H3C Technologies H3C WX5500E Series Access Controllers - Manual (Page 11)

5
• Use electromagnetic shielding, for example, shielded interface cables, when necessary.
Lightning protection
To better protect the device 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.
• Install a lightning protector at the input end of the power supply to enhance the lightning protection
capability of the power supply.
Accessories
Accessories are provided with the device.
Grounding cable M4 screw
Front mounting
bracket
Rear mounting
bracket
Rubber feet
Console cable
Cage nut (user
supplied)
M6 screw (user
supplied)
Cable tie (user
supplied)
ESD-preventive
wrist strap (user
supplied)
Installation preparation checklist
Table 4 Installation preparation checklist
Item Requirements Result
Installation
site
Ventilation
• There is a minimum clearance of 10 cm (3.9 in) around
the inlet and exhaust vents for heat dissipation of the
device chassis.
• A ventilation system is available at the installation site.
Temperature 0°C to 45°C (32°F to 113°F)
Relative humidity 5% to 95% (noncondensing)
Cleanness
• Dust concentration ≤ 3 × 10 4 particles/m 3
• No dust on desk within three days