Removing A Dc Pem - Cisco RFGW-10 Hardware Installation Manual

Installation and Removal of the DC PEM
Step 19
Check the power supply and system status from the system console by entering the show power
command. For more information on the commands, refer to the command reference publication for your
chassis and software.
Caution
If power is supplied to the DC PEM before the PEM is inserted, the circuit breaker will trip. If the circuit
breaker trips, wait at least five seconds before further manipulating the unit. Do not touch any connector
during these five seconds.

Removing a DC PEM

This section describes how to remove a DC PEM.
Before performing any of the following procedures, ensure that power is removed from the
Warning
DC circuit. Statement 1003
Caution
Failure to follow this procedure in the right sequence could pose a safety risk and cause damage to the
unit.
Step 1
Turn off the PEM in-line power switch.
Step 2
Ensure that the facility that feeds the DC -48V power supply to the chassis is turned off.
Step 3
Verify that power is off to the DC circuit on the power supply you are removing.
Note
To meet the electromagnetic interference (EMI) requirements, the DC power supply should be removed
from the chassis if the PEM has failed or the circuit breaker is off.
Step 4
Unscrew the top left-hand side captive fastener on the power supply faceplate (thumb screw) first, then
unscrew the bottom right-hand side captive fastener.
Wait for five seconds.
Step 5
Grasp the power supply handle with one hand and pull until you feel the power supply disconnect from
the midplane connector and move freely (approximately 1" removal from the chassis).
Step 6
Unhinge the terminal covers from the terminal blocks to expose the terminal block studs.
Step 7
Using a socket wrench and 10 mm socket disconnect the kepnut retaining the DC-input lugs from the
terminal block.
Step 8
Repeat Step 6 and Step 7 for the second terminal block.
Step 9
Using a socket wrench and 10 mm socket disconnect the kepnut retaining the DC PEM ground lug from
the power supply faceplate.
When installing or replacing the unit, the ground connection must always be made first and
Warning
disconnected last. Statement 1046
Cisco RF Gateway 10 Hardware Installation Guide
5-6
Chapter 5 Installing and Removing FRUs
OL-16264-04