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15.5 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. 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 “rush-current restraining type”
.
If the power supply is “rush-current restraining type”, a voltage drop may be caused during the
acceleration of the 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.
15.6 Grounding
1. Be sure to carry out grounding in order to ensure the noise tolerance of the controller.
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.
15.7 Maintenace
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 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.
Caution
Warning
Warning