Cisco Nexus 7000 Hardware Installation And Reference Manual page 269

Chapter 10 Installing or Replacing Components
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Warning
Statement 1003
Grasp the power supply unit handle with one hand, and place your other hand underneath the power
Step 4
supply unit to support its weight. Align the back of the power supply unit with the power supply bay and
slide the power supply all the way into the power supply bay until the release lever clicks. Make sure
that the power supply unit does not pull out of the power supply bay without pressing the release lever.
If the power cables are not already connected to the DC power source, connect them as follows:
Step 5
a. Unscrew the three screws on top of the terminal box located in front of the power supply, and remove
the safety cover.
Unscrew two nuts from each of the four terminal slots in the terminal box.
b.
In each of two negative slots (labelled as -), place the lug on the end of a negative power cable, and
c.
fasten with two nuts. Tighten the nuts to 40 in-lb (4.5 N·m).
In each of two positive slots (labelled as +), place the lug on the end of a positive power cable, and
d.
fasten with two nuts. Tighten the nuts to 40 in-lb (4.5 N·m).
Place the safety cover on the terminal box and fasten with three screws.
e.
Turn on the power at the DC power source circuit breaker. The input LEDs turn on when the circuit turns
Step 6
on.
Turn the power switch on the DC power supply from standby (0) to on (1). The output LED turns on
Step 7
when power is being output to the switch.
For information about how to connect the power supply unit to DC power sources for input source
redundancy, see the
page 6-10).
Note
Warning Hazardous voltage or energy may be present on DC power terminals. Always replace cover when
terminals are not in service. Be sure uninsulated conductors are not accessible when cover is in
place. Statement 1075
If one or more of the Input or Output LEDs is not green or the Fault LED is lit or flashing, see the
"Troubleshooting a DC Power Supply Unit" section on page
For more information on the power supply unit LED states, see
LEDs."
OL-23069-07
"Connecting a DC Power Supply Directly to DC Power Sources" section on
If the power source is not within reach of the power cables, connect the power cables to a DC
power interface unit (PIU). To connect the PIU, see the
Power Sources through a Power Interface Unit" section on page
Replacing a DC Power Supply Unit During Operations
9-3.
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
"Connecting a Power Supply to DC
6-18.
Appendix D, "Chassis and Module
10-11