Frequency converter is an electronic or electromechanical device which converts alternating current (AC) of one frequency to alternating current of another frequency. It is mainly composed of rectifier, filter, inverter, braking unit, driving unit, and detecting unit, etc.
PLC is an industrial digital computer which has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, robotic devices, or any activity that requires high reliability control and ease of programming and process fault diagnosis. It reads signals from different sensors and input devices in either digital or analog form. Output devices such as motors and solenoid valves complete the automated system.
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