Power Supply Assemblies
The power supply assembly units in the SAN128B-6 chassis can be removed and replaced without special tools. The device can continue operating during the replacement.
The device supports the following types of power supplies.
- AC power supply with nonport-side air exhaust. This unit moves the air from the port-side to the nonport-side of the device.
- AC power supply with nonport-side air intake. This unit moves
the air from the nonport-side to the port-side of the device.
Figure 1. AC power supply assembly 
- Power supply unit FAIL LED
- Power supply unit handle
- AC power cable receptacle
- Power supply assembly latch
- Power supply unit OK LED
Note: The two power supply assemblies concurrently installed in the
chassis must be of the same power type, model (airflow direction),
and part number. If the airflow directions are different, an error
is generated on the console.
Note: The power supply assembly units are hot-swappable if they are
replaced one at a time. They are identical and fit into either slot.
Note: The device can operate all the ports with one power supply assembly
unit if you do not require redundancy.
Each power supply unit has one internal fan.