Which component will NOT directly influence the operation of a pneumatic control system?

In a pneumatic control system, the main components that directly influence its operation include pneumatic actuators, pressure sensors, and pneumatic piping. The pneumatic actuator serves as the component that converts compressed air energy into mechanical motion, enabling control of mechanisms. The pressure sensor plays a critical role in monitoring the air pressure within the system, providing feedback that helps maintain the desired pressure levels for consistent performance.

Pneumatic piping is essential for transporting compressed air throughout the system, linking the various components and ensuring that the actuators receive the required air supply for operation. Therefore, it is directly involved in the system's functionality.

The electrical circuit, while it might interact with or control the pneumatic system, does not directly influence the operation of the pneumatic aspects. Instead, it serves as a control mechanism, allowing for remote operation or automation, but does not have a direct physical impact on how the pneumatic components operate. Thus, it is the correct choice for being the component that does not have a direct influence on the operational dynamics of a pneumatic control system.