Allen-Bradley 1746-NIO4V SLC 500 Analog Input Module

The Allen-Bradley 1746-NIO4V SLC 500 Analog Input Module provides multiple analog voltage and current input channels for precise process monitoring and control in SLC 500 PLC systems. This rack-mounted module plugs into the SLC backplane and is powered from the SLC 500 rack power bus, enabling analog signal acquisition for sensors across industrial environments such as manufacturing lines, water and wastewater facilities, HVAC, chemical processing, material handling, and packaging where level, pressure, temperature, and flow sensors feed the control system. It supports voltage and current inputs with model-dependent configuration and delivers high-accuracy analog-to-digital conversion, designed for operation in industrial-rated temperatures inside control enclosures. Common replacements include the 1746-NI8, and it remains compatible with Allen-Bradley SLC 500 I/O racks.