The Allen Bradley 1746-NI4 is an SLC 500 analog input module designed for enhanced monitoring and control applications, featuring four differential channels that support both voltage and current inputs. With a 16-bit resolution for precise data conversion, it integrates a removable terminal block for convenient connections and employs Delta-Sigma Modulation for efficient signal processing. This module, suitable for both fixed and modular SLC 500 controllers, includes user-selectable input ranges and built-in LED indicators for quick diagnostics, optimizing system reliability and performance.