Before you begin
Before you connect power supplies to one or two power sources, ensure all of the following:
• You have receptacles for one or two AC power sources within reach of the power supply cables. The
number of power sources depends on the power mode to be used for the switch.
• Combined power (no power redundancy)—One AC power source
• Power supply redundancy (n+1 redundancy)—One AC power source
• Input source redundancy (power-grid redundancy)—Two AC power sources
• Full redundancy—Two AC power sources
• The AC power sources are rated as follows:
• For North American installations—20A with 110V or 220V circuits.
• For international installations—size the circuits by local and national standards.
• The power supply is already installed in the chassis.
• The chassis is connected to an earth ground.
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 AC 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 AC power source supplied by the data center.
If you are using the combined power mode or power supply redundancy, you connect the power cables to the
same 20-A circuit. If you are using the input source redundancy mode or full redundancy mode, you connect
half of the power cables to one AC power source and the other half to another AC power source.
Note
To reduce risk of electric shock and fire, take care when connecting units to the supply circuit so that wiring
is not overloaded.
Warning
Statement 1018
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:
Warning
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 AC power and outputting 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 Power Supply LEDs
When you first activate the power supply, you can verify the functionality of the LEDs by checking that each
LED turns on for a couple of seconds.
Note
Cisco Nexus 7710 Switch Site Preparation and Hardware Installation Guide
OL-30452-01.134
Installing or Replacing Modules, Fan Trays, and Power Supplies
Connecting a 3.5-kW HVAC/HVDC Power Supply to AC Power Sources
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