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Replacing a DC Power Supply
Before You Begin
• The replacement power supply must have the same wattage and airflow direction as the power supply
• An DC power source must be within reach of the power cables that will be used with the replacement
• There must be an earth ground connection to the chassis in which you are installing the replacement
Step 1
Remove a DC power supply as follows:
a) Turn off the circuit breaker for the power feed to the power supply that you are replacing.
Be sure that the LEDs turn off on the power supply that you are removing.
b) Remove the DC power connector block from the power supply by doing the following:
1 Push the orange plastic button on the top of the connector block inward toward the power supply.
2 Pull the connector block out of the power supply.
c) Grasp the power supply handle while pressing the release latch towards the power supply handle.
d) Place your other hand under the power supply to support it while you slide it out of the chassis.
Caution
Do not touch the electrical connections on the back side of the module and prevent anything else from
coming into contact with and damaging the connectors.
Step 2
Install the replacement power supply as follows:
a) Holding the replacement power supply with one hand underneath the module and the other hand holding the handle,
turn the power supply so that its release latch is on the right side and align the back end of the power supply (the end
with the electrical connections) to the open power supply slot before carefully sliding the power supply all the way
into the slot until it clicks into place.
If the power supply does not fit into the open slot, turn the module over before sliding it carefully into the
Note
open slot.
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, carefully press
it all the way into the slot until it clicks in place.
c) Attach the power connector block end of the power cable to the electrical outlet on the front of the power supply.
d) Turn on the circuit breaker for the power source.
Cisco Nexus 93180YC-FX NX-OS Mode Switch Hardware Installation Guide
34
being replaced. Do not mix AC, DC, and HVAC/HVDC power supplies in the same switch.
Note
You can determine the airflow direction by looking at the coloring of the latch on each
power supply.To incicate the direction of airflow, some DC power supplies have green
or gray latches, and other DC power supplies have burgundy or blue latches. Green and
burgundy latches indicate port-side intake airflow, and gray and blue latches indicate
port-side exhaust airflow.
power supply. If you are using n+n power redundancy, there must be a separate power source for each
power supply installed in the chassis.
power supply. DC power supplies connected to DC power sources have three power cables (two for DC
power and one for grounding).
Replacing Components
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