Table 25: Rack Requirements and Specicaons
(Connued)
Rack Requirement Guidelines
Mounng bracket hole
spacing
Ensure that the holes in the mounng 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 that
are spaced at that distance.
The front rack opening between the anges must be 450 mm wide + 2 mm
(17.75 in. + 0.08 in.).
Rack size and strength
• Ensure that the rack complies with the standards for a 19 in. rack as dened
in Cabinets, Racks, Panels, and Associated Equipment (document number
EIA-310–D) published by the Electronics Industry Associaon.
• Use an 800 mm rack as dened in the four-part Equipment Engineering (EE)
European telecommunicaons standard for equipment pracce (document
numbers ETS 300 119-1 through 119-4) published by the European
Telecommunicaons Standards Instute (hp://www.etsi.org).
The horizontal spacing between the rails in a rack compliant with this
standard is usually wider than the device's mounng brackets. The mounng
brackets measure 19 in. (48.26 cm) from outer edge to outer edge. Use
approved wing devices to narrow the opening between the rails as required.
•
Ensure that the rack rails are spaced widely enough to accommodate the
external dimensions of the device chassis. The outer edges of the front-
mounng brackets extend the width to 19 in. (48.26 cm).
•
Ensure that for four-post installaons, the front and rear rack rails are
spaced between 23.6 in. (60 cm) and 36 in. (91.4 cm) front-to-back.
• Ensure that the rack is strong enough to support the weight of the device. A
fully-congured SRX1600 with 2 PSUs weighs about 17.86 lb (8.1 kg).
• Ensure that the spacing of rails and adjacent racks allows for proper
clearance around the device and rack.
Rack connecon to building
structure
• Secure the rack to the building structure.
• If earthquakes occur in your geographical area, secure the rack to the oor.
• Secure the rack to the ceiling brackets and to wall or oor brackets for
maximum stability.
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