Reconnecting Dc Power - Cisco ASR 9000 Series Installation Manual

Chapter 5 Replacing Cisco ASR 9000 Series Router Components
To prevent injury and damage to the equipment, always remove the source DC power cables and ground
Caution
from the power tray terminals in the following order: (1) negative (–), (2) positive (+), (3) ground.
Disconnect the DC power cables from their terminals in the following order and note the color of each
Step 4
cable (see
a.
b.
c.
Repeat
Step 5

Reconnecting DC Power

Use this procedure only when reconnecting power to all power modules in a system that is powered down
Caution
completely.
Follow these steps to reconnect DC power to a DC power tray:
Set the power switch to the OFF (0) position.
Step 1
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.
b.
c.
d.
Caution 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
Caution
be tightened using the 7/16 hex socket and torque wrench to a torque of 45 to 50 in-lb.
Replace the clear plastic safety covers over the DC power connection terminal studs and tighten the
Step 4
screws.
Step 5 Set the DC power source circuit breaker to ON (1).
Step 6 Set the power tray switch to ON (1).
Figure 3-21 for version 1 DC power or
Negative (PWR) cables first.
Positive (RTN) cables next.
Ground cable last.
Step 1 through Step 4 for the other power tray, if installed.
Ground cables first.
Positive (RTN) cables next.
Negative (PWR) cable last.
Repeat Step 1 through Step 3
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
Removing and Replacing Power System Components
Figure 3-23
for the other power tray (Cisco ASR 9010 Router only)
for version 2 DC power):
5-19