Chapter 7. Power Supply Assemblies
The power supply assembly units in the SAN128B-7 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.
1. Power Supply #2
2. Grounding Screw
3. Handle
4. AC Input Status LED
5. Locking Tab
6. Airflow Label
7. DC Output Status LED
8. Power Cord Receptacle
Figure 35. SAN128B-7 power supply assembly
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.
Precautions specific to the power supply assemblies
DANGER: Make sure that the power source circuits are properly grounded,
then use the power cord supplied with the device to connect it to the power
source.
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Copyright IBM Corp. 2022
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