Juniper Networks EX4200 - Manual (Page 57)

Cooling System and Airflow in an EX3200 Switch
The cooling system in an EX3200 switch consists of a field-replaceable unit (FRU)
fan tray with one fan (see Figure 20 on page 31). The fan tray is located at the rear
of the chassis and provides side-to-rear chassis cooling (see Figure 21 on page 31).
Figure 20: Fan Tray Used in an EX3200 Switch
Figure 21: Airflow Through the EX3200 Switch Chassis
Temperature sensors in the chassis monitor the temperature within the chassis. The
system raises an alarm if the fan fails or if the temperature inside the chassis rises
above permitted levels. If the temperature inside the chassis rises above the threshold,
the system shuts down automatically and the temperature shutdown LED on the
Cooling System and Airflow in an EX3200 Switch ■ 31
Chapter 2: Component Descriptions