Juniper Networks EX3200 Instrukcja Użytkownika Pobierz pdf (Strona 114)

Table 27: Rack Requirements and Specifications for the Switch (continued)

GuidelinesRack Requirement

■

Ensure that the rack complies with one of these standards:

■

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.eia.org).

■

A 600-mm rack as defined in the four-part Equipment Engineering (EE); European

telecommunications standard for equipment practice (document numbers ETS 300 119-1 through

119-4) published by the European Telecommunications Standards Institute

(http://www.etsi.org).

The horizontal spacing between the rails in a rack that complies with this standard is usually

wider than the switch's mounting brackets, which measure 19 in. (48.2 cm) from outer edge

to outer edge. Use approved wing devices to narrow the opening between the rails as required.

■

Ensure that the rack is one of the following standard lengths:

■

23.62 in. (600 mm)

■

30 in. (762 mm)

■

21.5 in. (546 mm)

■

Ensure that the rack rails are spaced widely enough to accommodate the switch chassis' external

dimensions of 1.75 in. (4.45 cm) height, 17.5 in. (44.5 cm) width, and 10.5 in. (26.7 cm) depth.

The outer edges of the front-mounting brackets extend the width to 19 in. (48.2 cm).

The spacing of rails and adjacent racks must also allow for the clearances around the switch and

rack.

■

The rack must be strong enough to support the weight of the switch.

■

Ensure that the spacing of rails and adjacent racks allows for the proper clearance around the

switch and rack.

Rack size and

strength

■

Secure the rack to the building structure.

■

If earthquakes are a possibility in your geographical area, 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

One pair of mounting brackets for mounting the switch on two posts is supplied with

each switch. You can order a four-post rack-mount kit separately.

Related Topics ■ Chassis Physical Specifications for EX3200 and EX4200 Switches on page 7

■ Rack-Mounting and Cabinet-Mounting Warnings for EX Series Switches on

page 221

■ Clearance Requirements for Airflow and Hardware Maintenance for EX3200 and

EX4200 Switches on page 91

■ Mounting an EX3200 or EX4200 Switch on Two Posts in a Rack or Cabinet on

page 118

■ Mounting an EX3200 or EX4200 Switch on Four Posts in a Rack or Cabinet on

page 121

■ Mounting an EX3200 or EX4200 Switch in a Recessed Position in a Rack or

Cabinet on page 124

88 ■ Rack Requirements for EX3200 and EX4200 Switches

Complete Hardware Guide for EX3200 and EX4200 Ethernet Switches

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