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Replacing a DC Power Supply
a) Holding the replacement power supply with one hand underneath the module and the other hand holding the handle,
align the back end of the power supply (the end with the electrical connections) to the open power supply slot and
slide the power supply all the way into the slot until it clicks into place.
b) Test the installation by trying to pull the power supply out of the slot without using the release latch.
If the power supply does not move out of place, it is secured in the slot. If the power supply moves, press it all the
way into the slot until it clicks in place.
Step 4
Connect the new power supply to an AC power source as follows:
a) Attach the power cable to the electrical outlet on the front of the power supply.
b) Connect the other end of the power cable to an AC power source.
• For no power redundancy, connect one power supply to one power source.
• For n+1 redundancy, connect two power supplies to one or two power sources.
• For n+n redundancy, connect each of two power supplies to a different power source.
Note
Depending on the outlet receptacle on your power distribution unit, you might need the optional jumper
cable to connect the switch to your outlet receptacle.
c) Verify that the power supply is operational by checking that the power supply OK LED is green.
Replacing a DC Power Supply
You can replace a DC power supply during operations so long as there is another power supply installed and
operating during the replacement. The switch requires only one power supply for operations, so you can hot
swap the redundant power supply during operations. If there is only one power supply installed in the chassis,
you can replace it by installing the new power supply in the open power supply slot and making it operational
before removing the other power supply. The module number can be found on the chassis.
Warning
Statement 1034 Backplane Voltage
Hazardous voltage or energy is present on the backplane when the system is operating. Use caution when
servicing.
Before you begin
• Verify that you have an ESD wrist strap or other device to prevent ESD damage to the components that
• Verify that you have an antistatic surface or antistatic bag for placing the power supply module that you
• Verify that the replacement power supply module has the same direction of airflow as the other modules
• Verify that the circuit breaker for the DC power source is turned off.
Cisco Nexus 3400 Hardware Installation Guide
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you touch.
remove from the chassis.
in the same chassis. Otherwise the switch can overheat and shut down.
Replacing Modules
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