literature.rockwellautomation.com · if the mounting brackets of a chassis do not lay flat before...

20
P)b!ica(i$# 1771.IN075A-EN-P - Ma&ch 2002 Universal I/O Chassis (Cat. No. 1771-A1B, -A2B, -A3B, -A3B1, -A4B Series B) To install an I/O chassis you See page i"%$&(a#( )’e& i#f$&"a(i$# .......................... 1 %&e%a&e f$& i#’(a!!a(i$# ............................. 4 a!!$+ ’)fficie#( "$)#(i#g ’%ace ...................... 4 "$)#( (he I/O cha’’i’ a#d g&$)#d b)’ ................. 8 g&$)#d (he cha’’i’ ............................... 9 ’e( (he %$+e& ’)%%!, c$#fig)&a(i$# j)"%e& ............... 13 ’e( (he ’+i(che’ $# (he bac%!a#e a’’e"b!, ............. 13 %&$*ide %$+e& ($ (he I/O cha’’i’ ..................... 14 i#’(a!! I/O "$d)!e’ ................................ 16 ha-a&d$)’ !$ca(i$# a%%&$*a! ......................... 18 ’%ecifica(i$#’ ................................... 19 Because of the variety of uses for the products described in this publication, those responsible for the application and use of these products must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards. In no event will Allen–Bradley be responsible or liable for indirect or consequential damage resulting from the use or application of these products. Any illustrations, charts, sample programs, and layout examples shown in this publication are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Allen–Bradley does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication. Allen–Bradley publication SGI–1.1, Safety Guidelines for Application, Installation, and Maintenance of Solid–State Control (available from your local Allen–Bradley office), describes some important differences between solid–state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication. Installation Instructions To the Installer Important User Information

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Page 1: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

�)�!���(�$# ����.���������� � ��&�� ����

���� ��� ��� �����(Cat. No. 1771-A1B, -A2B, -A3B, -A3B1, -A4B Series B)

�� ������� �� ��� ����� ��� � ���

�"%$&(�#( )'�& �#�$&"�(�$# � � � � � � � � � � � � � � � � � � � � � � � � � � �

%&�%�&� �$& �#'(�!!�(�$# � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

�!!$+ ')������#( "$)#(�#� '%��� � � � � � � � � � � � � � � � � � � � � � �

"$)#( (�� ��� ���''�' �#� �&$)#� �)' � � � � � � � � � � � � � � � � �

�&$)#� (�� ���''�' � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

'�( (�� %$+�& ')%%!, �$#���)&�(�$# �)"%�& � � � � � � � � � � � � � � � ��

'�( (�� '+�(���' $# (�� ��� %!�#� �''�"�!, � � � � � � � � � � � � � ��

%&$*��� %$+�& ($ (�� ��� ���''�' � � � � � � � � � � � � � � � � � � � � � �

�#'(�!! ��� "$�)!�' � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � ��

��-�&�$)' !$��(�$# �%%&$*�! � � � � � � � � � � � � � � � � � � � � � � � � � �

'%�������(�$#' � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � ��

Because of the variety of uses for the products described in thispublication, those responsible for the application and use of theseproducts must satisfy themselves that all necessary steps have beentaken to assure that each application and use meets all performanceand safety requirements, including any applicable laws, regulations,codes and standards. In no event will Allen–Bradley be responsibleor liable for indirect or consequential damage resulting from the useor application of these products.

Any illustrations, charts, sample programs, and layout examplesshown in this publication are intended solely for purposes ofexample. Since there are many variables and requirements associatedwith any particular installation, Allen–Bradley does not assumeresponsibility or liability (to include intellectual property liability)for actual use based upon the examples shown in this publication.

Allen–Bradley publication SGI–1.1, Safety Guidelines forApplication, Installation, and Maintenance of Solid–State Control(available from your local Allen–Bradley office), describes someimportant differences between solid–state equipment andelectromechanical devices that should be taken into considerationwhen applying products such as those described in this publication.

Installation Instructions

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Page 2: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis2

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Reproduction of the contents of this copyrighted publication, inwhole or part, without written permission of Rockwell Automation,is prohibited.

Throughout this publication, notes may be used to make you awareof safety considerations. The following annotations and theiraccompanying statements help you to identify a potential hazard.avoid a potential hazard, and recognize the consequences of apotential hazard.

WARNING

!

Identifies information about practices orcircumstances that can cause an explosion in ahazardous environment, which may lead topersonal injury or death, property damage, oreconomic loss.

ATTENTION

!

Identifies information about practices orcircumstances that may lead to personal injuryor death, property damage, or economic loss.

IMPORTANTIdentifies information that is critical forsuccessful application and understanding of theproduct.

Page 3: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis 3

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ATTENTION

!

Environment and Enclosure

This equipment is intended for use in a PollutionDegree 2 industrial environment, in overvoltageCategory II applications (as defined in IECpublication 60664–1), at altitudes up to 2000meters without derating.

This equipment is considered Group 1, Class Aindustrial equipment according to IEC/CISPRPublication 11. Without appropriate precautions,there may be potential difficulties ensuringelectromagnetic compatibility in otherenvironments due to conducted as well asradiated disturbance.

This equipment is supplied as “open type”equipment. It must be mounted within anenclosure that is suitably designed for thosespecific environmental conditions that will bepresent, and appropriately designed to preventpersonal injury resulting from accessibility tolive parts. The interior of the enclosure must beaccessible only by the use of a tool. Subsequentsections of this publication may containadditional information regarding specificenclosure type ratings that are required to complywith certain product safety certifications.

See NEMA Standards publication 250 and IECpublication 60529, as applicable, forexplanations of the degrees of protectionprovided by different types of enclosures. Also,see the appropriate sections in this publication, aswell as the Allen–Bradley publication 1770–4.1,(“Industrial Automation Wiring and GroundingGuidelines”), for additional installationrequirements pertaining to this equipment.

Page 4: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis4

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Make sure you have these items:

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Page 5: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis 5

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Page 6: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis6

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Page 7: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis 7

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Page 8: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis8

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Each enclosure must contain a central ground bus. The ground busis the common connection for each chassis within the enclosure andthe enclosure itself. Use either bolts or welded studs to mount theI/O chassis and central ground bus. If you are mounting a chassis tothe back panel of an enclosure, use 1/4-20 (M6 x 10) mounting bolts.

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ATTENTION

!If the mounting brackets of a chassis do not layflat before the nuts are tightened, use additionalwashers as shims so that the chassis will not bewarped by tightening the nuts. Warping achassis could damage the backplane and causepoor connections.

For further information, refer to publication 1770–4.1, “IndustrialAutomation Wiring and Grounding Guidelines.”

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Page 9: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis 9

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Page 10: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis10

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Use the following information, along with the installation manual foryour programmable controller to ground the I/O chassis and your I/Omodules.

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ATTENTION

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Page 11: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis 11

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• + )$ 130$ 2'$ $,"*-130$ #--0 4($5(,& 5(,#-5 (1 * +(, 2$# 1"0$$, -0 "-,#3"2(4$ -.2(" * 13!120 2$ �2- !*-") ����

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• (,12 ** !-,#(,& 5(0$ ���++ ������� +(,(+3+� %-0 $*$"20(" * "-,2 "2!$25$$, 2'$ #--0 ,# 2'$ $,"*-130$� #- ,-2 0$*6 -, 2'$ '(,&$

IMPORTANT�- ,-2 * 6 -,$ &0-3,# *3& #(0$"2*6 -, 2-. -% 2'$ -2'$0� 2'(126.$ -% "-,,$"2(-, " , !$"-+$ *--1$ #3$ 2- "-+.0$11(-,-% 2'$ +$2 * *3&1��* "$ 2'$ %(012 *3& !$25$$, 12 0 5 1'$0 ,# ,32 5(2' " .2(4$ 12 0 5 1'$0��%2$0 2(&'2$,(,& 2'$ ,32� .* "$ 2'$ 1$"-,# *3& !$25$$, 2'$%(012 ,32 ,# 1$"-,# ,32 5(2' " .2(4$ 12 0 5 1'$0�

Connect an equipment grounding conductor directly from eachchassis to an individual bolt on the ground bus.

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Page 12: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis12

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The grounding-electrode system is at earth-ground potential and isthe central ground for all electrical equipment and ac power withinany facility. Use a grounding-electrode conductor to connect theground bus to the grounding-electrode system. Use at minimum 8AWG copper wire for the grounding-electrode conductor to guardagainst EMI. The National Electrical Code specifies safetyrequirements for the grounding-electrode conductor.

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Certain connections require shielded cables to help reduce the effectsof electrical noise coupling. Ground each shield at one end only. Ashield grounded at both ends forms a ground loop which could causefaulty PLC-5 processor operation.

Ground each shield at the end specified in the appropriatepublication for the product.

Avoid breaking shields at junction boxes. Many types of connectorsfor shielded conductors are available from various manufacturers. Ifyou do break a shield at a junction box:

• connect only category-2 conductors in the junction box

• do not strip the shield back any further than necessary to make aconnection

• connect the shields of the two cable segments to ensure continuityalong the entire length of the cable

For more information about grounding the chassis, see IndustrialAutomation Wiring and Grounding Guidelines (publication1770-4.1).

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Universal I/O Chassis 13

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Set the power supply configuration jumper according to the powersupply you are using.

ATTENTION

!If you do not properly configure the power supply configuration jumper, theprocessor will fail.

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IMPORTANTYou cannot power a single I/O chassis with botha power-supply module and an external powersupply.

Use the installation manual for your programmable controller or adapter module to set the switches.

ATTENTION

!If you do not properly configure the backplaneswitch assembly, various system failures mayoccur.

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Page 14: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis14

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Your I/O chassis can receive power through:

• processors with integral power supplies that provide 2-4A

• power-supply modules that provide 3-8A

• external power supplies that provide 6.5-16A (external power supplies are not designed for parallel operation)

Power-supply modules are designed for parallel operation using1771–CT cables. See your power supply installation documentation(1771 I/O Chassis and Power Supplies product data, publication1771–2.185) for possible configurations.

IMPORTANTThe 1772-LSP, -LWP, -LXP, and -LZP processormodules already contain a power supply so youcan only parallel one additional power-supplymodule with these processor modules.

ATTENTION

!Do not connect an external power supply and a power-supply module to the same I/Ochassis; they are incompatible.

WARNING

!If you insert or remove any module or powersupply while backplane power is on, anelectrical arc can occur. This could cause anexplosion in hazardous location installations. Besure power is removed or the area isnonhazardous before proceeding.

!WARNING

If you connect or disconnect any cable or wiringwith power applied to this module or the deviceon the other end of the cable or wire, anelectrical arc can occur. This could cause anexplosion in hazardous location installations. Besure power is removed or the area isnonhazardous before proceeding.

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Page 15: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis 15

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The I/O chassis has two power connectors. You connect the externalpower supply or power supply chassis (1771-PSC) to the I/O chassisusing these connectors and the appropriate power supply cables.

IMPORTANTUse the installation data for your power supplyor power supply chassis (1771 I/O Chassis andPower Supplies product data, publication1771–2.185) to properly mount it to your I/Ochassis.

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Page 16: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

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Universal I/O Chassis16

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The left-most slot of each chassis accepts either a processor module oran I/O adapter module. The other slots in the chassis acceptcommunication modules, I/0 modules and power-supply modules.

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To insert a module:

1. Pull the locking-bar pins to release the locking bar and swing itup.

2. Use the installation data/user manual for your module to:

a. position the keying bands in the backplane connectors tocorrespond to the key slots on the module. This preventsyou from inserting the wrong module in this slot.

ATTENTION

!Observe the following precautions wheninserting or removing keys:

� insert or remove keys with your fingers

� make sure that key placement is correct

Incorrect keying or the use of a tool can resultin damage to the backplane connector andpossible system faults.

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b. install the module.

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Page 17: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis 17

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IMPORTANTFirmly press the module into the chassisbackplane connector. The chassis locking barwill not close if any modules are not seatedproperly.Repeat for each module you install.

3. Swing the chassis locking bar down into place to secure themodules. Make sure the locking pins engage.

4. Apply the I/O group labels over the scored lines on the I/Ochassis locking bar as shown below. On each label, record theI/O rack number, I/O group number and terminal numbering foreach module.

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5. Use your module’s installation data to make other wiringconnections.

6. Apply power to the system and run tests as required.

Page 18: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis18

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• �% 3'(2 /1.#4"3 ".-3 (-2 ! 33$1($2� 3'$8 ,423 .-+8 !$ "' -&$# (- - 1$ *-.6- 3. !$ -.-' 9 1#.42�

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Page 19: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis 19

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Page 20: literature.rockwellautomation.com · If the mounting brackets of a chassis do not lay flat before the nuts are tightened, use additional washers as shims so that the chassis will

Universal I/O Chassis20

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