Juniper Networks manual Airflow Through Non-PoE Models of EX2200 Switches

Complete Hardware Guide for EX2200 Ethernet Switches

Figure 8: Airflow Through Non-PoE Models of EX2200 Switches

Chassis front

Fans

Chassis rear

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Figure 9 on page 16 shows the airflow in an EX2200 switch with network ports in which PoE is available.

Figure 9: Airflow Through PoE Models of EX2200 Switches

Chassis front

Fans Fan

Chassis rear

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Under normal operating conditions, the fans operate at reduced speed to reduce noise. Temperature sensors in the chassis monitor the temperature within the chassis. If any fan fails or if the temperature inside the chassis rises above the threshold, the switch raises an alarm and all functioning fans operate at a higher speed than normal. If the

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