Juniper Networks EX4200 - Manual (Page 113)

Chapter 5
Mounting and Clearance Requirements
■ Rack Requirements for EX3200 and EX4200 Switches on page 87
■ Cabinet Requirements for EX3200 and EX4200 Switches on page 89
■ Requirements for Mounting an EX3200 or EX4200 Switch on a Desktop or
Wall on page 90
■ Clearance Requirements for Airflow and Hardware Maintenance for EX3200 and
EX4200 Switches on page 91
Rack Requirements for EX3200 and EX4200 Switches
You can mount the switch on two-post racks or four-post racks.
Rack requirements consist of:
■ Rack type
■ Mounting bracket hole spacing
■ Rack size and strength
■ Rack connection to the building structure
Table 27 on page 87 provides the rack requirements and specifications for the switch.
Table 27: Rack Requirements and Specifications for the Switch
Guidelines Rack Requirement
Use a four-post rack or a two-post rack. You can mount the switch on any four-post or two-post rack
that provides bracket holes or hole patterns spaced at 1 U (1.75 in./4.45 cm) increments and that meets
the size and strength requirements to support the weight.
A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document
number EIA-310–D) published by the Electronics Industry Association (
http://www.eia.org ).
With adequate cooling air and airflow clearance, you can mount 42 switches in a four-post rack or a
two-post rack that has a height of at least 42 U. In all cases, the rack must meet the strength requirements
to support the weight.
Rack type
The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the switch can be
mounted in any rack that provides holes spaced at that distance. Mounting bracket
hole spacing
Rack Requirements for EX3200 and EX4200 Switches ■ 87