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Connecting a 3-kW Universal AC/DC Power Supply to a DC Power Source
Connecting a 3-kW Universal AC/DC Power Supply to a DC Power Source
The 3-kW Universal AC/DC power supply can be connected to a 240-to-380-V DC circuit equipped with
positive, negative, and ground terminals. This procedure is for connecting the power supply to a DC power
source.
Before you begin
• The DC power source must be turned off at its circuit breaker.
• The power switch on the power supply must be turned off (power switch set to 0).
Step 1
Verify that the circuit breaker for the DC power source is turned off.
Step 2
Verify that the power switch on the power supply is turned off (0).
Step 3
Connect the ground terminal ring on the power cable to the ground terminal on the DC power source. Secure it in place
with a nut tightened to the appropriate torque setting for the terminal post.
Step 4
Connect the negative terminal ring on the power cable to the negative (-) terminal on the DC power source. Secure it in
place with a nut tightened to the appropriate torque setting for the terminal post.
Step 5
Connect the positive terminal ring on the power cable to the negative (+) terminal on the DC power source. Secure it in
place with a nut tightened to the appropriate torque setting for the terminal post.
Step 6
Connect the Saf-D-Grid connector on the other end of the power cable to the Saf-D-Grid receptacle on the power supply.
Step 7
Turn on the circuit breaker for the DC power source circuit.
Step 8
Turn on the power supply by pressing its power switch to on (1).
Step 9
Verify that the Output Power LED turns on and becomes green.
What to do next
After you finish connecting the power supplies to the power source and the power supplies are operating, you
connect the switch to the network.
Connecting a 3-kW DC Power Supply to a DC Power Source
For no power redundancy or n+1 power redundancy, you connect the power supplies in the switch to the same
power grid. For n+n power redundancy, you connect half of the power supplies to one power grid and the
other half of power supplies to another power grid. Grid A power supplies are on the left side of the switch
and grid B power supplies are on the right side of the switch).
Before you begin
• The power supplies must be installed in the chassis.
• The power supplies must be close enough to be connected to the DC power source using the
• Four 6-AWG lugs that are provided with the switch.
• Customer-provided equipment and tools must include the following:
Cisco Nexus 9516 NX-OS Mode Switch Hardware Installation Guide
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customer-provided power cables.
Installing a Chassis
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