Power Supply; Grounding; Maintenance - SMC Networks JXCEH Operation Manual

18.5 Power supply

Caution
(1) Use a power supply with low noise between lines and between power and ground.
In cases where noise is high, use an isolation transformer.
(2) The power supplies for the controller power and the I/O signal power should be separate, and
both Power supplies should not be of the "in-rush current limiting type".
If the power supply is of the "in-rush current limiting type", a voltage drop may occur during the
acceleration of the actuator.
(3) Take appropriate measures to prevent lightning surges. Ground the surge absorber for
lightning separately from the ground connection for the controller and its peripheral devices.

18.6 Grounding

Warning
(1) Ensure that the product is grounded to allow the noise tolerance of the controller.
Otherwise it may cause an electric shock or fire.
(2) A dedicated Ground connection must be used.
Grounding should be to a D-class ground connection. (Ground resistance 100Ω or less)
(3) The grounding point should be as near as possible to the controller to keep the cable length
short.
(4) In the unlikely event that malfunction is caused by the ground connection, it may be
disconnected.

18.7 Maintenance

Warning
(1) Perform maintenance checks periodically.
Confirm wiring and screws are not loose.
Loose screws or wires may cause unexpected malfunction.
(2) Conduct an appropriate functional inspection and test after completing maintenance.
In case of any abnormalities (if the actuator does not move, etc.), stop the operation of the system.
Otherwise, an unexpected malfunction may occur and it will become impossible to ensure safety.
Give an emergency stop instruction to confirm safety.
(3) Do not disassemble, modify or repair this controller or the peripheral devices.
(4) Do not put anything conductive or flammable inside of the controller.
Fire or explosion can result.
(5) Do not perform an insulation resistance test or insulation withstand voltage test.
(6) Ensure sufficient space for maintenance.
Design the system to allow the required space for maintenance.
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No. JXC※-OMY0008