Input/Output modules are hardware components commonly used in automation, control systems, and industrial processes. These modules serve as interfaces between the physical world and a control system, allowing it to receive data from sensors, devices, and instruments (inputs) and send control signals to actuators, valves, and other output devices. I/O modules facilitate the exchange of digital or analogue information between the control system and the external environment.

I/O Modules are essential in building automation, where they play a crucial role in gathering data and executing control commands to ensure the proper functioning of systems and processes.