In a PLC control system, although the wiring work occupies a small proportion, it is the foundation of programming design. Only with correct wiring can programming proceed smoothly. To ensure the correctness of the wiring, a clear understanding of the input and output circuits inside the PLC is essential. DC Input Circuit As shown in … Read more
Overview The digital input interface of a PLC is not complex. As we know, to enhance anti-interference capabilities, PLCs use optical isolators to isolate the input signals from the internal processing circuits. Therefore, the signal at the input end merely drives the internal LED of the optical isolator, which is then received by the phototransistor … Read more
Today, we bring you the wiring methods for sensors and PLCs, featuring twenty wiring diagrams. Isn’t that a wealth of information? Let’s take a look together! Overview The digital input interface of a PLC is not complex. To enhance anti-interference capability, PLCs use opto-isolators to isolate the input signals from the internal processing circuits. Therefore, … Read more