Circuit forms industrial-grade digital potentiometer

摘要

Roth ac and dc motors in modern industrial systems often receive their control from PLCs (programmable-logic controllers) in a control room safely away from the process. If an operator must manually set the motor speed while observing the process, the component of choice is usually an industrial-grade potentiometer. The wiper of this potentiometer produces a signal of 0 to 10V that feeds back to a motor controller in the control room.