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16.4 Electrical wiring
1. Do not apply any excessive force to cables by repeated bending, tensioning or placing a
heavy object on the cables.
It may cause an electric shock, fire, or breaking of wire.
2. Connect wires and cables correctly.
Incorrect wiring could break he gateway unit or its peripheral devices depending on the seriousness.
3. Do not connect wires while the power is supplied.
It can break the gateway unit or its peripheral devices could be damaged to cause a malfunction.
4. Do not carry this product by holding its cables.
It may cause an injury or damage to the product.
5. Do not connect power cable or high-voltage cable in the same wiring route as the unit.
Te wires to the gateway unit or its peripheral devices can be interrupted with noise or induced surge
voltage from power lines or high-voltage lines and malfunction could be caused.
Separate the wiring of the gateway unit and its peripheral device from that of power line and high
voltage line.
6. Verify the insulation of wiring.
Insulation failure (interference with other circuit, poor insulation between terminals and etc.) could
introduce excessive voltage or current to the gateway unit or its peripheral devices and damage
them.
16.5 Power supply
1. Use a power supply that has low noise between lines and between power and ground.
In cases where noise is high, an isolation transformer should be used.
2. To prevent surges from lightning, an appropriate measure should be taken. Ground the surge
absorber for lightning separately from the grounding of the
gateway unit
and its peripheral
devices.
16.6 Grounding
1. Be sure to carry out grounding in order to ensure the noise tolerance of the
gateway unit
.
It may cause an electric shock or fire.
2. Dedicated grounding should be used.
Grounding should be to a D-class ground (Ground resistance of 100
Ω
or less.)
3. Grounding should be performed near the unit as much as possible to shorten the grounding
distance.
4. In the unlikely event that malfunction is caused by the ground, it may be disconnected.
Warning
Caution
Warning
