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Chapter 4
Replacing Components
Replacing or Installing Power Supplies
Figure 4-7
Positioning the Module in the Cisco Nexus 5010 Chassis
Replacing or Installing Power Supplies
The Cisco Nexus 5500 Platform switches and the Cisco Nexus 5000 Platform switches support two
front-end AC or DC power supplies, but may be used with one power supply. The switches each require
one power supply, but you can include a second power supply for power redundancy. If you use only one
power supply, you must fill the second power supply slot with a blank module to maintain the designed
airflow.
If you need to replace an existing power supply, follow the procedures that explain how to remove and
install power supplies. If you are installing a new power supply where one did not exist before, follow
the installation procedure.
You can use port-side exhaust airflow power supply modules for all Cisco Nexus 5000 and 5500 switches
and you can alternatively use port-side intake airflow power supply modules with the Cisco Nexus
5548UP switch.
Caution
The Cisco Nexus 5000 and 5500 switches do not support modules using two different directions of
airflow. If you power up a switch with modules using more than one airflow direction, you must power
down the switch before replacing the modules that do not take in air from the cold aisle. When all of the
modules have the same direction of airflow and they are positioned to take in coolant air from the cold
aisle, you may power up the switch.
Modules with port-side intake airflow have a black stripe and modules with port-side intake airflow do
Note
not have a colored stripe.
Cisco Nexus 5000 Series Hardware Installation Guide
4-8