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Cisco Nexus 2000 Series Hardware Installation Guide
Chapter4 Installing a Cisco Nexus Fabric Extender
Removing and Installing Components
Note If you power up a FEX with power supply and fan tray modules that have different directions of airflow,
an error condition will occur and the switch can over heat and shut down. With this error condition, you
must shut down the switch to replace the modules that do not take in cool air from the cold aisle. After
you ensure that all of the modules have the same direction of airflow and that they take in cooling air
from the cold aisle, you can power up the FEX.
This section includes the following topics:
•Removing an AC Power Supply, page4-17
•Installing an AC Power Supply, page4-17
•Removing a DC Power Supply, page4-18
•Installing a DC Power Supply, page4-19
Note You can replace a faulty power supply while the system is operating if the other power supply is
functioning.
Removing an AC Power Supply
Caution If you are using the Cisco Nexus 2000 or 2300 Series FEX with one power supply, removing the power
supply causes the device to shut down. If you are using two power supplies and you remove one of them,
the device continues to operate.
To remove an AC power supply, follow these steps:
Step1 Pull the power cord out from the power receptacle on the power supply.
Step2 Release the power supply from the chassis as follows:
•If you are removing a power supply from a Cisco Nexus 2148T chassis, loosen the captive screw
and then pull the power supply part way out of the chassis.
•If you are removing a power supply from a Cisco Nexus 2248T, 2232PP, or 2224TP chassis, push
and hold the thumb latch to the left and pull the power supply part way out of the chassis.
Step3 Place your other hand under the power supply to support it while you slide it out of the chassis.
Step4 If the power supply bay is to remain empty, install a blank power supply filler panel.
Installing an AC Power Supply
Caution Be sure that the power supply that you are installing has the same airflow direction as the fan tray module
and the other power supply. Either all of the modules must have port-side exhaust airflow (blue or no
color on the front of the module) or all of the modules must have port-side intake airflow (red or black
color on the front of the module). To prevent over heating, the switch does not support more than one
airflow direction for the modules in the chassis.