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CiscoASR 9000 Series Aggregation Services Router Hardware Installation Guide
Chapter5 Replacing Cisco ASR 9000 Series Router Components
Removing and Replacing Power System Components
Step3 Remove the clear plastic safety covers that fit over the DC power connection terminal studs.
Caution To prevent injury and damage to the equipment, always remove the source DC power cables and ground
from the power tray terminals in the following order: (1)negative (–), (2) positive (+), (3) ground.
Step4 Disconnect the DC power cables from their terminals in the following order and note the color of each
cable (Figure 3-21 for version 1 DC power, Figure3-22 for version 2 DC power, or Figure 3-23 for
version 3 DC power):
a. Negative (PWR) cables first.
b. Positive (RTN) cables next.
c. Ground cable last.
Step5 Repeat Step 1 through Step 4 for the other power tray, if installed.
Reconnecting DC Power
Caution Use this procedure only when reconnecting power to all power modules in a system that is powered down
completely.
Follow these steps to reconnect DC power to a DC power tray:
Step1 Set the power switch to the OFF (0) position.
Step2 Check that the circuit breaker assigned to the DC power source you are reconnecting is powered OFF (0).
Step3 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 (CiscoASR 9010 Router only)
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 (–).
Caution 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 50in-lb.
Step4 Replace the clear plastic safety covers over the DC power connection terminal studs and tighten the
screws.
Step5 Set the DC power source circuit breaker to ON (1).