Juniper EX3200 Series, Руководство по оборудованию, Страница: 87 / 310

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 35 on page 65 provides the cabinet requirements and specifications.
Table 35: Cabinet Requirements and Specifications
Guidelines
Cabinet
Requirement
• You can mount the device in a cabinet that contains a 19-in. rack as defined in Cabinets, Racks,
Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics
Industry Association ( http://www.ecianow.org/standards-practices/standards/ ).
• The minimum cabinet size must be able to accommodate the maximum external dimensions of the
device.
Cabinet size
• The outer edges of the mounting brackets extend the width of the chassis to 19 in. (48.2 cm).
•
The minimum total clearance inside the cabinet is 30 in. (76.2 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
Related
Documentation
Rack-Mounting and Cabinet-Mounting Warnings on page 248
•
Requirements for Mounting an EX3200 Switch on a Desktop or Wall
You can install the switch on or under a desk or other level surface or on a wall. When
choosing a location, allow at least 6 in. (15.2 cm) of clearance between the front and
back of the chassis and adjacent equipment or walls.
65 Copyright © 2016, Juniper Networks, Inc.
Chapter 6: Preparation Overview