Disconnecting Dc Power - Cisco ASR 9000 Series Installation Manual

Replacing Cisco ASR 9000 Series Router Components
Caution
Step 3
Plug the AC power cords into the power tray receptacle
AC Power Tray—Version 1 Power System, on page
Step 4
Close the retainer bracket to secure the AC power cord plug to the power tray receptacle.
Step 5 Power on the AC power source circuit breaker.
Step 6 Set the power switch at the rear of the AC power tray to the ON (1) position.
Caution

Disconnecting DC Power

Follow these steps to disconnect an individual DC power source from a power tray
Connections to a Power Tray for a Single DC Power Module—Version 2 Power System, on page 194
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 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 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 4
Repeat Step 1 through Step 3 for the other power tray, if installed.
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.
The following procedure is only to be used when reconnecting power to all power trays in a system
that has been powered down completely.
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 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,
for version 3 DC power):
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
(Figure 192: Typical AC Power Connections to an
192).
for version 2 DC power, or
Figure 196: Typical Power Connections to a Power Tray for a
for version 2 DC power, or
Disconnecting DC Power
(Figure 195: Typical Power
for
Figure 196: Typical Power
for
Figure 196:
239