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E4809-045-109-C

E4809-045-109-C

E4809-045-109-C

E4809-045-109-C

E4809-045-109-C

E4809-045-010-B When the programmable logic controller is put into operation, its working process is generally divided into three stages, namely, input sampling, user program execution and output refreshing. The completion of the above three stages is called a scanning cycle. During the whole operation period, the CPU of the programmable logic controller repeatedly executes the above three stages at a certain scanning speed.
The function of diode:
E4809-045-010-B diode is one of the most commonly used electronic components. Its biggest characteristic is unidirectional conduction, that is, the current can only flow in one direction of the diode. The diode has the functions of rectifying circuit, detecting circuit, voltage stabilizing circuit and various modulation circuits, all of which are mainly composed of diodes. Its principle is very simple. It is because of the invention of diodes and other components that we are born in the colorful electronic information world. Since the function of diode is so great, how should we test this component? In fact, it’s very simple. Just hit the resistance level with a multimeter to measure the reverse resistance. If the reverse resistance is small, this diode is bad. If the reverse resistance is large, this diode is good. For such a basic component, we should firmly grasp its working principle and basic circuit, so as to lay a good foundation for future electronic technology study.