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Connecting DC Power Supplies with Power Sources
• 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 one AC power cable into the power supply, and pull down the retention clip over the plug on the power cable.
Step 3
Plug 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
Note
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.
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. Ensure that the
Warning
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 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
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.
If the Fault LED is flashing red, turn the power switch to standby (labeled as 0), check the AC power connections on
the power supply and the AC power source, and then turn the power switch back on (labeled as 1). The Input and Output
LEDs for the connected power supplies should be green and the Fault LED should be off.
Connecting DC Power Supplies with Power Sources
Connect each installed DC power supply with a DC power circuit as follows:
Note
If you are using combined power mode (no power redundancy) or power supply (n+1) power mode,
connect all of the power supplies to the same power circuit (grid). If you are using input source (n+n) or
full power mode, connect half of the power supplies (located in slots 1 and 2) to one AC power circuit
and the other half of the power supplies (located in slots 3 and 4) to another AC power circuit.
Before You Begin
• The power supplies are installed in the chassis.
• A DC power source is within reach of power cables that will be attached to the power supplies.
Cisco Nexus 7706 Hardware Installation Guide
92
Installing or Replacing Modules, Fan Trays, and Power Supplies
Power Supply LEDs
OL-31330-01
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