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Keep the switch far away from radio transmitting stations, radar stations, and high-frequency
•
devices.
Use electromagnetic shielding, for example, shielded interface cables, when necessary.
•
Route interface cables indoors.
•
Lightning protection
To better protect the switch from lightning, follow these guidelines:
•
Make sure the grounding cable of the chassis is well grounded.
Make sure the grounding terminal of the AC power receptacle is well grounded.
•
Installation preparation checklist
Table 5 Installation preparation checklist
Item
Installation
site
Requirements
•
Ventilation
•
Temperature
0°C to 45°C (32°F to 113°F)
Relative humidity
5% to 95% (noncondensing)
•
Cleanness
•
•
•
ESD prevention
•
•
•
•
EMI prevention
•
•
•
Lightning
•
protection
•
Electricity safety
•
There is a minimum clearance of 10 cm (3.9 in) around
the inlet and outlet vents for heat dissipation of the switch
chassis.
A ventilation system is available at the installation site.
Dust concentration ≤ 3 × 104 particles/m3
No dust on desk within three days.
The equipment and rack are well grounded.
The equipment room is dust-proof.
The humidity and temperature are at a proper level.
Wear an ESD-preventive wrist strap. Make sure the wrist
strap makes good skin contact and is well grounded.
Take effective measures to protect the power system from
the power grid system.
Separate the protection ground of the switch from the
grounding device or lightning protection grounding
device as far as possible.
Keep the switch far away from radio stations and radar
and high-frequency devices working in high current.
Use electromagnetic shielding when necessary.
The grounding cable of the chassis is well grounded.
The grounding terminal of the AC power receptacle is
well grounded.
Equip a UPS.
In case of emergency during operation, switch off the
external power switch.
5
Result