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Installing a DC Power Supply
• An AC power source must be within reach of the power cable that will be used with the replacement
• There must be an earth ground connection to the chassis that you are installing the replacement module.
Step 1
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 open
Note
slot.
Step 2
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.
Step 3
Attach the power cable to the electrical outlet on the front of the power supply.
Step 4
Make sure that the other end of the power cable is attached to the appropriate power source for the power supply.
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.
Step 5
Verify that the power supply is operational by making sure that the power supply
what the power supply LEDs indicate, see
Installing a DC Power Supply
This topic is for installing the 48-V DC power supply into switch chassis.
You can replace one power supply while the other one provides power to the switch.
Before you begin
• The circuit breaker for the DC power source for the power supply must be turned off.
Cisco Nexus 93128TX ACI-Mode Switch Hardware Installation Guide
44
Note
DC power supplies with green coloring have the same port-side intake airflow
direction as the power supplies with red coloring, and DC power supplies with
gray coloring have the same port-side exhaust airflow direction as the power
supplies with blue coloring. If the power supply that you are replacing has a
different color handle than the replacement power supply, verify that it has or
will have the same airflow direction as the other modules in the switch.
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. Otherwise, only one power source is required.
Typically, the chassis is grounded by its metal-to-metal connection with a grounded rack. If you need to
ground the chassis, see
Grounding the Chassis, on page
Power Supply LEDs, on page
25.
LED is green. For information on
61.
Replacing Modules
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