Problem description of control signals:
Faulty and unpredictable operation of electromagnetic or opto-relays using 2-wire AC-proximity sensors/switches.
High leakage current using 2 - wired AC sensors. Even when the 2-wire AC proximity sensor is OFF, a small amount of current flow through the sensor circuit as leakage current. The leakage current can range from 0.5 ... 3.5mA, which if remain in the load (relay coil) is large enough to cause load resets. In this way, the control relay can capture misleading and unpredictable readings.
Solution: Delcon SLI230CRP relay works with leakage current from 2-wire proximity switches.