Removing A Dc Power Supply; Installing An Ac Power Supply - Cisco Nexus 93120TX Installation Manual

Removing a DC Power Supply

Warning Statement 1029—Blank Faceplates and Cover Panels
Blank faceplates and cover panels serve three important functions: they prevent exposure to hazardous
voltages and currents inside the chassis; they contain electromagnetic interference (EMI) that might disrupt
other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system unless
all cards, faceplates, front covers, and rear covers are in place.
Removing a DC Power Supply
If the switch has two power supplies, you can replace one power supply while the other one provides power
to the switch. If you have only one power supply in the switch, install the replacement power supply in the
open slot before removing the original power supply.
To disconnect the power supply from its power cables, you must shut off the power from the power source
and then either disconnect a connector for the power cables or release each of three cables from the power
supply (requires a standard screw driver).
Step 1 Turn off the circuit breaker for the power source to only the power supply that you are replacing (be sure that this does
not turn off power to the other power supply that is powering the switch during this replacement process).
Be sure that the LEDs turn off on the power supply that you are removing.
Step 2
Remove the power cable from the power supply by doing the following:
• If you need to remove an orange power cable connector from a 48-V DC power supply, do 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.
Step 3 Grasp the power supply handle while pressing the release latch towards the power supply handle.
Step 4 Pull the power supply out of the bay.
Step 5 If you cannot replace the power supply, fill the empty slot with a blank module (part number N2200-P-BLNK). Otherwise,
you are ready to install a power supply in the open slot.

Installing an AC Power Supply

Before You Begin
• The power supply that you are installing must be capable of using the same airflow direction as the fan
• An AC power source must be within reach of the power cable that will be used with the replacement
Cisco Nexus 93120TX NX-OS Mode Switch Hardware Installation Guide
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trays installed in the same 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.
Replacing Modules