Which of the following best describes the function of a pneumatic system in automation?

A pneumatic system in automation is centered around the utilization of compressed air for its operation. This technology harnesses the energy from compressed air to perform a variety of tasks, such as moving actuators, controlling valves, and powering tools. The advantage of pneumatic systems lies in their ability to provide quick and smooth movements, making them ideal for applications requiring rapid actuation and precise control.

The reliance on compressed air allows for a simple and often safer operation, as air is non-flammable and can be easily supplied through compressors. Moreover, this type of system is typically easier to maintain compared to other systems that may rely on fluids like oils or other hydraulic fluids, which can create environmental and safety concerns.

By contrast, gravitational force, continuous electrical connection, and magnetic fields relate to other forms of automation systems. Gravitational force does not directly apply to pneumatic systems, while a continuous electrical connection is characteristic of electric or electronic systems, and magnetic fields are more aligned with electromagnetic systems. Thus, the function of a pneumatic system is best encapsulated by its operation utilizing compressed air.