Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 34)

34 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 2 Design an Enhanced Redundancy System
Power Supplies and Redundant Power Supplies in Enhanced
Redundancy Systems
You can use any of the standard or redundant power supplies listed in
Components Available for Use in a Redundant Chassis Pair on page 24 in an
enhanced redundancy system.
Redundant Power Supplies
Typically, enhanced redundancy systems use standard power supplies. You can
choose to use redundant power supplies to maintain power to a ControlLogix
chassis in the event that one of the supplies loses power. Use these hardware
components to connect redundant power supplies:
• Two redundant power supplies for each chassis
• One 1756-PSCA chassis adapter module for each redundant chassis
• Two 1756-CPR cables for each redundant chassis to connect the power
supplies to the 1756-PSCA adapter
• Optional, user-supplied annunciator wiring to connect the power supplies
to remote input modules
Figure 4 - Redundant Power Supplies with Redundant Chassis
For more information about redundant power supplies, see the ControlLogix
Selection Guide, publication 1756-SG001 .
CH2 CH1 OK
2
CH2 CH1 OK
2
1756-PA75R or 1756-PB75R Power Supplies
Primary Chassis
1756-CPR
Cables
Annunciator Wiring
(optional)
1756-CPR
Cables
Secondary Chassis