Chassis and Power Supplies
Chassis Airflow
OmniSwitch 7700/7800 Hardware Users Guide
April 2005
page 2-35
Chassis Airflow
The fan tray pulls air from the air intake vents located at the bottom-front and left and right sides of the
chassis. The air is directed vertically through the chassis’ module compartment and past the NI and CMM
circuit boards. Airflow is then exhausted through the fan tray at the top-rear of the chassis.
Important.
Maintain a clearance of at least six inches at the front and back of the chassis, as well as at the
left and right sides. Otherwise, airflow may become restricted. Restricted airflow can cause your switch to
overheat; overheating can lead to switch failure.
The figure below provides illustrated airflow diagrams for OS7800 switches. See
OS7700 airflow diagram. See
for an airflow diagram describing the chassis’ power supply bays.
Airflow for OS7800 Switches
1. Air Intake.
The fan tray
pulls air from the three air
intake vents located at the
bottom of the chassis.
2. Airflow.
The air from the
intake vents is directed up
through the chassis’ module
compartment and past the NI
and CMM circuit boards.
This airflow provides
required cooling for the mod-
ules and other chassis com-
ponents.
3. Air Exhaust.
The air-
flow is exhausted through
the fan tray at the rear of
the chassis.
Air Intake Vents
Chassis Module
Compartment
Fan Tray
