Figure 22: Fan Tray Used in an EX 4200 Switch
Figure 23: Airflow Through the EX 4200 Switch Chassis
The fan tray used in an EX 4200 switch comes with load-sharing redundancy that
can tolerate a single fan failure at room temperature (below 45° C/113° F) to still
provide sufficient cooling.
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
rear panel is lit. You can see the status of fans and the temperature from the
Environment Status menu on the LCD panel.
Related Topics ■ Field-Replaceable Units in EX-series Switches on page 99
■ EX 4200 Switch—Rear-Panel Description on page 12
■ Installing a Fan Tray in an EX-series Switch on page 110
Cooling System in an EX 4200 Switch ■ 33
Chapter 1: Switch Overview
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