d) Replace the safety cover on the terminal box and fasten with three screws.
Step 6
Install the four cables from the DC power supply to a DC power source as follows:
a) If the unconnected end of each power cable is not stripped of its insulation for the last 0.75 inches (19
mm), use wire strippers to remove that amount of insulation.
b) Attach the negative cables to the negative terminals of a DC power source, and attach the positive cables
to the positive terminals of the same power source.
If you are using combined power mode or power supply redundancy mode, connect all the power
supplies in the chassis to the same power source. If you are using input source redundancy mode
or full redundancy mode, connect half the power supplies to one DC power source and the other
half of the power supplies to another DC power source.
Note
Step 7
For the powered down circuits connected to the power supplies, turn on the power at the circuit breaker. The
Input 1 (IN1) and Input 2 (IN2) LEDs turn on each connected power supply.
Step 8
Turn on the power supply by setting the power switch to 1. The LEDs should flash and then the Output LED
should turn on in addition to the Input LEDs.
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.
Procedure
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 marked on the ring lug cable.
Note
Take care when connecting units to the supply circuit so that wiring is not overloaded.
Warning
Cisco Nexus 7718 Switch Site Preparation and Hardware Installation Guide
OL-30453-01
131
Installing or Replacing Modules, Fan Trays, and Power Supplies
Connecting a 3.5-kW HVAC/HVDC Power Supply to DC Power Sources