Cisco 7600-SIP-400 - SPA Interface Processor 400 - Cisco 7600 Series Router Components; Cisco 7606 Router; Cisco 7606-S Router; Cisco 7609 Router

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Cisco 7600 Series Router Installation Guide
OL-4503-26
Chapter 1 Product Overview
Cisco 7600 Series Router Components
• PEM, page 1-32
Fan Assembly
The system fan assembly, located in the chassis, provides cooling air for the supervisor engine and
the
switching modules. Figure 1-13 (Cisco 7603 router), Figure 1-14 (Cisco 7603-S router), Figure 1-15
(Cisoc 7604 router), Figure 1-16 (Cisco 7606 router), Figure 1-17 (Cisco 7606-S router), and
Figure 1-18 (Cisco 7609 router and Cisco 7609-S router) show the direction of airflow into and out of
the router. Sensors on the supervisor engine monitor the internal air temperatures. If the air temperature
exceeds a preset threshold, the environmental monitor displays warning messages.
If an individual fan within the assembly fails, the FAN STATUS LED turns red. To replace a fan
assembly, see the
“Removing and Replacing the Fan Assembly” section on page 5-119.
Note Refer to the Cisco 7600 Series Router Supervisor Engine and Route Switch Processor Guide for
information on environmental monitoring.
Figure 1-13 Cisco 7603 Router Internal Airflow
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63182
Module air
inlet
Module air
exhaust