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What is a PLC and How to Draw a Block Diagram of It

"A Programmable Logic Controller (PLC) is a ruggedized industrial digital computer engineered for manufacturing, processing plants, and other automated environments. It continuously monitors input signals from physical sensors, executes a user-defined control program stored in its memory, and updates output signals to actuate heavy machinery, valves, motors, and assembly lines. Introduction to Programmable Logic Controllers Industrial automation relies heavily on precise, reliable, and real-time control mechanisms. Before the advent of the Programmable Logic Controller, industrial control systems relied entirely on massive panels filled with e..."

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