Step 5
Move the handle up.
Step 6
Tighten the screw that secures the power module using a Phillips screw driver.
To prevent damage to the power tray backplane connector, do not use excessive force when inserting
the power module into the power tray.
Caution
Step 7
Verify that the (green) Power Input indicator on the front of the power module goes on.
Disconnect DC Power
Procedure
Step 1
Power off the circuit breaker assigned to the DC power source you are disconnecting.
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.
Caution
Step 2
Remove the clear plastic safety covers that fit over the DC power connection terminal studs.
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 (+).
Caution
Step 3
Disconnect the DC power cables from their terminals in the following order and note the color of each cable.
a) Negative (PWR) cables first.
b) Positive (RTN) cables last.
Step 4
Repeat Step 1 through Step 3 for the other power tray, if installed.
It is not necessary to disconnect all power from the router to replace components, including power
modules.
Caution
Reconnect 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) Positive (RTN) cables first.
b) Negative (PWR) cable last.
c) Repeat Step 1 through Step 3 for the other power trays.
Hardware Installation Guide for Cisco 8800 Series Routers
129
Replace Chassis Components
Disconnect DC Power
