Installation Instructions
Original Instructions
ControlLogix Redundant Power Supply
Catalog Numbers 1756-PA75R, 1756-PB75R, 1756-PSCA2, 1756-PBXTR, 1756-PSCA2XT, 1756-PAXTR, 1756-PA75RK, 1756-PB75RK, 1756-PSCA2K
The redundant power supply system provides additional uptime protection for chassis that are used in critical applications. The two remotely
mounted supplies are designed to share the current required by the chassis. Two supplies are available in AC (catalog number 1756-PA75R/A or
1756-PAXTR) and DC (catalog number 1756-PB75R/A or 1756-PBXTR) versions that can be mixed or matched when used in tandem.
If one power supply fails, the remaining supply accommodates the entire load of the chassis without disruption to chassis activity.
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).
The 1756-PSCA2 chassis adapter is a passive device. The chassis adapter funnels power from one or two ControlLogix redundant power supplies to
the single power connector on the ControlLogix chassis backplane.
Redundant Power Supply and Chassis Compatibility
Your chassis series determines the redundant power supply that you can use. This table lists the chassis that can be installed with each redundant
power supply.
Topic Page
Summary of Changes
5
Components of the Redundant System
5
Tools Required
6
Parts Required
6
Install the Chassis Adapter
6
Install the Redundant Power Supplies
6
Connect the Power
7
Remove the Protective Label
9
Troubleshoot the Redundant Power Supplies
10
Remove or Replace a Redundant Power Supply
11
Remove or Replace a Chassis Adapter
11
Specifications
12
Additional Resources
13
Power Supply Cat. No.
Chassis Cat. No.
1756-PA75R
1756-A4/B, 1756-A7/B, 1756-A10/B, 1756-A13/B, 1756-A17/B
1756-A4/C, 1756-A7/C, 1756-A10/C, 1756-A13/C, 1756-A17/C
1756-PB75R
1756-PAXTR
(1)
(1)
The 1756-PAXTR and 1756-PBXTR redundant power supplies are only rated from 0…60 °C (32…140 °F) when used in non-XT chassis.
1756-A4/B, 1756-A7/B, 1756-A10/B, 1756-A13/B, 1756-A17/B, 1756-A4LXT/B, 1756-A5XT/B, 1756-A7LXT/B, 1756-A7XT/B
1756-A4/C, 1756-A7/C, 1756-A10/C, 1756-A13/C, 1756-A17/C, 1756-A7XT/C
1756-PBXTR
(1)