Summary Of Changes; Components Of The Redundant System - Allen-Bradley 1756-PA75R Installation Instructions Manual

Removable Terminal Blocks (RTBs) for I/O Connections
WARNING: EXPLOSION HAZARD
When you connect or disconnect the removable terminal block (RTB) with field side power applied, an electric arc can occur. This could cause an explosion in
hazardous location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.

Summary of Changes

We updated the torque requirement on pages

Components of the Redundant System

The following graphic (series C chassis depicted) shows the components of a redundant system in a typical configuration.
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IMPORTANT The ControlLogix redundant power supply system is designed to account for operational anomalies in only the power supply. The chassis adapter and power
supply cables are excluded.
Item Description
1 Redundant power supply
2 Redundant power supply cable (Length = 0.91 m [3 ft])
3 Redundant power supply chassis adapter
(1)
4 Annunciator wiring (Maximum length = 10 m [32.8 ft])
(1) Optional user-provided annunciator wiring can be connected to the solid-state relay for status and for troubleshooting. See
(2) Cable bend radius is 12.7 cm (5.0 in.).
(3) Cable bend radius can be greater than or less than the minimum mounting clearance of the chassis. Always maintain chassis minimum mounting clearance.
(4) Requires 10.16 cm (4.0 in.) of clearance next to the chassis adapter.
7 and 12 for these power supplies.
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Rockwell Automation Publication 1756-IN620D-EN-P - October 2018
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Cat. No.
1756-PA75R/A and/or 1756-PB75R/A or 1756-PAXTR and/or 1756-PBXTR
(2)(3) (3)(4)
1756-CPR2 or 1756-CPR2D or 1756-CPR2U
1756-PSCA2 or 1756-PSCA2XT
User-supplied
page 8 for more information.
ControlLogix Redundant Power Supply
(3)(4)
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