##  [Programmable Logic Controller](/programmable-logic-controller) 

  ##  [Programmable Logic Controller](https://engineering.quantumdictionary.io/programmable-logic-controller-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A rugged, industrial digital control device that cyclically executes a user‑written program to read inputs (sensors, switches), evaluate logic, and update outputs (actuators, relays, drives) to perform automation tasks; PLCs are built for predictable execution, I/O determinism, environmental robustness, and integration with industrial networks and supervisory systems.