Sensor high level low level converter PLC signal PNP to NPN proximity photoelectric switch NPN to PNP

★ Support the number change of sensor signals output by various npn/pnp
★ Support PLC high-low level conversion
★ Support control board level conversion
◆ The input or output side can supply power
◆ If the input and output are connected reversely, there will be no signal output (just re connect correctly)