Cisco ASR 9910 Посібник - Сторінка 19

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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

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