Reconnecting Dc Power; Removing An Ac Or Dc Power Tray From A Cisco Asr 9000 Series Router - Cisco ASR 9000 Series Installation Manual

Replacing Cisco ASR 9000 Series Router Components

Reconnecting DC Power

Follow these steps to reconnect DC power to a DC power tray:
Procedure
Step 1 Set the power switch to the OFF (0) position.
Step 2
Check that the circuit breaker assigned to the DC power source you are reconnecting is powered OFF (0).
Step 3 Reconnect the DC power cables in the following order:
a) Ground cables first.
b) Positive (RTN) cables next.
c) Negative (PWR) cable last.
d) Repeat Step 1 through Step 3 for the other power tray (Cisco ASR 9010 Router only)
Caution
Caution
Step 4 Replace the clear plastic safety covers over the DC power connection terminal studs and tighten the screws.
Step 5
Set the DC power source circuit breaker to ON (1).
Step 6 Set the power tray switch to ON (1).
Caution

Removing an AC or DC Power Tray from a Cisco ASR 9000 Series Router

The power trays are not a true FRU because they do not support OIR. However, if replacement is necessary,
follow these steps to remove and replace the power trays in a Cisco ASR 9000 Series Router.
Caution Power tray removal and replacement procedures are to be performed by qualified service persons only.
Caution All power to the node must be shut off at the branch circuit disconnect device before beginning power tray
replacement procedures. Removal of a tray requires disconnection of power cabling on the back of the chassis
that exposes service persons to exposed wiring from the unaffected tray.
To prevent injury and damage to the equipment, always attach the ground and source DC power
cable lugs to the power tray terminals in the following order: (1) ground to ground, (2) positive
(+) to positive (+), (3) negative (–) to negative (–).
Do not overtighten the nuts that secure the DC power cables to the power tray terminals. The
nuts should be tightened using the 7/16 hex socket and torque wrench to a torque of 45 to 50
in-lb.
Use this procedure only when reconnecting power to all power modules in a system that is powered
down completely.
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
Reconnecting DC Power
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