Disconnecting Dc Power - Cisco ASR 9000 Series Installation Manual

Disconnecting DC Power

Caution
Disconnecting DC Power
If it becomes necessary to disconnect all DC power from the router, follow these steps
Power Connections to a Power Tray for a Single DC Power Module—Version 2 Power System, on page 194
for version 1 DC power,
Module—Version 3 Power System, on page 195
Connections to a Power Tray for a Single DC Power Module—Version 3 Power System, on page 195
version 3 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
Step 4
Disconnect the DC power cables from their terminals in the following order and note the color of each cable
(Figure 195: Typical Power Connections to a Power Tray for a Single DC Power Module—Version 2 Power
System, on page 194
Single DC Power Module—Version 3 Power System, on page 195
Typical Power Connections to a Power Tray for a Single DC Power Module—Version 3 Power System, on
page 195
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
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
240
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 196: Typical Power Connections to a Power Tray for a Single DC Power
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.
for version 1 DC power,
for version 3 DC power):
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.
Replacing Cisco ASR 9000 Series Router Components
for version 2 DC power, or
Figure 196: Typical Power Connections to a Power Tray for a
for version 2 DC power, or
232.
(Figure 195: Typical
Figure 196: Typical Power
for
Figure 196: