• An AC power source must be within reach of the power cable that will be used with the replacement
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.
• There must be an earth ground connection to the chassis that you are installing the replacement module.
Typically, the chassis is grounded by its metal-to-metal connection with a grounded rack. If you need to
ground the chassis, see
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
slot.
Note
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.
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.
Note
Step 5
Verify that the power supply is operational by making sure that the power supply
LED is green. For information on
what the power supply LEDs indicate, see
.
Installing an HVAC/HVDC Power Supply
You can replace one power supply while the other one provides power to the switch.
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. HVAC/HVDC power supplies automatically use the same airflow
direction as the installed fan modules. 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.
Note
Before you begin
• If you are using DC power for the replacement power supply, the circuit breaker for the power feed to
the power supply that you are replacing must be turned off.
Replacing Modules
5
Replacing Modules
Installing an HVAC/HVDC Power Supply
