Table of Contents
Installing or Replacing Modules, Fan Trays, and Power Supplies
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
Note
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.
If the Fault LED is flashing red, turn the power switch to standby (labeled as 0), check the 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.
• Power cables are available to connect each DC power supply to the DC power source.
Step 1
Turn the power switch to standby (labeled 0 on the power switch).
Step 2
Turn off the power at the circuit breakers for the portions of the DC grid power that you are connecting to and verify that
all of the LEDs on the power supplies are off.
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Warning
Statement 1003
Step 3
Size the power cables to the distance between the power supply and the DC power grid. If you need to cut the cable, cut
it at the end that connects to the DC power grid, remove 0.75 inch (19 mm) of insulation from the cut ends, and attach
them to the DC power system. Be sure to connect the negative cables to negative lines and positive cables to positive
lines.
For all your power connections, if you are using cables with two different colors, use one color cable for all
Note
positive circuits and the other color for all negative circuits.
OL-31330-01
Connecting DC Power Supplies with Power Sources
Power Supply LEDs
Cisco Nexus 7706 Hardware Installation Guide
109
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