H3C WX2540E, Руководство по установке

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4
• A conduction pattern of capacitance coupling.
•
Inductance coupling.
•
Electromagnetic wave radiation.
• Common impedance (including the grounding system) coupling.
To prevent EMI, perform the following tasks:
•
If AC power is used, use a single-phase three-wire power receptacle with protection earth (PE) to
filter interference from the power grid.
• 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.
Lightning protection
To protect the device from lightning, follow these guidelines:
•
Make sure the chassis is reliably grounded by using the grounding cable.
• Make sure the grounding terminal of the AC power receptacle is reliably grounded.
• Install a lightning protector at the power input end.
Installation accessories
Power cable
(provided) Power adapter
(provided) Rubber feet
(provided)
Grounding
terminal
(provided)
Console cable
(provided)
Grounding
cable
(user-supplied)
Pre-installation checklist
Table 4 Pre-installation checklist
Item Requirements Result
Installation
site
Ventilation
•
There is a minimum of 10 cm (3.9 in) of clearance
around the device.
•
A ventilation system is available at the installation site.
Temperature 0°C to 40°C (32°F to 104°F)
Relative humidity 5% to 95% (noncondensing)
Cleanness
•
Dust concentration ≤ 3 × 10 4 particles/m 3
•
No dust on desk within three days