What is the function of a feedback transmission circuit in a controller?

The function of a feedback transmission circuit in a controller is crucial for the overall performance and accuracy of the control system. It primarily serves to convert the sensor signal into a usable controller signal. This process involves translating the raw data from the sensor—such as temperature, pressure, or flow rate—into a format that the controller can understand and use to make decisions.

By converting these signals, the feedback transmission circuit ensures that the controller can assess the current state of the system and compare it to the desired setpoint. This feedback mechanism allows for adjustments to be made based on real-time conditions, enabling the controller to effectively maintain control of the process being monitored. Understanding this function is essential for anyone involved in instrumentation and control systems, as it plays a key role in achieving accurate and reliable operation.