Allen-Bradley 1769-IF4 Analog Input Module

The Allen-Bradley 1769-IF4 is a four-channel analog input module for Compact I/O that accepts both differential and single-ended signals and plugs into a CompactLogix backplane, compatible with MicroLogix 1500 and 1769 CompactLogix controllers. It supports voltage inputs in ranges such as 0–10 V, 0–5 V, 1–5 V, and ±10 V, and current inputs in ranges up to 21 mA (including 0–21 mA and 3.2–21 mA) with a Delta-Sigma ADC delivering 14-bit resolution (unipolar for voltage, 14-bit with sign for bipolar current configurations). Isolation between the input circuits and the backplane is 500 V AC / 710 V DC (1 minute qualification) with 30 V AC/DC working voltage, and input impedance is 220 kΩ for voltage and 250 Ω for current; typical power draw is 120 mA at 5.1 V or 60 mA at 24 V. Dimensions are 118 x 35 x 87 mm and weight around 300 g; autocalibration on channel enable and configuration changes helps maintain accuracy across channels in industrial environments.