How does the proximity sensor connect to our equipments?

Three-wire proximity sensor wiring.

For 3-wire NPN type proximity sensors, the brown wire is connected to one end of the load and also connected to the positive power supply; the black wire is the signal wire and is connected to the other end of the load, and the blue wire is connected to the negative power supply.

For 3-wire PNP type proximity switches, the brown wire is connected to the positive side of the power supply; the black wire is the signal wire and is connected to one end of the load; the blue wire is connected to the other end of the load and to the negative side of the power supply.

proximity sensor wiring

(1) There are two-wire and three-wire proximity sensors. Three-wire proximity sensor is divided into NPN type and PNP type, and their wiring is different.

(2) The wiring of the two-wire proximity switch is relatively simple, which can be connected to the power supply after the proximity switch is connected to the load in series.

3) Three-wire proximity switch wiring: the red (brown) wire is connected to the positive side of the power supply; the blue wire is connected to the 0V side of the power supply; the yellow (black) wire is the signal, which should be connected to the load. The other end of the load is connected in this way: for NPN type proximity switch, it should be connected to the positive side of the power supply; for PNP type proximity switch, it should be connected to the 0V side of the power supply.

4) The load of the proximity switch can be a signal lamp, relay coil or PLC digital input module of the programmable logic controller.

PLC digital input module can generally be divided into two categories: a common input for the negative power supply, the current flowing out of the input module.

At this point, must choose NPN-type proximity switch; the other type of public input for the positive power supply, current flow into the input module, at this time, must choose PNP-type proximity switch.

 

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