5-108
Cisco 7600 Series Router Installation Guide
OL-4503-26
Chapter 5 Removal and Replacement Procedures
Removing and Replacing the Power Supply
Note For multiple DC input power supply, each DC input must be protected by dedicated circuit
breaker or fuse. The circuit breaker or fuse should be sized according to the power supply
input rating and local or national electrical code requirements.
Step 10 Wire for 4500 W (right side of power supply bay) as follows:
a. From the right side of the power supply, connect the ground wire to the ground (Figure 5-102).
Figure 5-102 DC-Input Wire Connections for 4000-W DC-Input Power Supply, Right Side of Power
Bay
b. From the right side of the power supply, connect each of the DC-input wires to the right power
supply terminal block
(Figure 5-97 and Figure 5-102) in this order:
Negative (-)
Positive (+)
Note When you tighten the terminal nuts, make sure they are snug. Do not over tighten them.
Recommended torque strength is 20 inch-pounds. Over tightening the terminal nuts can
break the terminal block (Maximum torque: 36 inch-pounds).
c. Secure outer block cover.
191291
R
U
N
I
N
S
T
A
L
L
CISCO SYSTEMS, INC
1
2
3
4
INPUT OK
FAN
OK
OUTPUT
FAI L
Terminal
block cover
Power leads
attached to
terminal block
( ) Ground
Input power
module
( - ) Negative
(+) Positive
( - ) Negative
(+) Positive
( - ) Negative
(+) Positive
Captive
installation
screw
Power
switch
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