Allen-Bradley 1769-IF8 8-Point Analog Input Module

The Allen-Bradley 1769-IF8 is a CompactLogix 8-channel analog input module that mounts to a 1769 Compact I/O backplane and provides eight isolated inputs for sensing from field devices. It supports eight differential or eight single-ended inputs and can be configured to measure either voltage or current signals from connected sensors. Normal operating ranges include voltage options of -10 to +10 V, 0 to 10 V, 0 to 5 V, and 1 to 5 V, as well as current ranges of 0 to 20 mA and 4 to 20 mA; full-scale ranges extend to -10.5 to +10.5 V, 0 to 10.5 V, 0 to 5.25 V, 0.5 to 5.25 V, and 0 to 21 mA or 3.2 to 21 mA, respectively. The module delivers 16-bit resolution with an overall accuracy of about ±0.2% full scale for voltage measurements and ±0.35% full scale for current measurements at 25°C. Input impedance is typically 220 kΩ for voltage terminals and 250 Ω for current terminals. Power and backplane details include a maximum backplane bus current draw of 120 mA at 5 V and 70 mA at 24 V, with a total heat dissipation around 3.24 watts when all points are energized. The 1769-IF8 is powered from the Compact I/O backplane and does not supply loop excitation power to field devices, making it suitable for integrating with diverse 0–10 V or 4–20 mA sensor networks. Typical applications include industrial process and machine control where precise multi-channel analog inputs from sensors are required for accurate PLC-based monitoring and control.