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Installing or Replacing Modules, Fan Trays, and Power Supplies
If the FAULT LED is lit or flashing, call Cisco TAC for assistance.
What to do next
You are ready to connect the switch to the network.
Connecting a 3.5-kW HVAC/HVDC Power Supply to DC Power Sources
You use one power cord to connect a 3.5-kW HVAC/HVDC power supply to its DC power source and to
ground the power supply. Depending on the power mode that you use for the switch, you either connect all
of the power supplies to one DC power source or you connect half of the power supplies to one DC power
source and the other half to another DC power source.
Before you begin
Before you connect power supplies to one or two power sources, ensure all of the following:
• The power supply is already installed in the chassis.
• A DC power source is within reach of power cables that will be attached to the power supplies.
• Power cables are available to connect each HVAC/HVDC power supply to the DC power source.
Step 1
Ensure that the power supply switch located on the front of the power supply is set at standby (labeled as 0).
Step 2
Plug the DC power cable into the power supply. The built-in latch secures the power cable to the power supply. You can
disconnect the power cable from the power supply by pressing the release button on the power cable.
Step 3
Plug or connect the other end of the power cable into a DC power source supplied by the data center.
Connect the power supply to the appropriate polarity and ground as indicated on the power cable plug or as
Note
marked on the ring lug cable.
To reduce risk of electric shock and fire, take care when connecting units to the supply circuit so that wiring
Warning
is not overloaded.
Statement 1018
Warning
This product relies on the building's installation for short-circuit (overcurrent) protection. To reduce risk of
electric shock or fire, ensure that the protective device is rated not greater than:
250V, 20 A
Statement 1005
Step 4
Turn the power supply switch from standby to on (from 0 to 1 as labeled on the power switch).
Step 5
Verify that the power supply is receiving DC power by making sure that the INPUT and OUTPUT power supply LEDs
are lit and the FAULT LED is not lit or flashing. For an explanation of all the power supply LEDs and the conditions
that they indicate, see
When you first activate the power supply, you can verify the functionality of the LEDs by checking that each
Note
LED turns on for a couple of seconds.
OL-30452-01.
Power Supply LEDs
Cisco Nexus 7710 Switch Site Preparation and Hardware Installation Guide
Connecting a 3.5-kW HVAC/HVDC Power Supply to DC Power Sources
137
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