Introduction to the control feedback signal of electric valves
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The control signal for electric valves can be 0-10V, 2-10V, 0-20mA, or 4-20mA, while the feedback signal is either 0-10V or 2-10V. What is the difference between them? What are the functions of the control signal and the feedback signal?
Analog signals can be generated using voltage or current in milliampere units, which is essential for control valves. A control signal is sent to the valve to regulate its opening degree; the valve then sends a feedback signal, through which the actual opening degree of the valve can be determined.
Personally, I think it depends on the parameters of your electric actuator; the control valve positioner generally uses a 4–20mA signal
The control signal is used to control the valve’s operation, while the feedback signal is used to determine whether the valve has reached its intended position