Cisco ASR 920 Series Installing Manual page 24

Installing the Chassis Ground Connection
Preventing Power Loss
Use the following guidelines to prevent power loss to the router:
•
•
Use the information in the
Cisco ASR 920 Series Router based on a given configuration of the router. Determining power
requirements is useful for planning the power distribution system needed to support the router.
Activating a DC Power Supply
Perform the following procedure to activate a DC power supply:
Remove the tape from the circuit-breaker router handle, and restore power by moving the circuit-breaker
Step 1
router handle to the On (|) position.
Verify power supply operation by checking if the respective power supply front panel LED (PS0 or PS1)
Step 2
is green.
Step 3 If the LEDs indicate a power problem, see
If you are connecting a redundant DC power supply, repeat these steps for the second power source.
Step 4
If you are connecting a redundant DC power supply, ensure that each power supply is connected to a
Note
separate power source in order to prevent power loss in the event of a power failure.
Activating an AC Power Supply
Perform the following procedure to activate an AC power supply:
Plug the power cord into the power supply.
Step 1
Connect the other end of the power cord to an AC-input power source.
Step 2
Verify power supply operation by checking if the respective power supply front panel LED (PS0 or PS1)
Step 3
is green.
If the LEDs indicate a power problem, see
Step 4
information.
If you are connecting a redundant AC power supply, repeat these steps for the second power source.
Step 5
If you are connecting a redundant AC power supply, ensure that each power supply is connected to a
Note
separate power source in order to prevent power loss in the event of a power failure.
Cisco ASR 920 Series Aggregation Services Router Hardware Installation Guide
3-24
To prevent loss of input power, ensure that the total maximum load on each circuit supplying the
power supplies is within the current ratings of the wiring and breakers.
In some systems, you can use an UPS to protect against power failures at your site. Avoid UPS types
that use ferroresonant technology. These UPS types can become unstable with systems such as the
Cisco ASR 920 Series Router, which can have substantial current-draw fluctuations due to bursty
data traffic patterns.
Table 1-1
Chapter 3
to estimate the power requirements and heat dissipation of a
Chapter 5, "Troubleshooting."
Chapter 5, "Troubleshooting"
Installing the Cisco ASR 920 Series Router
for troubleshooting
OL-32751-01