What is a primary function of an Analog Input module?

The primary function of an Analog Input module is to measure variable electrical signals. This capability allows the module to accept a range of input signals, such as voltage or current, from various sensors and transducers. Analog signals can vary continuously, representing a spectrum of values, which is crucial for applications that require precise monitoring and control of physical variables like temperature, pressure, or flow.

Analog Input modules convert these continuous signals into digital values that a controller can process, enabling more sophisticated control strategies compared to discrete inputs that only recognize on/off states. The other choices do not align with the core purpose of an Analog Input module—providing discrete feedback pertains to digital inputs, transmitting information from sensors encompasses broader functionalities beyond the specific role of analog inputs, and controlling relay outputs refers to actuator control rather than input signal measurement.