Figure 10: Cooling System And Airflow In An Mx104 Router - Juniper MX104 Hardware Manual

MX104 3D Universal Edge Router Hardware Guide
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20
where it is exhausted out the left side of the system (see
exhaust for the power supplies is located on the left side of the chassis.

Figure 10: Cooling System and Airflow in an MX104 Router

Minimum
clearan ce
6 in .
(15.2 cm)
Pow er suppli es
The cooling system components work together to keep all router components within the
acceptable temperature range. 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.
Preparing the Site for the MX104 Router Overview on page 71
Maintaining the MX104 Air Filter on page 190
Rack Requirements for MX104 Routers on page 72
Cabinet Requirements for MX104 Routers on page 73
Clearance Requirements for Airflow and Hardware Maintenance on MX104 Routers
on page 75
MX104 Router Environmental Specifications on page 70
Front vi ew
Fan t ray Air fi lt er
Figure 10 on page 20). The
Minimum
clearan ce
6 in .
(15.2 cm)
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