H3C Technologies H3C S3100V2 Series Switches - Manual (Page 17)

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• Keep the switch far away from high-power radio launchers, radars, and equipment with high
frequency or high current.
• Use electromagnetic shielding, for example, shielded interface cables, when necessary.
• Route interface cables only indoors to prevent signal ports from getting damaged by over-voltage
or over-current caused by lightning strikes.
Grounding requirements
Using a good grounding system to protect your switch against lightning shocks, interferences, and ESD
is essential to the operating reliability of your switch. Make sure that the resistance between the chassis
and ground is less than 1.5 ohm. For more information about grounding the S3100V2 Switch Series, see
“ Grounding the switch .”
Cooling requirements
The cooling system of the S3100V2 Switch Series varies by the switch model:
• S3100V2-TP-SI/S3100V2-TP-EI (fanless): There are openings on the left, right, and rear of the switch
for natural heat dissipation.
• S3100V2-TP-PWR-EI (built-in fans): Fans blow air from the left to the right of the chassis for heat
dissipation, as shown in
Figure 15 .
Figure 15 Airflow through the S3100V2-TP-PWR-EI switch
(1) Air intake (2) Air exhaust
For adequate heat dissipation, plan the installation site according to the airflow of your switch, and
adhere to the following requirements:
• Leave a clearance of at least 10 cm (3.94 in) around the air intake and exhaust vents.
• Consider the heat dissipation of the installation site when determining air-conditioning
requirements to ensure that cool air can enter the switch.
• Make sure the hot air generated by equipment at the bottom of the rack is not drawn in the intake
of the equipment above.
• The installation site has a good cooling system.
Space requirements
For adequate ventilation and ease of maintenance, adhere to the following requirements:
• The clearance between the rack and walls or other devices is at least 1 m (3.28 ft).
• The headroom in the equipment room is no less than 3 m (9.84 ft).