5-79
Cisco 7600 Series Router Installation Guide
OL-4503-26
Chapter 5 Removal and Replacement Procedures
Removing and Replacing the Power Supply
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).
f.
Using the cable tie provided, place the cable tie through the slot at the top of the right terminal block
cover and secure the wiring going to the left terminal block.
g.
Place and secure left and right inner terminal block cover.
h.
Secure outer block cover.
Note
For proper 4000W DC-input redundant power configuration, all three pairs of input wires for
one 4000W DC-input power supply must come from the same battery system (A feed); all three
pairs of input wires for the other 4000W DC-input power supply must come from another battery
system (B feed).
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.
Warning
When installing the unit, the ground connection must always be made first and disconnected last.
Caution
To prevent a short circuit or shock hazard after wiring the DC-input power supply, reinstall the terminal
block covers.
Step 13
After confirming all installation steps are correctly completed, safety flags and lockout devices can be
removed, and the input circuits to the supplies can be energized.
Step 14
Verify power supply operation by checking that the power supply front panel LEDs are in the following
states:
•
INPUT OK LED is green
•
FAN OK LED is green
•
OUTPUT FAIL LED is not lit
If the LEDs indicate a power problem, see the
“Identifying Startup Problems” section on page 4-2
.