1756-5.2, ControlLogix Chassis, Installation Instructions

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ControlLogix ChassisInstallationInstructions1 (Catalog Numbers 1756-A4,-A7, -A10)Prepare for InstallationMake sure you have these items. M4 or M5 (#10 or #12) mounting tab screws andwashersUse this publication as a guide when installinga ControlLogixt chassis.To install the chassisPrepare for InstallationSee page1Allow Sufficient Mounting Space4Install Your Chassis4Ground Your Chassis7Install Your I/O Modules and Attach YourPower SupplyFor this reference informationCompliance to European Union Directives11See page3Mounting Dimensions11CSA Hazardous Location Approval14Chassis Specifications17For eachtop mounting tabbottom mounting tabYou need1 phillips screw, 1 flat washer1 split lock-washer1 phillips screw and 1 star washeror 1 SEM screw11 Phillips screw with attached star washer.This chassis1756-A4, -A71756-A10Number of mounting tabs2 top2 bottom3 top3 bottom phillips screwdriver drill documentation for your ControlLogix modulesthat will be placed in the chassisPublication 1756-5.2 — August 1997

2ControlLogix Chassis!ATTENTION: Electrostaticdischarge can damage integratedcircuits or semiconductors if youtouch backplane connector pins.Follow these guidelines when youhandle the 1756-PA72 or 1756-PB72.S Touch a grounded object todischarge static potential.S Do not touch the backplaneconnector or connector pins.S Do not touch circuit componentsinside the power supply.S If available, use a static-safe workstation.S When not in use, keep the powersupply in its static-shieldpackaging.Publication 1756-5.2 — August 1997

ControlLogix Chassis3Compliance to European Union DirectivesLow Voltage DirectiveIf this product bears themarking it isapproved for installation within the European Unionand EEA regions. It has been designed and tested tomeet the following directives.This product is also designed to meet CouncilDirective 73/23/EEC Low Voltage, by applying thesafety requirements of EN 61131–2 ProgrammableControllers, Part 2 – Equipment Requirementsand Tests.ÓÓÓÓÓÓÓÓEMC DirectiveThis apparatus is tested to meet Council Directive89/336/EEC Electromagnetic Compatibility (EMC)using a technical construction file and the followingstandards, in whole or in part: EN 50081-2 EMC – Generic EmissionStandard, Part 2 – Industrial Environment EN 50082-2 EMC – Generic ImmunityStandard, Part 2 – Industrial EnvironmentThe product described in this document is intendedfor use in an industrial environment.For specific information required by EN 61131-2,see the appropriate sections in this publication, aswell as the following Allen-Bradley publications: Industrial Automation Wiring and GroundingGuidelines, publication 1770-4.1 Guidelines for Handling Lithium Batteries,publication AG-5.4 Automation Systems Catalog, publication B111This equipment is classified as open equipment andmust be installed (mounted) in an enclosure duringoperation as a means of providing safety protection.Publication 1756-5.2 — August 1997

4ControlLogix ChassisAllow Sufficient Mounting SpaceMinimum Cabinet SizeImportant:Important:Make sure you meet these minimumspacing requirements. 15.3 cm(6.0 in)Enclosure allow 15.3 to 20 cm (6.0 to 8.0 in)Chassis1756-A4between chassis and heat source1756-A7 allow 5.1 cm (2.0 in) between 10.2 cm(4.0 in)15.3 to 20 cm(6.0 to 8.0 in)wireway and top or bottom of chassis1756-A10To meet the UL/CSA standards, do notexceed these minimum cabinet sizerequirements.Minimum Cabinet Size (W x H x D)50.7 x 50.7 x 20.3 cm20 x 20 x 8 in50.7 x 70 x 20.3 cm20 x 24 x 8 in76.1 x 50.7 x 20.3 cm30 x 20 x 8 inInstall Your Chassis 15.3 cm(6.0 in)7.7 to 10.2 cm(3.0 to 4.0 in) 10.2 cm(4.0 in)20230a–MPublication 1756-5.2 — August 1997!ATTENTION: Do not drill holes fora chassis above an installed chassis.Metal chips from drilling candamage the backplane and causeintermittent operation.

5ControlLogix Chassis1. Drill holes in the back panel of the enclosure forchassis mounting tabs. See Mounting Dimensions,on page 11, for assistance in hole placement.3. Slide the chassis over the installed screws andtighten them.2028820289-M2. Install the hardware for the top mounting tabs.M4 or M5 (#10 or #12) phillips screw,flat washer and split lock-washer!Scrape paint off the back panel for an electricalconnection between the chassis and back panel.20288ATTENTION: If the chassismounting tabs do not lay flatbefore the screws are tightened, useadditional washers as shims so thechassis is not warped by tighteningthe screws.Warping a chassis could damagethe backplane and causeintermittent operation.Publication 1756-5.2 — August 1997

6ControlLogix Chassis4. Leaving the far-left bottom tab open forfunctional ground, install the remainingtab screw(s).20290-MPublication 1756-5.2 — August 1997

7ControlLogix ChassisGround Your ChassisKeep wire lengths as short as possible.To properly ground your I/O chassisverify grounding configurationinstall a central ground busconnect functional groundconnect safety groundconnect equipment grounding conductor to ground busconnect ground bus to grounding-electrode systemSee page78891011Verify Grounding ConfigurationThis figure shows you how to run functional andsafety ground connections from the chassis andpower supply to the ground bus. We recommendusing a ground bus because it reduces the electricalresistance at the connection.For more information on installing andconnecting safety ground to the ControlLogixpower supply, refer to the ControlLogix PowerSupplies Installation Instructions, publication1756-5.1.Earth Ground20231a–MPublication 1756-5.2 — August 1997

8ControlLogix ChassisInstall a Central Ground BusFunctional Ground ConnectionEach enclosure must contain a central ground bus.The ground bus is the common connection foreach chassis within the enclosure and theenclosure itself.Keep wire lengthas short as possible.For more information on installing a centralground bus, refer to the Industrial AutomationWiring and Grounding Guidelines,publication 1770-4.1.M4 or M5 (#10 or #12)flat or star washerConnect Functional GroundUse the following figure to connect functionalground to the chassis.chassis mounting tabEquipment groundingconductor (ground lug with8.3 mm2 (8 AWG) wire)Publication 1756-5.2 — August 1997M4 or M5 (#10 or #12)phillips screwand flat or star washer(or SEM screw)To ground bus20291-M

9ControlLogix ChassisConnect Safety GroundSafety Ground ConnectionUse the following figure to connect safety groundto the chassis.Important:Tighten the nut on the safety groundterminal stud to a torque of 12inch-pounds.Safety groundterminal studTo ground busStationary nutEquipment groundingconductor ground lugwith 2.1 mm2 (14 AWG)wire to ground busNut with captivestar washer30188Publication 1756-5.2 — August 1997

10ControlLogix ChassisConnect the Equipment Grounding Conductorsto the Ground BusConnect the equipment grounding conductors(functional and safety ground) directly from eachchassis to an individual bolt on the ground bus.Important:Do not lay one ground lug directly ontop of the other; this connection canbecome loose due to compression ofthe metal lugs. Place the first lugbetween a star washer and a nut with acaptive star washer. After tighteningthe nut, place the second lug betweenthe first nut and a second nut with acaptive star washer.ground bus mountingequipmentgroundingconductorsground lugbolttapped holeflat orstar washerGrounding-electrode conductor to grounding-electrodesystem13271Functional Ground use 2.54 cm (1 in) thick copper braid or 8.3 mm2 (8 AWG)copper wire to connect equipment grounding conductor foreach chassis, the enclosure, and a central ground busmounted on the back-panelSafety Ground Publication 1756-5.2 — August 1997ground bususe a 2.1 mm2 (14 AWG) copper wire for the equipmentgrounding conductorsuse a steel enclosure to guard against electromagneticinterference (EMI)make sure the enclosure door viewing window is alaminated screen or a conductive optical substrate (to blockEMI)install a bonding wire for electrical contact between thedoor and the enclosure; do not rely on the hinge

11ControlLogix ChassisConnect Ground Bus toGrounding-Electrode SystemThe grounding-electrode system is at earth-groundpotential and is the central ground for all electricalequipment and ac power within any facility. Use agrounding-electrode conductor to connect theground bus to the grounding-electrode system.Use at minimum 8.3 mm2 (8 AWG) copper wirefor the grounding-electrode conductor to guardagainst EMI. The National Electrical Codespecifies safety requirements for thegrounding-electrode conductor.Install Your Modules and Attach YourPower SupplyUse the installation instructions/user manuals foryour modules to install them in the chassis.Use the installation instructions for your powersupply to attach it to your chassis.Mounting DimensionsFor dimensions ofright side of all chassis1756-A4,1756-A7, -A10See page121213Publication 1756-5.2 — August 1997

12ControlLogix Chassisright-side view of all chassis16.9 cm(6.65 in)14.5 cm(5.8 in)1756-A4 with power supplyinstalled (1756-PA72 or -PB72)1.1 cm Dia.(0.433 in)7.0 cm(2.76 in)16.9 cm(6.65 in)13.7 cm(5.39 in)15.8 cm(6.22 in)0.55 cm Dia(0.217 in)Publication 1756-5.2 — August 19970.55 cm Dia(0.217 in)4.5 cm(1.77 in)26.3 cm(10.35 in)1.2 cm(0.472 in)

13ControlLogix Chassis1756-A7 with power supplyinstalled (1756-PA72 or -PB72)1.1 cm Dia.(0.433 in).55 cm Dia(0.217 in)17.5 cm(6.89 in)16.9 cm(6.65 in)13.7 cm(5.39 in)15.8 cm(6.22 in)0.55 cm Dia(0.217 in)1756-A10 with powersupply installed(1756-PA72 or -PB72)1.1 cm Dia.(0.433 in)36.8 cm(14.49 in)0.55 cm Dia(0.217 in)4.5 cm(1.77 in)14.0 cm(5.51 in)1.2 cm(0.472 in)5.5 cm(2.17 in)16.9 cm(6.65 in)15.8 cm(6.22 in)13.7 cm(5.39 in)0.55 cm Dia(0.217 in)14.0 cm(5.51 in)48.3 cm(19.02 in)1.2 cm(0.472 in)Publication 1756-5.2 — August 1997

14ControlLogix ChassisImportant:CSA Hazardous Location ApprovalCSA certifies products Example CSA certification product labelfor general use as wellas for use in hazardousIlocations.Due to the modular nature of a PLC control system,the product with the highest temperature ratingdetermines the overall temperature code rating of aPLC control system in a Class I, Division 2 location.The temperature code rating is marked on the productlabel (shown below).Temperature Code Rating12364-IActual CSA certification is indicated by the product labeland not by statements in any user documentation.To comply with CSA certification for use in hazardous locations, thefollowing information becomes a part of the product literature forCSA-certified Allen-Bradley industrial control products. This equipment is suitable for use in Class I, Division 2, Groups A, B, C,D, or non-hazardous locations only. The products having the appropriate CSA markings (i.e., Class IDivision 2, Groups A, B, C, D), are certified for use in other equipmentwhere the suitability of combination (i.e., application or use) isdetermined by the CSA or the local inspection office having jurisdiction.Publication 1756-5.2 — August 1997ILook for temperaturecode rating here.12365-I

ControlLogix ChassisThe following warnings apply to products having CSA certification foruse in hazardous locations.ATTENTION: Explosion hazard—! Substitution of components may impair suitabilityfor Class I, Division 2. Do not replace components unless power hasbeen switched off or the area is known to benon-hazardous. Do not disconnect equipment unless power hasbeen switched off or the area is known to benon-hazardous. Do not disconnect connectors unless power hasbeen switched off or the area is known to benon-hazardous. Secure any user-suppliedconnectors that mate to external circuits on anAllen-Bradley product using screws, slidinglatches, threaded connectors, or other meanssuch that any connection can withstand a 15Newton (3.4 lb.) separating force applied for aminimum of one minute.15Approbation d’utilisation dans des emplacementsdangereux par la CSALa CSA certifie les produits Exemple d’étiquette de certificationd’utilisation générale aussi d’un produit par la CSAbien que ceux quiIs’utilisent dans desemplacements dangereux.La certification CSA en vigueur est indiquée par l’étiquette du12364-Iproduit et non par des affirmations dans la documentation à l’usagedes utilisateurs.Pour satisfaire à la certification de la CSA dans des endroits dangereux,les informations suivantes font partie intégrante de la documentationdes produits industriels de contrôle Allen-Bradley certifiés par la CSA. Cet équipement convient à l’utilisation dans des emplacements deClasse I, Division 2, Groupes A, B, C, D, ou ne convient qu’àl’utilisation dans des endroits non dangereux. Les produits portant le marquage approprié de la CSA (c’est à dire,Classe I, Division 2, Groupes A, B, C, D) sont certifiés à l’utilisationpour d’autres équipements où la convenance de combinaison(application ou utilisation) est déterminée par la CSA ou le bureaulocal d’inspection qualifié.Publication 1756-5.2 — August 1997

16Important:ControlLogix ChassisPar suite de la nature modulaire du système decontrôle PLC , le produit ayant le taux le plus élevéde température détermine le taux d’ensemble du codede température du système de contrôle d’un PLCdans un emplacement de Classe I, Division 2. Le tauxdu code de température est indiqué sur l’étiquette duproduit.Taux du code de températureILe taux du code detempérature est indiqué ici12365-IPublication 1756-5.2 — August 1997Les avertissements suivants s’appliquent aux produits ayantla certification CSA pour leur utilisation dans des emplacementsdangereux.!AVERTISSEMENT: Risque d’explosion — La substitution de composants peut rendre cematériel inacceptable pour les emplacements deClasse I, Division 2. Couper le courant ou s’assurer que l’emplacementest désigné non dangereux avant de remplacer lescomposants. Avant de débrancher l’équipement, couper lecourant ou s’assurer que l’emplacement estdésigné non dangereux. Avant de débrancher les connecteurs, couper lecourant ou s’assurer que l’emplacement estreconnu non dangereux. Attacher tous connecteursfournis par l’utilisateur et reliés aux circuitsexternes d’un appareil Allen-Bradley à l ’aide devis, loquets coulissants, connecteurs filetés ouautres moyens permettant aux connexions derésister à une force de séparation de 15 newtons(3,4 lb. - 1,5 kg) appliquée pendant au moins uneminute.

ControlLogix Chassis17Specificationsdimensions (with tabs)WxHxD1756-A417.7 x 16.9 x 14.5 cm(7.1 x 6.65 x 5.8 in)1756-A728.2 x 16.9 x 14.5 cm(11.3 x 6.65 x 5.8 in)1756-A1039.7 x 16.9 x 14.5 cm(15.9 x 6.65 x 5.8 in)minimum cabinet sizeWxHxD50.7 x 50.7 x 20.3 cm20 x 20 x 8 in50.7 x 70 x 20.3 cm20 x 24 x 8 in76.1 x 50.7 x 20.3 cm30 x 20 x 8 inapproximate weight(without modules)0.75 kg (1.7 lbs)1.1 kg (2.4 lbs)1.45 kg (3.2 lbs)module slots4710all chassis1maximum backplane current3.3 V dc @ 4.0 A5.1 V dc @ 10.0 A;24 V dc @ 2.5 Atype of mountpanel mountoperating conditionoperating temperature: 0o to 60oC (32o to 140oF)storage temperature: –40o to 85oC (–40o to 185oF)relative humidity: 5 to 95% (without condensation)agency certification(when product or packaging is marked)ÓÓÓÓÓÓÓÓÓÓClass I Div 2 hazardous1Class I Div 2 hazardous1marked for all applicable directivesCSA certification – Class I, Division 2, Group A, B, C, D or nonhazardous locations.FM approved – Class I, Division 2, Group A, B, C, D or nonhazardous locations.Publication 1756-5.2 — August 1997

18ControlLogix ChassisAllen–Bradley, ControlLogix and PLC are trademarks of Rockwell Automation.CSA logo is a registered trademark of the Canadian Standards AssociationLe sigle CSA est la marque déposée de l’Association des Standards pour le Canada.Allen–Bradley, ControlLogix, et PLC sont des marques déposées de Allen-Bradley Company, Inc.Allen-Bradley, a Rockwell Automation Business, has been helping its customers improve productivity and quality for more than 90 years. We design, manufacture and support a broad rangeof automation products worldwide. They include logic processors, power and motion controldevices, operator interfaces, sensors and a variety of software. Rockwell is one of the world’sleading technology companies.Worldwide representation.Argentina Australia Austria Bahrain Belgium Brazil Bulgaria Canada Chile China, PRC Colombia Costa Rica Croatia Cyprus Czech Republic Denmark Ecuador Egypt El Salvador Finland France Germany Greece Guatemala Honduras Hong Kong Hungary Iceland India Indonesia Ireland Israel Italy Jamaica Japan Jordan Korea Kuwait Lebanon Malaysia Mexico Netherlands New Zealand Norway Pakistan Peru Philippines Poland Portugal Puerto Rico Qatar Romania Russia–CIS Saudi Arabia Singapore Slovakia Slovenia South Africa, Republic Spain Sweden Switzerland Taiwan Thailand Turkey United Arab Emirates United Kingdom United States Uruguay Venezuela YugoslaviaAllen-Bradley Headquarters, 1201 South Second Street, Milwaukee, WI 53204 USA, Tel: (1) 414 382-2000 Fax: (1) 414 382-4444Publication 1756-5.2 — August 1997Publication 1756-5.2 — August 1997PN 955129-85Copyright 1997 Rockwell International Corporation. Printed in USA

ControlLogix Chassis 1 Publication 1756-5.2 — August 1997 (Catalog Numbers 1756-A4, -A7, -A10) Use this publication as a guide when installing a ControlLogix chassis. To install the chassis See page Prepare for Installation 1 . Controllers, Part 2 – Equipment Requirements

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