Allen-Bradley 1769-IF4 4-Channel Analog Input Module

Allen-Bradley 1769-IF4 is a Compact I/O 4‑channel analog input module designed for use in 1769 I/O racks within CompactLogix systems. It provides four differential or single‑ended analog inputs for voltage or current signals, with selectable ranges including ±10 V, 0–10 V, 0–5 V, 1–5 V, 0–20 mA, and 4–20 mA, all captured by a Delta‑Sigma ADC at 14‑bit resolution (unipolar) or 14‑bit with sign (bipolar). Per channel input impedance is 220 kΩ for voltage or 250 Ω for current, and the module offers isolation of 500 V AC or 710 V DC for 1 minute (group to bus 30 V AC/30 V DC working voltage). It supports four differential or four single‑ended inputs, and provides durable common‑mode and normal‑mode rejection figures (CMR > 60 dB at 50/60 Hz with the appropriate filter, NMDR around −50 dB under filter conditions). Physical specifications place the module at roughly 118 mm high, 35 mm wide, and 87 mm deep, weighing about 300 g (0.65 lb). Series B or later units are supported, and the device draws about 60 mA at 24 V (or 120 mA at 5.1 V), with a maximum heat dissipation of 2.52 W. This module is ideal for industrial sensor signal acquisition where four channels must be read into the controller over the 1769 I/O bus, enabling precise monitoring of analog signals in automation applications.