ABB KX8974c V24 HIEE320606R1 trapezoidal logic control

ABB KX8974c V24 HIEE320606R1

Adopts high-performance industrial-grade processor

Adopt high-performance industrial-grade wireless module

4G full network communication (Unicom, Telecom, Mobile)

Support low power consumption mode

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Description

ABB KX8974c V24 HIEE320606R1 trapezoidal logic control

ABB KX8974c V24 HIEE320606R1 Common mode interference and differential mode interference are a more commonly used classification. Common mode interference is the signal to the ground potential difference, mainly by the power grid string into the ground potential difference and space electromagnetic radiation in the signal line induced by the common state (same direction) voltage iteration of the formation. Common mode voltage is sometimes larger, especially with poor isolation performance of the distributor power supply, the transmitter output signal common mode voltage is generally higher, some can be as high as 130V or more.

ABB KX8974c V24 HIEE320606R1 common mode voltage through the asymmetrical circuit can be converted to differential mode voltage, affecting the measurement and control signals, resulting in component damage (this is the main reason for the high damage rate of some system I / O module), this common mode interference can be DC, can also be AC. Differential mode interference refers to the role of the signal between the poles of the interference voltage, mainly by the electromagnetic field in the space between the signal coupling inductance and by the unbalanced circuit to convert the common mode interference formed, this interference is superimposed on the signal, directly affecting the measurement and control accuracy.
ABB KX8974c V24 HIEE320606R1 space radiation electromagnetic field (EMI) is mainly generated by the power network, electrical equipment, transient processes, lightning, radio broadcasting, television, radar, high-frequency induction heating equipment, etc., usually referred to as radiated interference, its distribution is extremely complex. If the PLC system is placed in its radio frequency field, it will be subject to radiation interference, the impact of which is mainly through two paths: one is directly to the PLC internal radiation, by the circuit inductance of the interference; the second is to the PLC communication network, the radiation, by the communication line inductance of the introduction of interference. Radiation interference with the field equipment layout and equipment generated by the size of the electromagnetic field, especially the frequency, generally through the setting of shielded cables and PLC local shielding and high-voltage discharge elements for protection

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