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Cisco AS5800 Operations, Administration, Maintenance, and Provisioning Guide
DOC-7810814=
Chapter 5 Maintenance
Replacement Procedures
To continue, you must next disconnect power cables and alarm cables to the dial-shelf PEMs.
Step 1 Loosen the screws in the DC-input power terminal blocks and the alarm terminal blocks using a 1/4-in.
flat-blade screwdriver, and disconnect power cables and alarm cables to the dial-shelf PEMs.
Figure 5-25 shows the location of the terminal blocks.
Figure 5-25 PEM Cable and Alarm Terminal Blocks
The following steps refer to the optional AC-input power shelf. If you are using a DC power source, you
can skip Step 2 and Step 3.
–
4
8V
–4
8V
R
T
N
C
N
C
N
O
P
O
W
E
R
M
IS
W
IR
E
C
NC
NO
–48V
–48V
RTN
POW
ER
MISW
IRE
–4
8V
–
48V
R
T
N
C
N
C
N
O
P
O
W
E
R
M
IS
W
IR
E
LEDs
DC-input power
terminal block
Alarm
terminal block
To CO
alarms
H11000
Captive screw
Power switch
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