Blocking Cell Phone Scanners

Abdallah Galiz 2022-01-20

With the development of science and technology, PLC is more and more widely used in industrial control. The reliability of PLC control system directly affects the safe production and economic operation of industrial enterprises, and the anti-interference ability of the system is the key to the reliable operation of the entire system. The various types of PLCs used in the automation system, some are centrally installed in the control room, some are installed on the production site and various electrical equipment, and most of them are in the harsh electromagnetic environment formed by strong electric circuits and strong electric equipment. To improve the reliability of the PLC control system, the designer can effectively ensure the reliable operation of the system only by knowing all kinds of Blocking Cell Phone Scanners disturbances in advance. The types of interference are usually divided according to the causes of the interference, the interference patterns of the noise and the waveform properties of the noise. Among them: according to the different causes of noise, it is divided into discharge noise, surge noise, high-frequency oscillation noise, etc.; cell phone jammer According to the waveform and nature of the noise, it is divided into continuous noise, occasional noise, etc.; according to different sound interference modes, it is divided into Common mode interference and differential mode interference.

Common mode interference and cell phone jammers are a more commonly used classification method. Common mode interference is the potential difference between the signal and the ground, which is mainly formed by the grid in-line, the ground potential difference and the common state (same direction) voltage induced on the signal line by the space electromagnetic radiation. The common mode voltage is sometimes large, especially in the electrical power supply room with poor isolation performance, the common mode voltage of the output signal of the transmitter is generally high, and some can be as high as 130V or more. The common mode voltage can be converted into a differential mode voltage through an asymmetric circuit, which directly affects the measurement and control signal and causes damage to components (this is the reason for the high damage rate of some system I/O modules). This common mode interference can be DC, Can also be used for communication. Blocking Cell Phone Scanners refers to the interference voltage used between the two poles of the signal. It is mainly caused by the coupling induction of the space electromagnetic field between the signals and the voltage formed by the unbalanced circuit converting the common mode interference. This is directly superimposed on the signal and directly affects the measurement and control accuracy.