A Programmable Logic Controller (PLC) is a ruggedized industrial computer designed to automate manufacturing processes, such as assembly lines, robotic devices, or any activity that requires high-reliability control and ease of programming and process fault diagnosis.

Siemens (SIMATIC Series) as Known for the S7-1200 (compact) and S7-1500 (advanced) ranges. The North American leader. Famous for CompactLogix and ControlLogix systems. Mitsubishi Electric (MELSEC) is popular in Asia and the automotive industry. The FX and Q series are industry staples. Schneider Electric Modicon the first PLC of Their M221, M241, and M251 series are highly versatile.