Allen-Bradley 1769-IF4I Isolated Analog Input Module

Allen-Bradley 1769-IF4I is a four-channel isolated analog input module for CompactLogix/1769 I/O backplanes that converts sensor signals into digital values for a controller. Each of the four channels is an isolated differential input capable of handling voltage and current signals, with voltage ranges such as 0–10 V, 0–5 V, and ±10 V, and current ranges of 0–20 mA and 4–20 mA, delivering 14‑bit resolution per channel. The module draws up to 145 mA from a 5 V backplane or up to 125 mA from a 24 V backplane, with a total heat dissipation of about 3.0 W; it does not provide loop power for analog inputs, so sensors must be powered separately. It is compatible with CompactLogix controllers and can be used with MicroLogix 1500, making it a common choice for integrating mixed analog signals into a PLC system.