Disconnecting Dc Power - Cisco ASR 9000 Series Manual

Replacing Cisco ASR 9000 Series Router Components

Disconnecting DC Power

Follow these steps to disconnect an individual DC power source from a power tray
DC power,
Procedure
Step 1
Power off the circuit breaker assigned to the DC power source you are disconnecting.
Caution
Step 2
Remove the clear plastic safety covers that fit over the DC power connection terminal studs.
Caution
Step 3
Disconnect the DC power cables from their terminals in the following order and note the color of each cable
(Figure 2
a) Negative (PWR) cables first.
b) Positive (RTN) cables next.
c) Ground cable last.
Step 4 Repeat Step 1 through Step 3 for the other power tray, if installed.
Caution
Disconnecting DC Power
If it becomes necessary to disconnect all DC power from the router, follow these steps
1 DC power,
Procedure
Step 1 Set the power tray switch to the STANDBY (0) position.
Step 2
Power OFF (0) the circuit breaker assigned to the DC power source you are disconnecting.
Caution
Step 3 Remove the clear plastic safety covers that fit over the DC power connection terminal studs.
Caution
Figure 3 for version 2 DC power, or
To ensure that power remains off while you are performing this procedure, lock-out/tag-out the
circuit breaker switch in the STANDBY (0) position until you are ready to turn it on.
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.
for version 1 DC power, Figure 3
It is not necessary to disconnect all power from the router to replace components, including power
modules. See Removing and Replacing Power System Components, on page
Figure 3 for version 2 DC power, or
To ensure that power remains off while you are performing this procedure, lock-out/tag-out the
circuit breaker switch in the OFF (0) position until you are ready to turn it on.
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.
Figure 3 for version 3 DC power):
for version 2 DC power, or Figure 3
Figure 3 for version 3 DC power):
Replacing Cisco ASR 9000 Series Router Components
Disconnecting DC Power
(Figure 2 for version 1
for version 3 DC power):
12.
(Figure 2 for version
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