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Mounting OS6855-14 and OS6855-U10 Switches
Recommended Clearances
Always allow adequate clearance at the front, rear, top, and sides of the switch. The following table shows
the recommended minimum clearances for adequate chassis cooling and access to cabling and
components at the front and rear of the chassis.
Location
OS6855-14
Top
0.875 inches (1/2 RU) for switches
operating in an ambient room temperature
of 60°C or less. 3.5 inches (2 RU) for
switches operating in an ambient room
temperature of 70°C (maximum allowable).
Bottom
No minimum clearance required. However,
be sure that the bottom of the chassis is not
in direct contact with any equipment below.
Sides
2 inches
Rear
6 inches (see note below)
Front
6 inches (see note below)
Note. Clearance recommendations at the front and rear of chassis are for access to cabling and
components only and are not intended as a specific airflow requirement.
Mechanical Loading
Mounting of the equipment in the rack should be such that a hazardous condition is not achieved due to
uneven mechanical loading.
Circuit Overloading
Consideration should be given to the connection of the equipment to the supply circuit and the effect that
overloading of the circuit might have on overcurrent protection and supply wiring. Appropriate consider-
ation of equipment nameplate ratings should be used when addressing this concern.
Reliable Earthing
Reliable earthing of rack-mount equipment should be maintained. Particular attention should be given to
supply connections other than direct connections to the branch circuit (e.g. use of power strips).
OmniSwitch 6855 Series Hardware Users Guide
OS6855-U10
0.875 inches (1/2 RU) for switches
operating in an ambient room temperature
of 60°C or less. 3.5 inches (2 RU) for
switches operating in an ambient room
temperature of 70°C (maximum allowable).
No minimum clearance required. However,
be sure that the bottom of the chassis is not
in direct contact with any equipment below.
2 inches
6 inches (see note below)
6 inches (see note below)
March 2009
General Installation Recommendations
page 4-3
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