■Measures against back EMF
When connecting an inductive load, connect a diode in parallel with the load.
Use the diode that satisfies the following conditions:
• A reverse breakdown voltage is ten times as high as the circuit voltage or more.
• A forward current is twice as high as the load current or more.
■About element protection of the IO-Link module
If excessive noise affects the terminals of the IO-Link module, the output may be turned on to help the protection of the output
element. Adjust the voltage between terminals of the IO-Link module to fall within the operating load voltage range by taking
measures such as the following:
• To use an inductive load such as a relay, a surge suppressor is required on the load side as well. Take appropriate
measures, referring to the measures against back EMF as a guide.
• To prevent excessive noise, avoid installing power cables together with I/O cables.
5 INSTALLATION AND WIRING
5.1 Before Using the I/O Link Module