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Extreme 9920 Overview
DC power supply
Figure 4: Front view of a 1600W DC power supply
DC power cable
A DC power cord is provided with the DC power supply.
Figure 5: DC power cord provided with the DC power supply
Fan Modules for Use with the Extreme 9920
Five fan module slots accommodate five fan modules. Each fan module contains 2x80 mm fans that
provide front-to-back airflow to cool the chassis. All five fan modules must be installed for proper
cooling. The fans in each module create a negative pressure that is evenly distributed across the
interface modules. If a fan module fails, do not remove it until a replacement is available. When a fan
module is removed, the empty slot diminishes air flow in the places where it is needed, which can cause
interface modules to overheat and shutdown. The system can operate with an inoperable, but present,
fan module indefinitely, but it can only operate for a short period of time with one module removed.
9920 Network Packet Broker Hardware Installation Guide
DC power supply
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