Activating an AC Power Supply
Follow these steps to activate an AC power supply:
Step 1
Plug the power cord into the power supply.
Step 2
Connect the other end of the power cord to an AC-input power source.
Step 3
Verify power supply operation by checking that the power supply LEDs are in the following states:
•
INPUT OK LED is green
•
OUTPUT FAIL LED is green
Step 4
If the LEDs indicate a power problem, see
for troubleshooting information.
Step 5
If you are installing a redundant power supply, repeat these steps for the second power source.
If you are installing a redundant AC power supply, ensure that each power supply is connected to a separate
power source in order to prevent power loss in the event of a power failure.
Note
Removing and Replacing an AC Power Supply
This section describes how to remove and replace an AC power supply.
The Cisco ASR 902 Router power supplies are hot-swappable. If you have installed redundant power
supplies, you can replace a single power supply without interrupting power to the router.
Note
To avoid erroneous failure messages, allow at least 2 minutes for the system to reinitialize after a power
supply has been removed or replaced.
Caution
When you install the unit, the ground connection must always be made first and disconnected last. Statement
1046
Warning
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
Warning
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
Warning
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
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Installing the Cisco ASR 902 Router
Removing and Replacing an AC Power Supply