Each VSP 7400 Series switch runs with two replaceable internal power supply units that provide all of the power needed for the switch to operate. You can remove one power supply without interrupting the switch's operation.
The power supply units can be both AC power supplies, DC power supplies, or an AC and a DC power supply.
For more information, see the following topics.
Note
The power supply slot on the left is for power supply number two and the power supply slot on the right is for power supply number one.