Chassis and Power Supplies
Chassis Airflow
OmniSwitch 7700/7800 Hardware Users Guide
April 2005
page 2-37
Power Supply Fans
The chassis fan tray does not regulate power supply temperature. Instead, a cooling fan is installed in each
power supply. Because power supply bays are self-contained, each fan operates independently, cooling
only its associated power supply. Refer to the diagram below for more information.
Airflow for Power Supplies
See
for detailed power supply front panel and LED information.
1. Air Intake.
The fan unit,
located behind each power
supply front panel, pulls air
from the air intake vent.
2. Airflow.
The air from the
intake vent is directed front-
to-back through the power
supply housing. The airflow
provides required cooling for
the power supply’s internal
components.
3. Air Exhaust.
Airflow is
exhausted through a corre-
sponding vent in the rear
panel of the chassis. Refer
to pages
vent locations.
Note:
For OS7700 switches only,
airflow for the top power
supply is exhausted through
the chassis fan tray.
OS7700 Switch
OS7800 Switch