Emi; Lightning Protection; Installation Accessories - H3C WX1800H Series Installation Manual

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Always wear ESD gloves and ESD garment and remove conductive objects such as jewelry or
watch before working with the device.

EMI

All electromagnetic interference (EMI) sources, from outside or inside of the device and application
system, adversely affect the device in the following ways:
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A conduction pattern of capacitance coupling.
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Inductance coupling.
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Electromagnetic wave radiation.
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Common impedance (including the grounding system) coupling.
To prevent EMI, use the following guidelines:
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Take effective measures to filter interference from the power grid.
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Keep the device far away from radio transmitting stations, radar stations, and high-frequency
devices.
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Use electromagnetic shielding, for example, shielded interface cables, when necessary.
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To prevent signal ports from getting damaged by overvoltage or overcurrent caused by lightning
strikes, route interface cables only indoors.

Lightning protection

To enhance lightning protection for the device, follow these guidelines:
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Make sure the device is reliably grounded.
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Make sure the AC power outlet is reliably grounded.
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Install a surge protected power strip at the power input end.

Installation accessories

Figure 1 Installation accessories for the WX1804H-PWR access controller
Figure 2 Installation accessories for the WX1810H-PWR access controller
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