Juniper SRX5400 Hardware Manual page 42

SRX5400 Services Gateway Hardware Guide
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Figure 13: Airflow Through the Chassis
The host subsystem monitors the temperature of the services gateway components.
When the device 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 14: Fan Tray
Figure 15: Air Filter
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