Dell PowerConnect J-EX4200, Hardware Manual

Page: 81 / 238

Table 27: Cabinet Requirements and Specifications for the Switch
Guidelines Cabinet Requirement
• You can mount the switch in a cabinet that contains 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 ).
NOTE: The rack must meet the strength requirements to
support the weight of the switch. A fully configured J-EX4200
switch weighs up to 22 lb (10 kg). If you mount multiple units
in one rack, that rack must support the total weight of the
units.
• The minimum cabinet size must be able to accommodate
the maximum external dimensions of the switch.
Cabinet size
• The outer edges of the mounting brackets extend the width
of the chassis to 19 in. (48.3 cm).
• The minimum total clearance inside the cabinet is 30 in.
(76.2 cm) between the inside of the front door and the inside
of the rear door.
Cabinet clearance
When you mount the switch in a cabinet, ensure that
ventilation through the cabinet is sufficient to prevent
overheating.
•
Ensure adequate cool air supply to dissipate the thermal
output of the switch or switches.
• Ensure that the cabinet allows the chassis hot exhaust air
to exit the cabinet without recirculating into the switch. 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 switch in the cabinet in a way that maximizes the
open space on the side of the chassis that has the hot air
exhaust. This maximizes the clearance for critical airflow.
• 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 switch and cabinet as
specified in “Clearance Requirements for Airflow and
Hardware Maintenance for J-EX4200 Switches” on page 66.
• A cabinet larger than the minimum required provides better
airflow and reduces the chance of overheating.
Cabinet airflow requirements
Related
Documentation
Clearance Requirements for Airflow and Hardware Maintenance for J-EX4200 Switches
on page 66
•
•
Rack Requirements for J-EX4200 Switches on page 63
•
Mounting a J-EX4200 Switch on Two Posts in a Rack or Cabinet on page 92
65
Chapter 5: Mounting and Clearance Requirements