NPN Output
NPN output refers to the negative polarity switching configuration of the sensor's output signal. In an NPN output sensor, the negative (-) terminal of the sensor is connected to the negative terminal of the power supply, while the output signal (usually 0V) is connected to the positive terminal of the power supply through a load resistor.
NPN outputs are commonly used in industrial automation applications, where they are often used in conjunction with devices such as PLCs (programmable logic controllers). When the sensor detects a target object, the output signal will go low, indicating that a trigger event has occurred.
PNP Output
PNP output refers to the positive polarity switching configuration of the sensor output signal. In a PNP output sensor, the positive (+) terminal of the sensor is connected to the positive terminal of the power supply, while the output signal (usually the supply voltage) is connected to the negative terminal of the power supply through a load resistor.
PNP outputs are also widely used in industrial automation, especially with devices such as PLCs. When the sensor detects a target object, the output signal will go high, indicating that a trigger event has occurred.