Programmable logic controllers (PLC) A Programmable Logic Controller (PLC) is a specialized hadware designed to manage control tasks in industrial settings. A PLC is a special kind of digital computer that plays a crucial role in industrial automation. It has a CPU that runs the control program and manages other components.Ever peeked inside a control cabinet on a factory floor?If so, you've likely seen PLCs at work. Often called the brains of a production line, PLCs are vital for industrial automation. Engineers design, program, and set up PLC systems to fit the needs of specific automation tasks. PLCs control and monitor machinery and processes, boosting productivity, reliability, and safety.If you haven't looked inside a control cabinet yet, keep reading to learn about the amazing technology powering today's industries.