What best describes a programmable logic controller (PLC)?

What best describes a programmable logic controller (PLC)?

• A. PLCs are industrial computers that control machines and other industrial applications.
• B. PLCs are microcontrollers used in consumer electronics.
• C. PLCs are sensors that monitor machine speed.
• D. PLCs function only as power supplies for machines.

Answer: (A)

A PLC is an industrial computer designed to control machines and processes in manufacturing and other industrial settings. It combines a processor, memory, and input/output interfaces to connect with sensors and actuators, and it runs a program that continuously reads inputs, makes decisions, and updates outputs in real time. PLCs are built for rugged environments, offering modular I/O, robust communication options, and deterministic timing to keep automation tasks reliable and predictable. They’re programmable using ladder logic and other industrial languages, focused on controlling equipment rather than performing generic computing or sensing tasks. They are not microcontrollers used in consumer electronics, not sensors, and not power supplies.

A PLC is an industrial computer designed to control machines and processes in manufacturing and other industrial settings. It combines a processor, memory, and input/output interfaces to connect with sensors and actuators, and it runs a program that continuously reads inputs, makes decisions, and updates outputs in real time. PLCs are built for rugged environments, offering modular I/O, robust communication options, and deterministic timing to keep automation tasks reliable and predictable. They’re programmable using ladder logic and other industrial languages, focused on controlling equipment rather than performing generic computing or sensing tasks. They are not microcontrollers used in consumer electronics, not sensors, and not power supplies.