Juniper XRE200 -, Hardware Manual

Page: 57 / 188

Cabinet Requirements
You can mount the device in a cabinet that contains a 19-in. rack.
Cabinet requirements consist of:
•
Cabinet size
•
Clearance requirements
•
Cabinet airflow requirements
Table 22 on page 57 provides the cabinet requirements and specifications.
Table 22: Cabinet Requirements and Specifications
Guidelines Cabinet Requirement
•
The minimum cabinet size is 36 in. (91.4 cm) depth. Large cabinets improve airflow
and reduce chances of overheating.
Cabinet size
•
The outer edges of the front mounting brackets extend the width of the chassis to
19 in. (48.2 cm).
•
The minimum total clearance inside the cabinet is 30.7 in. (78 cm) between the inside
of the front door and the inside of the rear door.
Cabinet clearance
When you mount the device in a cabinet, ensure that ventilation through the cabinet is
sufficient to prevent overheating.
•
Ensure adequate cool air supply to dissipate the thermal output of the device or
devices.
•
Ensure that the hot air exhaust of the chassis exits the cabinet without recirculating
into the device. An open cabinet (without a top or doors) that employs hot air exhaust
extraction from the top ensures the best airflow through the chassis. If the cabinet
contains a top or doors, perforations in these elements assist with removing the hot
air exhaust.
•
Install the device in the cabinet in a way that maximizes the open space on the side
of the chassis that has the hot air exhaust.
•
Route and dress all cables to minimize the blockage of airflow to and from the chassis.
•
Ensure that the spacing of rails and adjacent cabinets is such that there is proper
clearance around the device and cabinet.
•
A cabinet larger than the minimum required provides better airflow and reduces the
chance of overheating.
Cabinet airflow
requirements
57