Cisco Nexus 7000 Series Hardware Installation And Reference Manual page 233

Chapter 9 Replacement Procedures
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m
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 into the power supply bay. Make sure the power supply unit is fully seated in the
power supply bay and that its four captive screws are aligned with their holes in the chassis.
The 6-kW power supply unit weighs 21 lb (9.5 kg). Use two hands to safely hold and move a power
Note
supply unit.
Screw in each of the four captive screws and tighten to 8 in-lb (0.9 N·m).
Step 5
Step 6 Attach the Earth ground to the power supply unit (see the
section on page
Warning When installing or replacing the unit, the ground connection must always be made first and
disconnected last. Statement 1046
If the power cables are not already connected to the DC power source, connect them as follows:
Step 7
For 3 kW of power, connect one set of power cables (two sets of positive and negative cables
•
attached to one plug) to the DC power circuit.
For 6 kW of power, connect two sets of power cables (four sets of positive and negative cables
•
attached to two plugs) to the DC power circuit.
For information on how to connect the power supply unit to DC power sources for input source
redundancy, see the
page 5-7).
Note
Hazardous voltage or energy may be present on DC power terminals. Always replace cover when
Warning
terminals are not in service. Be sure uninsulated conductors are not accessible when cover is in
place. Statement 1075
Tip For power redundancy, connect each set of power cables (each set with a common plug for the power
supply unit) to a separate DC power circuit.
Step 8 Attach the DC power cable plugs to the power supply unit and fasten them by tightening the captive
screw on each end of the plug to 8 to 11 in-lb (0.9 to 1.2 N·m).
Step 9 Turn on the circuit breaker for the DC circuits that you connected.
Turn the Power switch on the power supply unit from STBY to ON.
Step 10
Verify the power supply operation by checking that the power supply LEDs are in the following states:
Step 11
• For 3 kW of output power, make sure that two Input LEDs are green.
For 6 kW of output power, make sure that four Input LEDs are green.
•
Output LED is green.
•
OL-23069-06
5-5).
"Connecting a DC Power Supply Unit 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 though a Power Interface Unit" section on page
Replacing a DC Power Supply Unit During Operations
"Grounding a 6-kW DC Power Supply Unit"
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
"Connecting a Power Supply Unit to DC
5-11.
9-11