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Table 29: Cabinet Requirements and Specifications for the Switch
GuidelinesCabinetRequirement
•
Youcanmounttheswitchinacabinetthatcontainsa19-in.
rackasdefined in Cabinets,Racks, Panels,and Associated
Equipment (documentnumber EIA-310–D)published by
theElectronicsIndustryAssociation(http://www.eia.org).
NOTE: The rack must meet the strengthrequirements to
support the weightof the switch.
•
Theminimum cabinetsize must be ableto accommodate
the maximumexternaldimensions of the switch.
Cabinetsize
•
Theouteredgesofthemountingbracketsextendthewidth
of the chassisto19 in. (48.3cm).
•
Theminimum totalclearanceinside the cabinet is 30 in.
(76.2cm)betweentheinsideofthefrontdoorandtheinside
of the reardoor.
Cabinetclearance
Whenyou mount the switchin a cabinet,ensure that
ventilationthrough the cabinetis sufficient toprevent
overheating.
•
Ensureadequate coolair supply todissipate the thermal
output of the switch or switches.
•
Ensurethat the cabinetallows the chassishot exhaustair
toexit the cabinetwithout recirculatingintothe switch.An
opencabinet(without a topordoors) thatemployshot air
exhaustextractionfrom the topallowsthe bestairflow
throughthe chassis.If the cabinet containsa topor doors,
perforationsintheseelementsassistwithremovingthehot
air exhaust.
•
Installtheswitchinthecabinetinawaythatmaximizesthe
open spaceon the side of the chassisthathas the hot air
exhaust.Thismaximizes the clearance forcritical airflow.
•
Route and dressall cables tominimize the blockageof
airflow toand from the chassis.
•
Ensurethatthespacingofrailsandadjacentcabinetsallows
forthe proper clearance around the switch and cabinet.
•
Acabinetlargerthantheminimumrequiredprovidesbetter
airflow and reduces the chanceof overheating.
Cabinetairflowrequirements
Related Topics Clearance Requirements for Airflow and Hardware Maintenance for EX3200 and
EX4200 Switches on page 96
•
• Rack Requirements for EX3200 and EX4200 Switches on page 93
• Mounting anEX3200 orEX4200Switchon TwoPostsin aRackorCabinetonpage122
Requirements for Mounting an EX3200 or EX4200 Switch on a Desktop or Wall
You can install the switchon a desktop or wall. When choosing a location, allowat least
6 in. (15.2 cm) of clearance between the front and back of the chassis and adjacent
equipment or walls.
95Copyright©2010, JuniperNetworks, Inc.
Chapter5:Mounting andClearanceRequirements