Allen-Bradley 1746-NI4 Analog Input Module

The Allen-Bradley 1746-NI4 Analog Input Module is a four-channel, chassis-mounted analog input card for SLC 500 PLC systems. It processes voltage or current signals from field devices with high-resolution inputs and supports selectable input types, enabling precise readings that feed into the controller for reliable process data. Common applications include monitoring sensors for temperature, pressure, flow, and level in process control, water treatment, manufacturing lines, and energy systems, typically installed in industrial automation panels and manufacturing equipment requiring analog signal monitoring. Within the SLC 500 series, the NI4 serves as an expansion, replacement, or retrofit option, with commonly referenced alternatives including the 1746-NI8, 1746-NI16I, and 1746-NIO4V.