Mx240 Router Cabinet Size And Clearance Requirements - Juniper MX240 Hardware Manual

For service personnel to remove and install hardware components, there must be adequate space at the
front and back of the router. At least 24 in. (61 cm) is required both in front of and behind the router.
NEBS GR-63 recommends that you allow at least 30 in. (72.6 cm) in front of the rack and 24 in. (61.0 cm)
behind the rack.
Airflow must always be from front to back with respect to the rack. If the device has side to rear airflow,
then provisions must be made to ensure that fresh air from the front of the rack is supplied to the inlets,
and exhaust exits the rear of the rack. The device must not interfere with the cooling of other systems
in the rack. Fillers must be used as appropriate in the rack to ensure there is no recirculation of heated
exhaust air back to the front of the rack. Care must also be taken around cables to ensure that no leakage
of air in situations where recirculation may result.
Figure 44: Chassis Dimensions and Clearance Requirements

MX240 Router Cabinet Size and Clearance Requirements

The minimum-sized cabinet that can accommodate the router is 482-mm wide and 800-mm deep. A cabinet
larger than the minimum requirement provides better airflow and reduces the chance of overheating. To
accommodate a single router, the cabinet must be at least 13 U high. If you provide adequate cooling air
and airflow clearance, you can stack several routers in a cabinet that has sufficient usable vertical space.
Each router requires 5 U.
The minimum total clearance inside the cabinet is 30.7 in. (780 mm) between the inside of the front door
and the inside of the rear door.
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