What does a Programmable Logic Controller (PLC) primarily control in industrial processes?

A Programmable Logic Controller (PLC) primarily controls input and output devices in industrial processes, making it essential for automation systems in manufacturing and production environments. The PLC acts as the brain of the control system, receiving signals from various input devices such as sensors and switches, processing this information based on pre-programmed logic, and then sending commands to output devices like motors, valves, or alarms.

This capability enables real-time monitoring and management of industrial operations, allowing for precise control over machinery and processes. Hence, the distinction of PLCs lies in their ability to interface with and regulate the physical components of industrial settings, making them critical for maintaining efficiency, safety, and reliability in operations.

Other options pertain to different areas of technology. Network traffic management deals primarily with data transmission over networks, while electrical grids focus on the distribution and management of electrical power. Data storage refers to the collection and preservation of digital information, but these aspects do not encapsulate the main functions of a PLC in the context of industrial process control.