What is the function of an output device in an automation system?

In an automation system, an output device serves the essential function of executing actions based on control signals received from the system's controller or processor. This means that once the system analyzes input data and processes it—often through a controller—output devices respond by carrying out specific tasks that directly affect the physical world or user experience. For instance, common output devices include actuators, motors, and displays. Actuators may open a valve or move a mechanical part, while a display might provide feedback to a user.

This distinction is important as it clarifies that output devices bridge the gap between the automation system's internal processing and real-world applications. They don't merely control the system or process input signals; rather, they translate the processed information into actionable outcomes, such as moving machinery or displaying information to an operator. Input signals, processing, and storage devices, while also critical to an automation system, do not fulfill the specific role of executing actions based on the system's control signals.