Precautions Specific To The Power Supply Assemblies; Identifying The Airflow Direction - IBM Storage Networking SAN128B-6 Installation, Service And User Manual

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
CAUTION:
Ensure that the airflow direction of the power supply unit matches that of the installed
fan tray. The power supplies and fan trays are clearly labeled with either a green arrow
with an "E", or an orange arrow with an "I."
CAUTION:
If you do not install a module or a power supply in a slot, you must keep the slot filler
panel in place. If you run the chassis with an uncovered slot, the system will overheat.
CAUTION:
Use a separate branch circuit for each power cord, which provides redundancy in case one
of the circuits fails.
CAUTION:
To prevent damage to the chassis and components, never attempt to lift the chassis using
the fan or power supply handles. These handles were not designed to support the weight
of the chassis.
Note: The equipment installation must meet NEC/CEC code requirements. Consult local authorities for
regulations.
Note: If the ambient temperature is above the recommended operational limits, the power supply units
shutdown, which in turn shuts down the device without any warning message.

Identifying the airflow direction

The power supply and fan assemblies are identified by the following airflow directions:
58
SAN128B-6 Installation, Service, and User Guide
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.