The Allen-Bradley 1746-NI4 is a high-performance analog input module for the SLC 500 series programmable logic controllers. It is designed to interface with a variety of analog sensors, converting continuous voltage or current signals into digital values that the PLC processor can interpret and use. Featuring four individually isolated input channels, this module provides flexibility and signal integrity for demanding industrial applications. Its user-configurable input ranges, including standard signals like 4-20mA and 0-10V, make it a versatile solution for monitoring process variables such as pressure, temperature, flow, and level.