Cisco 7606-S Installation Manual page 86

Removing and Replacing the Power Supply
If the LEDs indicate a power problem, see the
Installing a PWR-4000-DC Power Supply in a Cisco 7613 Router
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Warning
For proper 4000W DC-input redundant power configuration, all three pairs of input wires for one 4000W
Note
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
Note
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.
Note The 4000 W DC-input power supply provides voltages of 2700 W or 4000 W. Select 2700 W by wiring
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.
The procedure that follows provides instructions for installing PWR-4000-DC power supplies in
Note
redundant 2700 W or 4000 W configurations. If you are installing a single power supply, install it in the
left-side position that corresponds to the chassis labeling "Power 1."
Follow these steps to install a DC-input power supply:
The PWR-4000-DC power supply ground provides the system ground connection when the
Note
PWR-4000-DC power supply is installed in a Cisco 7613 router. Install the ground as described in this
procedure.
For redundant power supplies, you must connect the PWR-4000-DC power supply ground for both
Note
power supplies.
Cisco 7600 Series Router Installation Guide
5-86
Chapter 5 Removal and Replacement Procedures
"Identifying Startup Problems" section on page 4-2.
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