Juniper XRE200 -, Руководство по оборудованию

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Rack requirements consist of:
•
Rack type
•
Mounting bracket hole spacing
•
Rack size and strength
•
Rack connection to the building structure
Table 21 on page 56 provides the rack requirements and specifications.
Table 21: Rack Requirements and Specifications
Guidelines Rack Requirement
You can mount the device on a rack that provides bracket holes or hole patterns spaced at 1-U
(1.75 in. or 4.45 cm) increments and meets the size and strength requirements to support the
weight.
A U is the standard rack unit defined by the Electronic Components Industry Association
( http://www.ecianow.org ).
Rack type
The holes in the mounting brackets are spaced at 1-U (1.75 in. or 4.45 cm), so that the device
can be mounted in any rack that provides holes spaced at that distance.
Mounting bracket
hole spacing
•
Ensure that the rack complies with the size and strength standards of a 19-in. rack as defined
by the Electronic Components Industry Association ( http://www.ecianow.org ).
•
Ensure that the rack rails are spaced widely enough to accommodate the external dimensions
of the device chassis. The outer edges of the front mounting brackets extend the width of
the chassis to 19 in. (48.2 cm).
•
The rack must be strong enough to support the weight of the device.
•
Ensure that the spacing of rails and adjacent racks provides for proper clearance around the
device and rack.
Rack size and
strength
•
Secure the rack to the building structure.
•
If your geographical area is earthquake-prone, secure the rack to the floor.
•
Secure the rack to the ceiling brackets as well as wall or floor brackets for maximum stability.
Rack connection to
building structure
SEE ALSO
Rack-Mounting and Cabinet-Mounting Warnings | 141
56