GP-4402WW/GP-4502WW Hardware Manual
53
The following shows a surge protection device connection:
Attach a surge protection device to prevent damage to this product as a result of a lightning-
induced power surge from a large electromagnetic field generated from a direct lightning strike.
We also strongly recommend to connect the crossover grounding wire of this product to a
position close to the ground terminal of the surge protection device.
It is expected that there will be an effect on this product due to fluctuations in grounding potential
when there is a large surge flow of electrical energy to the lightning rod ground at the time of a
lightning strike. Provide adequate distance between the lightning rod grounding point and the
surge protection device grounding point.
If the voltage variation is outside the prescribed range, connect a regulated power supply.
1 Regulated power supply
2 Twisted-pair cord
3 This product
Select a power supply low in noise for between the line and ground. If there is an excessive
amount of noise, connect an insulating transformer.
Use isolating transformers with capacities exceeding the maximum power consumption. Refer
to “Power consumption” in Specifications (see page 22).
1 Insulating transformer
2 Twisted-pair cord
3 This product
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