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MX5, MX10, MX40, and MX80 Cooling System Description

 

The cooling system consists of the following components:

  • Fan tray

  • Air filter

The cooling system components work together to keep all router components within the acceptable temperature range (see Figure 1 and Figure 2). The router has one fan tray and one air filter that install vertically in the front of the router. The fan tray contains five fans.

The air intake to cool the chassis is located on the right side of the chassis next to the air filter. Air is pulled through the air filter toward the fan tray, where it is exhausted out the left side of the system. The power supplies are self-cooling and are located in the front of the router to the left of the front panel. The exhaust for the power supplies is located on the left side of the chassis.

Figure 1: Airflow Through the MX5, MX10, MX40, and MX80 Routers
Airflow Through the MX5,
MX10, MX40, and MX80 Routers

The chassis monitors the temperature of the router components. When the router is operating normally, the fans function at lower than full speed. If a fan fails or the ambient temperature rises above a threshold, the speed of the remaining fans is automatically adjusted to keep the temperature within the acceptable range. If the ambient maximum temperature specification is exceeded and the system cannot be adequately cooled, the Routing Engine shuts down the system by disabling output power from each power supply.

Figure 2: Fan Tray and Air Filter
Fan Tray and Air Filter