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(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.
The wires to the controller 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 controller 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 controller or its peripheral devices and damage them.
14.5 Power supply
Warning
(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) The power supplys should be separated between the controller power and the I/O signal power
and both of them do not use the power supply of “inrush current restraining type”.
If the power supply is “inrush current restraining type”, a voltage drop may be caused during the
acceleration of the electric actuator.
(3) To prevent surges from lightning, an appropriate measure should be taken. Ground the surge
absorber for lightning separately from the grounding of the controller and its peripheral
devices.
14.6 Ground
Warning
(1) Be sure to ground to ensure noise immunity of the controller.
It may cause electric shock or fire.
(2) Grounding should be dedicated ground.
Ground construction is Class D grounding. (Ground resistance 100 Ω or less)
(3) Grounding should be performed near the unit as much as possible to shorten the grounding
distance.
(4) Make the grounding as close as possible to the controller or peripheral equipment and
shorten the distance to ground.
14.7 Maintenance and inspection
Warning
(1) Perform a maintenance check periodically.
Confirm wiring and screws are not loose.
Loose screws or wires may cause unintentional malfunction.
(2) Conduct an appropriate functional inspection after completing the maintenance.
In case of any abnormities (in the case that the electric actuator does no move, etc.), stop the
operation of the system. Otherwise, an unexpected malfunction may occur and it will become
impossible to secure the safety.
(3) Do not disassemble, modify or repair this controller and the peripheral equipment.
(4) Do not put anything conductive or flammable inside of this controller.
It may cause a fire and explosion.
(5) Do not conduct an insulation resistance test and withstand voltage test on this product.
(6) Ensure sufficient space for maintenance activities. Provide space required for maintenance.
Design the system that allows required space for maintenance.
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