Juniper XRE200 -, Hardware Manual

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Figure 9: Airflow in the XRE200 External Routing Engine
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Air intake
Air intake
Power supplies
air exhaust
F
an
tr
a
y
Top view
Left side
Right side
Rear Front
Temperature sensors in the chassis monitor the temperature within the chassis. If the ambient temperature
rises above the threshold 30°C, the speed of the working fans is automatically adjusted to keep the
temperature within the acceptable range, 5°C through 40°C. The system raises an alarm if the fan fails or
if the temperature inside the chassis rises above permitted temperature thresholds. The alarm temperature
thresholds can be seen by entering the show chassis temperature-thresholds command.
If the ambient temperature inside the chassis rises above 75°C, the system shuts down automatically.
You can use the hardware chassis LEDs to monitor environmental status. See “Chassis LEDs on an XRE200
External Routing Engine” on page 30 .
RELATED DOCUMENTATION
Clearance Requirements for Airflow and Hardware Maintenance for an XRE200 External Routing
Engine | 58
Installing a Fan Module in an XRE200 External Routing Engine | 93
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