REL561 1MRK002496-AC Powered Transmitters

REL561 1MRK002496-AC is the use of poor isolation performance of the electrical power supply room, the transmitter output signal common mode voltage is generally higher, some can be as high as 130V or more. Common mode voltage through the asymmetrical circuit can be converted to differential mode voltage, directly affecting the measurement and control signals, resulting in component damage (this is the reason why some system I / O module damage rate is high), this common mode interference can be DC, can also be AC. Differential mode interference refers to the signal between the poles of the interference voltage, mainly by the electromagnetic field in the space between the signal coupling inductance and unbalanced circuitry by the conversion of common mode interference in the formation of the voltage, which allows the direct superposition of the signal, directly affecting the measurement and control accuracy.

REL561 1MRK002496-AC space radiation electromagnetic field (EMI) is mainly generated by the power network, the transient process of electrical equipment, lightning, radio broadcasting, television, radar, high-frequency induction heating equipment, etc., usually referred to as radiated interference, the distribution is extremely complex. If the PLC system is placed in the radio frequency field, it is recycled to the radiation interference, its impact is mainly through two paths; one is directly to the PLC internal radiation, by the circuit inductance of the interference; but rather to the PLC communication within the network of radiation, by the inductance of the communication line introduced by the interference. Radiation interference with the field equipment layout and equipment generated by the size of the electromagnetic field, especially frequency-related, generally through the setting of shielded cables and PLC local shielding and high-voltage relief elements for protection.

REL561 1MRK002496-AC is mainly introduced through the power supply and signal lines, usually called conducted interference. This kind of interference is more serious in China’s industrial site. REL561 1MRK002496-AC practice has proved that, due to power supply interference caused by the introduction of PLC control system failure in many cases, PLC system of the normal power supply power supply from the power grid. Due to the wide coverage of the power grid, REL561 1MRK002496-AC will be subjected to all the space electromagnetic interference and the induction of voltages and circuits on the line. In particular, the changes within the grid, switching operation surge, large power equipment starting and stopping, AC and DC rotating devices caused by harmonics, grid short-circuit transient shock, etc., all through the transmission line to the power supply side.