Cisco Gigabit Switch Router 12008 Installation And Configuration Manual page 307

Figure 7-8
R
e
c
t
AC
i
f
i
e
r
s
Plant
Controls
B a t t e r y
Connecting Source DC Power Cables to the DC-Input Power Supply
B
a
t
t
e
r
i
e
s
p l a n t
CAUTION
0
INPUT
0K
OUTPU T
FAIL
TER
MIN
ALS
MA
Y
BE
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EN
ER
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ED. NC
BER
NO
UHR
EN
DER
ANS
CHL
USS
E
DEN
HAU
PTS
CHA
LTER
Adding, Removing, or Replacing a DC-Input Power Supply
Central
office
ground
a
GND
b
c
Central
office
primary
and
secondary
DC
power
distribution
Return
CO
GND
Ground
window
CO
Maintaining the Cisco 12008 7-27
48 VDC