How to work PNP and NPN sensor?

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Accepted Answer

PNP and NPN sensors are types of proximity sensors used in industrial automation to detect the presence or absence of objects.

PNP sensors source positive voltage to the output, while NPN sensors sink current from the output.
PNP sensors are commonly used in sourcing applications, while NPN sensors are used in sinking applications.
When connecting PNP sensors, the load is connected between the sensor output and the negative power supply, while for NPN sensors, the load is connected between the sensor output and the positive power supply.
Make sure to check the sensor's datasheet for the correct wiring and voltage requirements.
Example: PNP sensor would output a positive voltage when activated, while an NPN sensor would output a ground signal when activated.

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