Figure 10 on page 36 shows the alarm relay contacts in EX9200 switches.
Figure 10: Alarm Relay Contacts in EX9200 Switches
Midplane in an EX9200 Switch
The midplane is located on the rear of the chassis and forms the rear of the card cage. The Switch Fabric
modules (SF modules) and line cards are installed into the midplane from the front of the chassis, and
the power supplies install into the midplane from the rear of the chassis. The cooling system
components also connect to the midplane.
The midplane performs the following major funcons:
• Provides a data path—Data packets are transferred across the midplane between the line cards
through the Switch Fabric on the host subsystem.
• Distributes power—The power supplies connect to the midplane, which distributes power to all the
switch components.
• Provides a signal path—The midplane provides the signal path to the line cards, Switch Fabric, and
other system components for monitoring and control of the system.
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