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Installing or Replacing Modules, Fan Trays, and Power Supplies
You follow the same steps to install AC, DC and HVAC/HVDC power supplies into the switch, but you
ground them differently. For an AC and HVAC/HVDC power supply, you automatically ground it when you
connect its power cable to the power supply and the power source.
Before you begin
• The switch chassis must be installed in a cabinet or rack that is secured to the data center.
You need the following additional tools and equipment:
• Nut driver attachment for Number 1 Phillips-head screwdriver or ratchet wrench with torque capability
• Crimping tool
• Grounding wire—Size this wire to meet local and national installation requirements. For U.S. installations,
Step 1
If you need to open a power supply slot for another power supply, follow these steps:
Note
If you neet to remove a blank filler plate, unscrew its captive screws and pull it off the chassis. Go to Step 2.
a) Turn off the power for the power supply that you are removing, as follows:
1. Ensure that the power switch on the front of the power supply is set to standby (labelled as ). The Output LED
turns off.
2. Verify that the Output LED turns off. If the LED is still on, return to Step 1.
3. If you are removing a DC power supply, ensure that the power is turned off at the power source by turning off
the power for that circuit, and verify that the Input LEDs turn off.
b) If you are removing a power supply, detach the power and ground cables as follows:
• For a AC power supply, unplug the power cables that are attached to the power supply and the power source.
• For a 3.5-kW HVAC/HVDC power supply, release the built-in latch and unplug the power cable from the power
source.
c) Remove the power supply or blank filler plate from the power supply slot as follows:
To remove a blank filler plate, unscrew its captive screws and pull on its handle to remove the plate from
Note
the slot.
• For a 3.5-kW HVAC/HVDC power supply, disconnect the power cable from the power supply by pressing the
release button on the power cable, pull the power supply part way out of the slot by its handle, place your other
hand under the module to support its weight, and pull it fully from the slot.
Step 2
Install the new power supply in the open slot as follows:
a) Verify that the power switch on the front of the new power supply is set to standby (labelled as ) and that the power
supply is not connected to any power sources.
OL-31330-01
(used only for DC power supplies)
you must use a 6 AWG copper conductor. For installations outside the U.S., consult your local and
national electrical codes. The length of the grounding wire depends on the proximity of the switch to
proper grounding facilities.
Installing or Replacing a Power Supply in a Switch Chassis
Cisco Nexus 7706 Hardware Installation Guide
105
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