2021年11月18日 · NPN and PNP in PLC. NPN stands for Negatively Switched. The term “switched” refers to which side of the controlled load (relay, tiny indicator, PLC input) is electrical. Keep in mind that if you get them jumbled up, “N” stands for “Negative” and “P” stands for “Positive”. The Negative side of PNP sensors links to the common ...

2022年10月15日 · PNP and NPN refer to the transistor types providing the output voltage. The main difference between these two transistors is the direction of current. In the PNP sensor configuration, the wire providing the output signal will supply …

德系多的是pnp接法，比如 西门子 的plc。而日本系列多用的是npn接法，比如 三菱 的plc. 我做电气工程自动化plc设计有十年时间的经验了，对于电气工程接线以及plc编程都有很深的研究，总结了套方法，直接套用这套方法就能够快速编写程序。

2021年11月12日 · There are several factors that can incline towards which type of output to use, but none of them is decisive, on the market there are sensors of both types as well as PLC cards. In Europe it is more common to use PNP (sinking) while in …

2024年4月25日 · However, when you start working with PLC’s and 24 VDC sensors you have to follow a slightly different wiring technique. Two very common, yet confusing terms in this space are “PNP” and “NPN”. This article aims explain these terms and provide real examples of how to wire PNP and NPN sensors to a PLC.

Electrically, a PNP type of proximity switch outputs the current from the sensor with (+) voltage. An NPN type of proximity switch receives the current to the sensor with (-) voltage. As shown in Fig. (1).

However, situations may arise where the output type of a sensor (NPN or PNP) does not match the PLC input requirements. This guide will explain how to convert an NPN sensor to behave like a PNP sensor, and vice versa, before integrating them into a PLC.