The difference between the wiring of PNP and NPN sensors lies in the difference in output signal and wiring method.
The output signal of the PNP sensor is a positive voltage, which requires a power source to activate the sensor. Therefore, the PNP sensor needs to connect its output terminal to the negative pole of the power supply, and the input terminal to the input terminal of the tooling equipment.
The output signal of the NPN sensor is a negative voltage, which requires a power source to activate the sensor. Therefore, the NPN sensor needs to connect its output terminal to the positive pole of the power supply, while the input terminal is connected to the input terminal of the tooling equipment.
In summary, the output end of the PNP sensor is connected to the negative pole of the power supply, the input end is connected to the input end of the tooling equipment, the output end of the NPN sensor is connected to the positive pole of the power supply, and the input end is connected to the input end of the tooling equipment.
