The Allen-Bradley 1746-NI4 is a four-channel analog input module for the SLC 500 family that converts analog sensor signals into digital values for ladder logic and data processing. Each channel is differential and can be configured for either voltage or current input, with 16-bit resolution per channel to provide precise measurement across all four inputs. The module mounts in a 1746 backplane and shares a common reference across channels (not individually isolated), delivering a compact, multi-channel solution for analog data acquisition in industrial automation.
