Step 4 Disconnect the DC power cables from their terminals in the following order and note the color of each cable
(Figure 2 for version 1 DC power, Figure 3 for version 2 DC power, or Figure 3 for version 3 DC power):
a) Negative (PWR) cables first.
b) Positive (RTN) cables next.
c) Ground cable last.
Step 5 Repeat Step 1 through Step 4 for the other power tray, if installed.
This procedure describes how to disconnect DC power from all power modules in a single DC
power tray. The procedure is the same for each DC power tray, if more than one is installed.
Note
If only one power tray is installed, performing the following procedure turns off all power to the
router.
Caution
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)
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 50
in-lb.
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).
Use this procedure only when reconnecting power to all power modules in a system that is powered
down completely.
Caution
Replacing Cisco ASR 9000 Series Router Components
20
Replacing Cisco ASR 9000 Series Router Components
Reconnecting DC Power
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