Cisco 7600-SIP-400 - SPA Interface Processor 400 Installation Manual page 207

Chapter 5 Removal and Replacement Procedures
Note
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.
Place and secure left and right inner terminal block cover.
g.
Secure outer block cover.
h.
Note
Note
When installing the unit, the ground connection must always be made first and disconnected last.
Warning
Caution To prevent a short circuit or shock hazard after wiring the DC-input power supply, reinstall the terminal
block covers.
After confirming all installation steps are correctly completed, safety flags and lockout devices can be
Step 13
removed, and the input circuits to the supplies can be energized.
Verify power supply operation by checking that the power supply front panel LEDs are in the following
Step 14
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
OL-4503-26
Positive (+)
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).
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).
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.
Removing and Replacing the Power Supply
"Identifying Startup Problems" section on page
Cisco 7600 Series Router Installation Guide
4-2.
5-79