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Connect the Power
WARNING: EXPLOSION HAZARD
If you connect or disconnect the 1756-CPR2 cables while either backplane power source is on, an electric arc can occur. This could cause an explosion in hazardous
location installations. Repeated electric arcing causes excessive wear to contacts on both the module and its mating connector. Worn contacts may create
electrical resistance that can affect module operation.
Be sure that power is removed or the area is nonhazardous before proceeding.
Use the 1756-CPR2, 1756-CPR2D, or 1756-CPR2U cable to connect your redundant power supply to the 1756-PSCA2 or 1756-PSCA2XT
chassis adapter.
1. Connect the male end of the power cable to the chassis adapter (series C depicted).
1756-CPR2
2. Connect the female end of the power cable to the redundant power supply.
3. Tighten the screws to hold the cable in place.
Make sure that you tighten the screws securely to hold the cable in place for the
life of the product.
4. Repeat these steps with the second redundant power supply.
WARNING: EXPLOSION HAZARD
If you connect or disconnect wiring while the field-side power is on, an electric arc can occur. This can cause an explosion in hazardous location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
ATTENTION: Do not wire more than one conductor on any single terminal.
Use a 15 A time-delay type fuse in all ungrounded power connections.
Use 2.5 mm2 (14 AWG) solid or stranded-copper wire that is rated at 90 °C (194 °F), or greater, 1.2 mm (3/64 in.) insulation maximum to connect
power. Tighten the terminals to a torque of 0.565 N•m (5 lb•in).
1756-CPR2D
Rockwell Automation Publication 1756-IN620D-EN-P - October 2018
ControlLogix Redundant Power Supply
1756-CPR2U
7
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