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Installing or Replacing Modules, Fan Trays, and Power Supplies
• Grounding wire—Size this wire to meet local and national installation requirements. For U.S. installations,
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.
Procedure
Step 1
If you need to open a power supply slot for another power supply, follow these steps:
Note
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 0). The
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
b) If you are removing a power supply, detach the power and ground cables as follows:
c) Remove the power supply or blank filler plate from the power supply slot as follows:
Note
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 0) and that
the power supply is not connected to any power sources.
b) Hold the handle on the power supply with one hand, place your other hand under the power supply to
support its weight, and position the power supply with its back end at the open power supply bay.
c) Slide the unit all the way into the power supply bay until one of the following situations occurs:
OL-30453-01
If you neet to remove a blank filler plate, unscrew its captive screws and pull it off the chassis. Go
to Step 2.
Output LED turns off.
turning off the power for that circuit, and verify that the Input LEDs turn off.
• For a 3-kW AC power supply, unplug the power cables that are attached to the power supply and
the power source.
• For a 3-kW DC power supply, open the terminal box, and use a Phillips screwdriver to remove the
power cables from their terminals. Replace the terminal box cover. Remove the power cables from
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.
To remove a blank filler plate, unscrew its captive screws and pull on its handle to remove the
plate from the slot.
• For a 3-kW power supply, press its ejector latch to the left, 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.
• 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.
Cisco Nexus 7718 Switch Site Preparation and Hardware Installation Guide
Installing or Replacing a Power Supply in a Switch Chassis
125
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