Activating A Dc Power Supply; Activating An Ac Power Supply - Cisco ASR-920-24SZ-IM Hardware Installation Manual

Power Connection Guidelines
• To prevent loss of input power, ensure that the total maximum load on each circuit supplying the power
• In some systems, you can use an UPS to protect against power failures at your site. Avoid UPS types
Use the information in the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router Specifications
table to estimate the power requirements and heat dissipation of a 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:
SUMMARY STEPS
1. Remove the tape from the circuit-breaker router handle, and restore power by moving the circuit-breaker
router handle to the On (|) position.
2. Verify power supply operation by checking if the respective power supply front panel LED (PS0 or PS1)
is green.
3. If the LEDs indicate a power problem, see the Troubleshooting section.
4. If you are connecting a redundant DC power supply, repeat these steps for the second power source.
DETAILED STEPS
Step 1 Remove the tape from the circuit-breaker router handle, and restore power by moving the circuit-breaker router handle
to the On (|) position.
Step 2 Verify power supply operation by checking if the respective power supply front panel LED (PS0 or PS1) is green.
Step 3 If the LEDs indicate a power problem, see the Troubleshooting section.
Step 4
If you are connecting a redundant DC power supply, repeat these steps for the second power source.
If you are connecting a redundant DC power supply, ensure that each power supply is connected to a separate
Note
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:
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation
Guide
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supplies is within the current ratings of the wiring and breakers.
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.
Installing the Router