Cisco 7600-SIP-400 - SPA Interface Processor 400 Installation Manual page 165

Chapter 5 Removal and Replacement Procedures
Note
Remove the plastic insulator from over the terminal area
Step 6
Step 7 Disconnect the DC-input wires from the terminal block in this order:
• Positive (+)
• Negative (-)
Note
Step 8 Disconnect the PWR-4000-DC power supply ground.
When installing the unit, the ground connection must always be made first and disconnected last.
Warning
Figure 5-41
Power leads
attached to
terminal block
(+) Positive
( - ) Negative
(+) Positive
( - ) Negative
Figure 5-41
Note
Loosen the captive installation screw on the power supply
Step 9
OL-4503-26
You must remove three terminal block covers for the 4000 W DC-input power supply.The
left-side inner terminal block cover has two securing screws and the right-side inner terminal
block cover has one securing screw.
You must remove DC-input wires from two terminal blocks for the 4000 W DC-input power
supply (if both terminal blocks are used).
DC-Input Wire Connections for 4000-W DC-Input Power Supply
Terminal
Plastic
block cover
insulator
( ) Ground
0
Power
switch
shows a 4000 W configuration that requires cable tie-wraps.
(Figure
Terminal
Power leads
attached to
block cover
terminal block
Plastic
(+) Positive
insulator
( - ) Negative
I
INP UT OK
FAN OUT PUT
1
2
3
OK
FAIL
Captive
installation
screw
(Figure
Cisco 7600 Series Router Installation Guide
Removing and Replacing the Power Supply
5-41).
( ) Ground
5-41).
5-37