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61
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No.JXC
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-OMU0030-A
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 Grounding
Warning
(1) Be sure to ground to ensure noise immunity of the controller.
It may cause an electric shock or fire.
(2) Controller mount hole (mounting part for ground cable) is connected to SG (signal ground) in
the controller.
Do not ground the controller when the controller is used in positive grounding environment.
(3) Dedicated grounding should be used.
Grounding should be to a D-
class ground (Ground resistance of 100 Ω or less.)
(4) Grounding should be performed near the unit as much as possible to shorten the grounding
distance.
(5) In the unlikely event that malfunction is caused by the ground, it may be disconnected.
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.