Cisco ASR 9000 Series Руководство - Страница 20

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Reconnecting DC Power

Step 4

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 5

Repeat Step 1 through Step 4 for the other power tray, if installed.

Note

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)

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).

Caution

Replacing Cisco ASR 9000 Series Router Components

for version 1 DC power,

Figure 3

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.

If only one power tray is installed, performing the following procedure turns off all power to the

router.

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 be tightened using the 7/16 hex socket and torque wrench to a torque of 45 to 50

in-lb.

Use this procedure only when reconnecting power to all power modules in a system that is powered

down completely.

Replacing Cisco ASR 9000 Series Router Components

for version 2 DC power, or

Figure 3

for version 3 DC power):