Publication 1756-UM523F-EN-P - December 2006
34 Design the System
Redundant Power Supplies
Redundant power supplies let you maintain power to a ControlLogix
chassis if a power supply fails. Redundant power supplies use these
supplies:
• Two redundant power supplies, any combination of 1756-PA75R
and 1756-PB75R.
• 1756-PSCA chassis adapter module, in place of the standard
power supply.
• Two 1756-CPR cables to connect the power supplies to the
1756-PSCA adapter.
• User-supplied annunciator wiring to connect the power supplies
to the input modules if needed.
Redundant Power Supplies
1756-PA75R or
1756-PB75R
Power Supply
ControlLogix Chassis
with 1756-PSCA Module
1756-CPR Cable
1756-PA75R or
1756-PB75R
Power Supply
Annunciator Wiring
1756 Digital
Input Module
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