Rockwell Automation 1756-xxxx Installation Instructions
Installation Instructions
ControlLogix Chassis and Power Supply
Standard Chassis Catalog Numbers 1756-A4, 1756-A10, 1756-A13, 1756-A17
ControlLogix-XT Chassis Catalog Numbers 1756-A4LXT, 1756-A5XT, 1756-A7XLT, 1756-A7XT
Standard Power Supplies Catalog Numbers 1756-PA72, 1756-PA75, 1756-PB72, 1756-PB75, 1756-PC75, 1756-PH75
ControlLogix-XT Power Supplies Catalog Numbers 1756-PAXT, 1756-PBXT
Redundant Power Supplies Catalog Numbers 1756-PA75R, 1756-PB75R
Redundant Power Supplies Chassis Adapter Catalog Number 1756-PSCA2
ControlLogix-XT Redundant Power Supplies Catalog Numbers 1756-PAXTR, 1756-PBXTR
ControlLogix-XT Redundant Power Supplies Chassis Adapter Catalog Number 1756-PSCA2XT
Important User Information
IMPORTANT
Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,
and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required
to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the
use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property
damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
Identifies information that is critical for successful application and understanding of the product.
Labels may also be on or inside the equipment to provide specific precautions.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).
Allen-Bradley, Rockwell Software, Rockwell Automation, ControlLogix, ControlLogix-XT, and FLEX I/O-XT are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
Summary of Changes
This manual contains new and updated information. Changes throughout this
revision are marked by change bars, as shown to the right of this paragraph.
New and Updated
Information
The following components were added to these installation instructions.
• ControlLogix-XT Redundant Power Supply (catalog number
1756-PAXTR)
• ControlLogix-XT Redundant Power Supply (catalog number
1756-PBXTR)
• ControlLogix-XT Redundant Power Supply Chassis Adapter (catalog
number 1756-PSCA2XT)
Rockwell Automation Publication 1756-IN005C-EN-P - March 2014 3
Summary of Changes
Notes:
4 Rockwell Automation Publication 1756-IN005C-EN-P - March 2014
Table of Contents
Preface
Install Chassis and Power Supplies
Standard ControlLogix Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ControlLogix-XT Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Where to Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Installation Advisories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 1
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Parts Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Follow These Steps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Plan the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Supply and Chassis Compatibility . . . . . . . . . . . . . . . . . . . . . . . 15
Minimum Cabinet Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Spacing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Mounting Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Install the Chassis and Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Ground the Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Install a Central Ground Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Connect the Functional Earth Ground on the Chassis. . . . . . . . . . . 24
Connect the Protective Earth Ground . . . . . . . . . . . . . . . . . . . . . . . . . 25
Connect the Grounding Conductors to the Ground Bus . . . . . . . . 26
Connect Ground Bus to Grounding-electrode System . . . . . . . . . . . 26
Connect the Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Remove the Protective Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Apply Power to the Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Input Power Requirements and Transformer Sizing. . . . . . . . . . . . . . . . . 29
Troubleshoot the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Install Chassis and Redundant Power
Supplies
Rockwell Automation Publication 1756-IN005C-EN-P - March 2014 5
Chapter 2
Redundant Power Supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Components of the Redundant System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Parts Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Follow These Steps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Plan the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Redundant Power Supply and Chassis Compatibility. . . . . . . . . . . . 35
Spacing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Mounting Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
System Configuration Recommendations . . . . . . . . . . . . . . . . . . . . . . 41
Install the Chassis and Chassis Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Install the Redundant Power Supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Ground the Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Install a Central Ground Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Connect the Functional Earth Ground on the Chassis. . . . . . . . . . . 46
Table of Contents
Connect the Protective Earth Ground on the Chassis
and Redundant Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Connect the Grounding Conductors to the Ground Bus. . . . . . . . . 48
Connect Ground Bus to Grounding-electrode System . . . . . . . . . . . 48
Connect the Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Connect the 1756-CPR2 Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Connect Power to the Redundant Power Supply . . . . . . . . . . . . . . . . 49
Connect the Solid-state Relay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Remove the Protective Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Apply Power to the Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Input Power Requirements and Transformer Sizing . . . . . . . . . . . . . . . . . 53
Troubleshoot the Redundant Power Supplies . . . . . . . . . . . . . . . . . . . . . . . 54
Chassis Adapter Status Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Remove or Replace a Redundant Power Supply . . . . . . . . . . . . . . . . . . . . . 55
Remove a Redundant Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Replace a Redundant Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Remove or Replace a Chassis Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Remove a Chassis Adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Replace a Chassis Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
6 Rockwell Automation Publication 1756-IN005C-EN-P - March 2014
Preface
Standard ControlLogix Systems
ControlLogix-XT Systems
The ControlLogix system is a modular system that requires a 1756 I/O chassis
that houses various modules. Chassis are available with 4, 7, 10, 13, and 17 slots
for standard applications where temperatures range from 0…60 °C
(32…140 °F). You can place any module into any slot.
The chassis backplane provides the following features:
• A high-speed communication path between modules
• Power distribution to each module housed in the chassis
• Messages passed between multiple controllers housed in the chassis
• Messages passed between and through multiple communication-interface
modules housed on the chassis
The ControlLogix-XT products include power, control, and communication
system components that, when used with FLEX I/O-XT™ products, provide a
complete control system solution that can be used in environments where
temperatures range from -20…70 °C (-4…158 °F). Chassis are available with 4, 5,
and 7 slots.
When used independently, ControlLogix-XT systems can withstand
environments where temperatures range from -25…70 °C (-13…158 °F) for
equipment designated as ‘XT’ and -25…60 °C (-13…140 °F) for equipment
designated ‘LXT’.
These installation instructions describe how to install the following components
of a ControlLogix system:
• Standard ControlLogix chassis
• Standard ControlLogix power supplies
• ControlLogix-XT™ chassis
• ControlLogix-XT power supplies
• ControlLogix redundant power supplies
• ControlLogix chassis adapters
Rockwell Automation Publication 1756-IN005C-EN-P - March 2014 7
Preface
Are you using a Standard
ControlLog ix,
ControlLogix-XT or
ControlLogix w ith
Redundant Power Supply
System?
Standard
Control Logix
System
ControlLog ix-XT
System
ControlLogix with
Redundant Power
Supply System
Install Chassis and Power
Supplies
Install Chassis and Redundant
Power Sup plies
page 31
page 13
Where to Start
Use the Where to Start chart below to determine the steps to follow.
8 Rockwell Automation Publication 1756-IN005C-EN-P - March 2014
Installation Advisories
IMPORTANT
ATTENTION: Environment and Enclosure
This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined
in IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is not intended for use in residential environments and may not provide adequate protection to radio communication
services in such environments.
This equipment is supplied as open-type equipment. It must be mounted within an enclosure that is suitably designed for those
specific environmental conditions that will be present and appropriately designed to prevent personal injury resulting from
accessibility to live parts. The enclosure must have suitable flame-retardant properties to prevent or minimize the spread of flame,
complying with a flame spread rating of 5VA or be approved for the application if nonmetallic. The interior of the enclosure must be
accessible only by the use of a tool. Subsequent sections of this publication may contain additional information regarding specific
enclosure type ratings that are required to comply with certain product safety certifications.
In addition to this publication, see the following:
• Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1
• NEMA 250 and IEC 60529, as applicable, for explanations of the degrees of protection provided by enclosures
Preface
, for additional installation requirements
ATTENTION: Prevent Electrostatic Discharge
This equipment is sensitive to electrostatic discharge, which can cause internal damage and affect normal operation. Follow these
guidelines when you handle this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in use.
ControlLogix-XT system components are rated for extreme environmental conditions only when used properly with
other Logix-XT system components. The use of ControlLogix-XT components with standard ControlLogix system
components nullifies extreme-environment ratings.
If a ControlLogix-XT module is used with standard ControlLogix products, the ControlLogix-XT module can withstand only the
environments specified for the standard ControlLogix version of the module. For example, if a 1756-L63XT controller is used in a
standard 1756-A10 chassis, the ControlLogix-XT controller can withstand only the environment specified for the standard
1756-L63 controller.
The ControlLogix-XT system components are designed to meet the same and greater operational and environmental requirements
as traditional ControlLogix products.
When a ControlLogix-XT component is used as a replacement for a traditional ControlLogix component, the functional and
environmental requirements of the traditional ControlLogix component apply, with the exception of the power output ratings.
ATTENTION: If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment
may be impaired.
Rockwell Automation Publication 1756-IN005C-EN-P - March 2014 9
Preface
European Hazardous Location Approval
The following applies when the product bears the Ex Marking.
This equipment is intended for use in potentially explosive atmospheres as defined by European Union Directive 94/9/EC and has been found to
comply with the Essential Health and Safety Requirements relating to the design and construction of Category 3 equipment intended for use in
Zone 2 potentially explosive atmospheres, given in Annex II to this Directive.
Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 60079-15 and EN 60079-0.
ATTENTION: This equipment is not resistant to sunlight or other sources of UV radiation.
WARNING:
• This equipment shall be mounted in an ATEX-certified enclosure with a minimum ingress protection rating of at least IP54 (as
defined in IEC60529) and used in an environment of not more than Pollution Degree 2 (as defined in IEC 60664-1) when
applied in Zone 2 environments. The enclosure must have a tool-removable cover or door.
• Provision shall be made to prevent the rated voltage from being exceeded by transient disturbances of more than 140% of the
rated voltage when applied in Zone 2 environments.
• This equipment must be used only with ATEX certified Rockwell Automation backplanes.
• Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or other
means provided with this product.
• Do not disconnect equipment unless power has been removed or the area is known to be nonhazardous.
North American Hazardous Location Approval
The following information applies when operating this equipment
in hazardous locations.
Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for use in Class I
Division 2 Groups A, B, C, D, Hazardous Locations and nonhazardous locations
only. Each product is supplied with markings on the rating nameplate
indicating the hazardous location temperature code. When combining
products within a system, the most adverse temperature code (lowest "T"
number) may be used to help determine the overall temperature code of the
system. Combinations of equipment in your system are subject to
investigation by the local Authority Having Jurisdiction at the time of
installation.
WARNING: EXPLOSION HAZARD -
• Do not disconnect equipment unless power has been
removed or the area is known to be nonhazardous.
• Do not disconnec t connections to this equipment unless
power has been removed or the area is known to be
nonhazardous. Secure any external connections that
mate to this equipment by using screws, sliding latches,
threaded connectors, or other means provided with this
product.
• Substitution of components may impair suitability for
Class I, Division 2.
• If this product contains batteries, they must only be
changed in an area known to be nonhazardous.
Informations sur l’utilisation de cet équipement en
environnements dangereux.
Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne conviennent qu'à une
utilisation en environnements de Classe I Division 2 Groupes A, B, C, D
dangereux et non dangereux. Chaque produit est livré avec des marquages
sur sa plaque d'identification qui indiquent le code de température pour les
environnements dangereux. Lorsque plusieurs produits sont combinés dans
un système, le code de température le plus défavorable (code de
température le plus faible) peut être utilisé pour déterminer le code de
température global du système. Les combinaisons d'équipements dans le
système sont sujettes à inspection par les autorités locales qualifiées au
moment de l'installation.
AVERTISSEMENT: RISQUE D’EXPLOSION –
• Couper le courant ou s'assurer que l'environnement est
classé non dangereux avant de débrancher
l'équipement.
• Couper le courant ou s'assurer que l'environnement est
classé non dangereux avant de débrancher les
connecteurs. Fixer tous les connecteurs externes reliés à
cet équipement à l'aide de vis, loquets coulissants,
connecteurs filetés ou autres moyens fournis avec ce
produit.
• La substitution de composants peut rendre cet
équipement inadapté à une utilisation en
environnement de Classe I, Division 2.
• S'assurer que l'environnement est classé non dangereux
avant de changer les piles.
10 Rockwell Automation Publication 1756-IN005C-EN-P - March 2014
Preface
Additional Resources
These documents contain additional information concerning related products
from Rockwell Automation.
Resource Description
ControlLogix Selection Guide,
publication 1756-SG001
ControlLogix Chassis Specifications Technical Data,
publication 1756-TD006
ControlLogix Power Supplies Specifications Technical Data,
publication 1756-TD005
ControlLogix System User Manual,
publication 1756-UM001
Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1
Product Certifications website, http://www.ab.com Provides declarations of conformity, certificates, and
Provides overview of the ControlLogix system and its
products.
Provides technical specifications for ControlLogix
chassis.
Provides technical specifications for ControlLogix power
supplies.
Provides information on how to install, configure,
program, and use ControlLogix controllers.
Provides general guidelines for installing a
Rockwell Automati on® industrial system.
other certification details.
You can view or download publications at
http:/www.rockwellautomation.com/literature/
. To order paper copies of
technical documentation, contact your local Allen-Bradley distributor or
Rockwell Automation sales representative.
Rockwell Automation Publication 1756-IN005C-EN-P - March 2014 11
Preface
12 Rockwell Automation Publication 1756-IN005C-EN-P - March 2014
Chapter 1
Install Chassis and Power Supplies
This chapter describes how to install standard and ControlLogix-XT versions of
the 1756 chassis with nonredundant power supplies.
Tools Required
Parts Required
When installing either the standard or ControlLogix-XT versions of your 1756
chassis and power supplies, the following items are required:
• 3.18 mm (0.125 in.) slotted screwdriver
• 6.35 mm (0.25 in.) slotted or #2 Phillips screwdriver
• Torque screwdriver
• Needle-nose pliers
• Crimping tool
• Wire-stripping tool
• Drill
Use these tables to determine the parts required to install your chassis. These
parts are not included with the chassis and must be ordered separately.
Table 1 - Parts Required Per Mounting Tab
Tab Position With SEM Screws
Top • 1 Phillips screw
• 1 flat washer
• 1 split-lock washer
Bottom 1 SEM screw • 1 Phillips screw
(1)
Without SEM Screws
N/A
• 1 star washer
(1) Phillips screw with attached star washer.
Table 2 - Total Parts Required Per Chassis
Chassis Number of
1756-A4, 1756-A7,
1756-A4LXT, 1756-A7LXT
1756-A10,
1756-A5XT, 1756-A7XT
Rockwell Automation Publication 1756-IN005C-EN-P - March 2014 13
Mounting Tabs
2 top
2 bottom
3 top
3 bottom
Total Parts Required Per Chassis
With SEM Screws Without SEM Screws
• 2 Phillips screws
• 2 flat washers
• 2 split-lock washers
• 2 SEM screws
• 3 Phillips screws
• 3 flat washers
• 3 split-lock washers
• 3 SEM screws
• 4 Phillips screws
• 2 flat washers
• 2 split-lock washers
• 2 star washers
• 6 Phillips screws
• 3 flat washers
• 3 split-lock washers
• 3 star washers
Chapter 1 Install Chassis and Power Supplies
Plan the System
page 15
Install the Chassis and
Power Supply
page 21
Ground the Chassis
page 23
Connect the Power
page 27
Remove the Protective Label
page 28
Apply Power to the Chassis
page 28
Table 2 - Total Parts Required Per Chassis
Follow These Steps
Chassis Number of
Mounting Tabs
1756-A13 4 top
4 bottom
1756-A17 5 top
5 bottom
Total Parts Required Per Chassis
With SEM Screws Without SEM Screws
• 4 Phillips screws
• 4 flat washers
• 4 split-lock washers
• 4 SEM screws
• 5 Phillips screws
• 5 flat washers
• 5 split-lock washers
• 5 SEM screws
• 8 Phillips screws
• 4 flat washers
• 4 split-lock washers
• 4 star washers
• 10 Phillips screws
• 5 flat washers
• 5 split-lock washers
• 5 star washers
14 Rockwell Automation Publication 1756-IN005C-EN-P - March 2014
Install Chassis and Power Supplies Chapter 1
IMPORTANT
Plan the System
Use the following information to assist you in planning your system.
Power Supply and Chassis Compatibility
The chassis series you have determines the power supply you can use. The
following table lists the chassis that can be installed with each power supply.
Table 3 - Chassis Compatibility
Power Suppl y Cat. No. Chassis Cat. No.
1756-PA72/C 1756-A4/A, 1756-A7/A, 1756-A10/A, 1756-A13/A, 1756-A17/A,
1756-PB72/C
1756-PA75/B 1756-A4/B, 1756-A7/B, 1756-A10/B, 1756-A13/B, 1756-A17/B
1756-PB75/B
1756-PC75/B
1756-PH75/B
1756-PBXT 1756-A4LXT, 1756-A5XT, 1756-A7LXT, 1756-A7XT
1756-PAXT
1756-A4/B, 1756-A7/B, 1756-A10/B, 1756-A13/B, 1756-A17/B
Minimum Cabinet Size
The following table lists the minimum cabinet size for each ControlLogix chassis.
To meet the UL/CSA standards, the cabinet housing your ControlLogix chassis
cannot be smaller than these minimum cabinet-size requirements.
Chassis Minimum Cabinet Size (H x W x D), approx
1756-A4 50.8 x 50.8 x 20.3 cm (20 x 20 x 8 in.)
1756-A7 50.8 x 60.9 x 20.3 cm (20 x 24 x 8 in.)
1756-A10 50.8 x 76.2 x 20.3 cm (20 x 30 x 8 in.)
1756-A13 60.9 x 76.2 x 20.3 cm (24 x 30 x 8 in.)
1756-A17 76.2 x 91.4 x 20.3 cm (30 x 36 x 8 in.)
1756-A4LXT 50.8 x 50.8 x 20.3 cm (20 x 20 x 8 in.)
1756-A5XT 50.8 x 76.2 x 20.3 cm (20 x 30 x 8 in.)
1756-A7LXT 50.8 x 60.9 x 20.3 cm (20 x 24 x 8 in.)
1756-A7XT 50.8 x 76.2 x 20.3 cm (20 x 30 x 8 in.)
Rockwell Automation Publication 1756-IN005C-EN-P - March 2014 15
Chapter 1 Install Chassis and Power Supplies
IMPORTANT
W
i
r
e
w
a
y
Wireway
W
i
r
e
w
a
y
45796
15.3 (6.0)
10.2
(4.0)
7.7
(3.0)
5.1 (2.0)
15.3 (6.0)
5.1 (2.0)
15.3 (6.0)
10.2
(4.0)
The 10.2 (4.0)
measurement to the side
of the enclosure can
include the wireway.
Spacing Requirements
Use the following information to plan your installation.
Make sure you meet the minimum spacing requirements specified.
Allow 15.3 cm (6.0 in.) between chassis and a heat source, and allow
5.1 cm (2.0 in.) between a wireway and the top or bottom of a chassis.
Chassis are intended to be mounted only horizontally. Do not mount vertically.
Dimensions are in cm (in.).
16 Rockwell Automation Publication 1756-IN005C-EN-P - March 2014
Table 4 - Spacing Requirements, Top and Bottom
From a chassis to a Requires this space, min
Cabinet 15.3 cm (6.0 in.)
Chassis or other heat source 15.3 cm (6.0 in.)
Wireway 5.1 cm (2.0 in.)
Table 5 - Spacing Requirements, Sides
From a chassis to a Requires this space, min
Cabinet 10.2 cm (4.0 in.)
Chassis or other heat source 7.7 cm (3.0 in.)
Wireway No minimum spacing required
Install Chassis and Power Supplies Chapter 1
1.1
(0.433)
0.55
(0.217)
Top Mounting
Hole Diameter
Bottom Mounting
Hole Diameter
Right-side View of All Standard Chassis
16.9
(6.65)
14.5
(5.71)
0.78
(0.31)
43591
45797
16.9
(6.65)
14.9
(5.87)
45865
Right-side View of All ControlLogix-XT Chassis
7.0
(2.76)
4.71
(1.85)
16.9
(6.65)
26.3
(10.34)
43592
15.8
(6.22)
14.5
(5.70)
Mounting Dimensions
Use these dimensions to plan your chassis installation.
Dimensions are in cm (in.).
Figure 1 - Chassis Common Dimensions
Figure 2 - 1756-A4 Chassis and Power Supply
Rockwell Automation Publication 1756-IN005C-EN-P - March 2014 17
Chapter 1 Install Chassis and Power Supplies
17.5
(6.89)
14.5
(5.70)
16.9
(6.65)
36.7
(14.47)
43593
15.8
(6.22)
4.71
(1.85)
14.5
(5.70)
16.9
(6.65)
48.3
(19.02)
43594
15.8
(6.22)
5.7
(2.25)
14.0
(5.51)
14.0
(5.51)
14.5
(5.70)
16.9
(6.65)
58.8
(23.13)
43595
15.8
(6.22)
5.7
(2.25)
14.0
(5.51)
14.0
(5.51)
10.5
(4.13)
Figure 3 - 1756-A7 Chassis and Power Supply
Figure 4 - 1756-A10 Chassis and Power Supply
Figure 5 - 1756-A13 Chassis and Power Supply
18 Rockwell Automation Publication 1756-IN005C-EN-P - March 2014
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