden 9343 14 AWG

DigiReader or otherS-NET Device

ACU Controller RS-485 Port

Last S-NetDevice orCable End

Maximum S-NET Length 4000 feet (1200 M)

ShieldPower

Data

TerminateTerminate

* Note the avoidance of drop wiring

**

DigiReader or otherS-NET Device


TROUBLESHOOTING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .T R O U B L E S H O O T I N G

Table 6 lists error symptoms and suggests troubleshooting actions.

Table 6: Troubleshooting

Power Faults

No LEDs illuminated

Check fuses

Check Wiring

Verify DC voltage to unit

If power is present, ACU may be offline

No communications on one portCheck port fuse

Check port wiring

No power at one or more portsCheck fuses for affected ports

Check wiring for affected ports

Communications Errors

All lights steady except on one port

Data A & B wiring may be reversed. Check wiring on port with unlit LED

Excessive data errorsCheck wiring shield connections for ground loops

Check termination resistors and jumpers


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