Electro-pneumatic control systems are build with electrical components to control pneumatic components (for example through electrically operated valves).
The working medium, compressed air, is controlled by electrical signals.
In contrast to purely pneumatic controls, electro-pneumatic controls allow significantly more complex functions, especially through the use of electronic circuits such as programmable logic controls. The advantage of pneumatics lies in the simple and cost-effective implementation of actuators, for example with pneumatic cylinders.