Cisco 7600-SIP-400 - SPA Interface Processor 400 Installation Manual page 244

Removing and Replacing the PEM
Voltage is present on the backplane when the system is operating. To reduce risk of an electric shock,
Warning
keep hands and fingers out of the power supply bays and backplane areas.
Follow these steps to remove a DC-input PEM:
Verify that power is off to the DC circuit for the PEM you are removing.
Step 1
Step 2 Loosen the captive installation screws on the PEM
Figure 5-112
Cisco 7603 Router DC PEM
P E M -D C
Captive installation screws
Step 3 Slide the PEM part way out of the chassis so that you have access to the PEM terminal block screws
(Figure
Figure 5-113
DC PEM 1
terminal block
Disconnect the DC-input wires from the PEM terminal block in the following order:
Step 4
Positive (+)
•
Negative (–)
•
Note
Cisco 7600 Series Router Installation Guide
5-116
DC-Input PEM
-4 8 TO
-6 0V
25 A M
AX
/3
5-113).
DC-Input PEM Terminal Block Screws
DC PEM 1 DC PEM 2
screws
WS-X6 K-SUP 2-2GE
CONSOL E
PORT
MODE
CONSOL E
SUPER VISOR 2
OSM-4OC 12 POS-SI
4 PORT OC-12 POS
SM IR
OSM-4OC 12 POS-SI
4 PORT OC-12 POS
SM IR
It is not necessary to disconnect the system ground connection.
(Figure
Cisco 7606 Router DC PEM
-4 8 TO
-6 0V
50 A M
AX
P E M -D C
Captive installation screws
Cable clips
Switch
Load
100%
PORT 1
PCMCIA
EJECT
1%
Chapter 5 Removal and Replacement Procedures
5-112).
Cisco 7603-S Router DC PEM
-4 8 TO
50 A M
P E M -D C
Captive installation screws
PORT 2
-6 0V
AX
OL-4503-26