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Replace a Redundant Power Supply
If you must replace a ControlLogix redundant power supply, follow the
steps below.
You can replace one redundant power supply while the other
IMPORTANT
supply is operating in non-redundant mode without affecting
chassis operation.
Remove Power Supply
Follow the steps below to remove the supply.
1. Turn the redundant power supply OFF.
2. Disconnect line power source voltage to the supply and annunciator.
3. Remove the wiring terminal blocks.
4. Unscrew and disconnect the 1756-CPR2 cable from the supply.
5. Loosen mounting bolts and remove the supply.
Replace Power Supply
Follow the steps below to replace a redundant power supply.
1. Slide the replacement redundant power supply over the installed screws and
tighten them.
2. Install the remaining tab screw(s) at the bottom of the supply.
3. Ground the replacement supply as described on page 13.
4. Connect all cables to the new supply as described on pages 14-17.
5. Activate power as described on page 18. When you turn ON the
replacement redundant power supply, the connected chassis automatically
draws power from both redundant power supplies.
Allen-Bradley H
ControlLogix Redundant Power Supply
Publication 1756-IN573C-EN-P - October 2003
21
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