Cisco 7600-SIP-400 - SPA Interface Processor 400 Installation Manual page 202

Removing and Replacing the Power Supply
Note
Attach the appropriate lugs to the DC-input wires. The maximum width of a lug is 0.600 inch (15.2 mm).
Step 8
The wire should be sized according to local and national installation requirements. Use only copper wire.
Note
Note
The 4000 W DC-input power supply provides voltages of 2700 W or 4000 W. Select 2700 W by wiring
Note
any two positive (+)/negative (-) terminal pairs in any sequence. Select 4000 W by wiring all three
terminals. The Cisco IOS software detects the wired inputs and sets the proper system power.
If you are wiring for 2700 W for a single power supply, proceed to Step 9; if you are wiring 2700 W for
Note
a redundant power supply, proceed to Step 9 and then Step 11. If you are wiring for 4000 W for a single
power supply, proceed to Step 10; if you are wiring 4000 W for a redundant power supply, proceed to
Step 10 and then Step 12.
Wire for 2700 W (left side of power supply bay) as follows:
Step 9
Place both plastic insulators over the terminal areas, aligning the circular holes in insulating cover
a.
with terminal posts. The protective end flap on the plastic cover is opposite the wire entry area. The
protective end flap must fold down and cover the open side of the terminal (opposite side from wire
entry).
Be sure to place a plastic insulator over the smaller terminal block even if you are not attaching DC-input
Note
wires to it; this ensures that the plastic insulator is available for future use.
b. Wrap the large perforated flaps around each pair of conductors, inserting each locking tab into rear
of slot. Pull the tab until the cover is secured around the power cabling trim and discard excess tab
plastic.
From the left side of the power supply, connect the ground wire to the ground
c.
Cisco 7600 Series Router Installation Guide
5-74
The power supply terminal block lug opening width is 0.62 inch (15.8 mm). The terminal posts
are centered 0.625 inches (15.88 mm) apart and are 1/4-20 threaded. We recommend that you
use an appropriately sized industry standard 2-hole, standard barrel compression lug. The power
supply ground studs, located below the terminal block, are also threaded 1/4-20 and require two
1/4-inch split-ring washers and two 1/4-20 hex nuts.
For 4000 W power supplies, use fine-stranded copper conductors rated for 45-degrees Celsius
for North American installations.
You must install plastic insulators that are shipped with the power supply as described below.
Chapter 5 Removal and Replacement Procedures
(Figure 5-77).
OL-4503-26