Juniper NFX150, Руководство по оборудованию

Страница: 49 / 152

One pair of mounting brackets for mounting the device on two posts of a rack is supplied
with each device. For mounting the device on four posts of a rack or cabinet, you can
order a four-post rack-mount kit separately.
See Also NFX150 Chassis on page 24
•
•
Clearance Requirements for Airflow and Hardware Maintenance for an NFX150 Device
on page 45
•
Rack-Mounting and Cabinet-Mounting Warnings on page 126
•
Mounting an NFX150 Device on Two Posts in a Rack on page 71
•
Mounting an NFX150 Device on Four Posts in a Rack or Cabinet
Cabinet Requirements for an NFX150 Device
You can mount the NFX150 device in an enclosure or cabinet that contains a four-post
19-in. open rack as defined in
Cabinets, Racks, Panels, and Associated Equipment
(document number EIA-310-D) published by the Electronics Industry Association.
Cabinet requirements consist of:
•
Cabinet size and clearance
•
Cabinet airflow requirements
Table 24 on page 49 provides the cabinet requirements and specifications for the NFX150
device.
Table 24: Cabinet Requirements for the NFX150 Device
Guidelines Cabinet Requirement
The minimum cabinet size for accommodating an NFX150 device is 36 in. (91.4 cm)
deep. Large cabinets improve airflow and reduce the chance of overheating. Cabinet size and clearance
When you mount the NFX150 device in a cabinet, ensure that ventilation through
the cabinet is sufficient to prevent overheating.
• Ensure that the cool air supply you provide through the cabinet adequately
dissipates the thermal output of the NFX150 device.
• Ensure that the cabinet allows the chassis hot exhaust air to exit the cabinet
without recirculating into the NFX150 device. An open cabinet (without a top or
doors) that employs hot air exhaust extraction from the top allows 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 NFX150 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 allows for the proper
clearance around the NFX150 device and cabinet.
• A cabinet larger than the minimum required provides better airflow and reduces
the chance of overheating.
Cabinet airflow requirements
49 Copyright © 2018, Juniper Networks, Inc.
Chapter 2: Site Planning, Preparation, and Specifications