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Rockwell Automation Publication 1756-IN620D-EN-P - October 2018
ControlLogix Redundant Power Supply
Troubleshoot the Redundant Power Supplies
The redundant power supplies have a green status indicator for power and an amber status indicator for non-redundancy.
The
Status Indicators
table describes how to use the status indicators to troubleshoot your redundant power supplies.
Chassis Adapter Status Indicator
The chassis adapter has a green power status indicator. When the status indicator is solid green, the chassis is receiving power from the redundant
power supplies. If the indicator is off, the chassis is not receiving power from the redundant power supplies. See the
Status Indicators
table to
troubleshoot the redundant power supplies.
Status Indicators
Power Indicator
Non-red Indicator
Description
Take This Action
Solid green
Off
The power supplies are operating properly.
None
Solid green
Solid amber
This power supply is operating properly, but is the only power
supply providing power to the chassis adapter.
Check the other power supply.
Off
Solid amber
All possible connections are made, but the power supply is turned
off.
Turn the power supply ON. If the power supply does not turn ON, follow these
steps.
1. Remove the input power from the power supply.
2. Wait 30 seconds.
3. Reconnect the input power.
4. Turn the power supply ON.
If the power supply still does not turn ON, it can require replacement.
Off
Off
Any of the following conditions can apply:
Take the corresponding action:
The supply is turned OFF.
Turn the power supply ON.
Line voltage is not within the specified range.
Verify that line power is in the specified range. If the indicators remain OFF,
cycle power.
All connections are made, but input power is not supplied.
Verify that input power is supplied and turn the power supply ON.
All connections are made, including input power, but the
output cable (1756-CPR2) is not connected.
Connect the output cable and turn the power supply ON.
The power supply is ON but defective.
The power supply can require replacement.
Power
Non-red