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Product Overview

The 1769-IF4 is a high-performance analog input expansion module for the Allen-Bradley CompactLogix and MicroLogix 1500 families. It provides four high-resolution channels capable of interfacing with a wide variety of industrial sensors, including pressure transducers, flow meters, and level transmitters.

With its 16-bit architecture, the 1769-IF4 delivers the precision required for complex process control and data acquisition, enabling granular monitoring of critical system variables.


Technical Specifications

Specification Details
Module Identifier 1769-IF4
Analog Input Channels 4 Points
Input Voltage Range ±10V DC, 0–10V DC, 0–5V DC, 1–5V DC
Input Current Range 0–20 mA, 4–20 mA
Resolution 16-Bit (unipolar); 15-Bit + sign (bipolar)
A/D Converter Type Delta-Sigma
Input Configuration Software-configurable Single-Ended or Differential
Full Scale Ranges ±10.5V, 0–10.5V, 0–5.25V, 0.5–5.25V, 0–21 mA, 3.2–21 mA
Backplane Current Draw 105 mA @ 5.1V DC; 40 mA @ 24V DC
Input Impedance 1 MΩ (Voltage) / 249 Ω (Current)
Channel-to-Bus Isolation 500V AC or 710V DC for 1 min
Power Dissipation 2.03 W
Power Supply Distance Rating 8 Slots max from system power supply
Dimensions 118 x 35 x 87 mm 
Unit Weight 0.29 kg 

Installation and Wiring Logic

  • Removable Terminal Block (RTB): Simplifies field maintenance and module replacement.

  • Differential Mode: Recommended for high-noise environments or long cable runs; uses two leads per sensor to reject common-mode noise.

  • Single-Ended Mode: Higher density when sensors share a common return path; ideal for short-distance, local signals.

  • Data Storage: Converted analog signals are stored as 16-bit signed integers in the controller’s I/O image. Use SCL (Scale) or CPT (Compute) instructions in Studio 5000 to convert raw counts to engineering units.


Common Technical Questions

  • Can I mix current and voltage inputs on the same module?
    Yes. Each channel is individually configurable. For example, a 4–20 mA pressure transmitter can be connected to Channel 0 and a 0–10V position sensor to Channel 1 without interference.

  • What is the "Power Supply Distance Rating"?
    The 1769-IF4 has a rating of 8, meaning it cannot be more than eight slots away from the system power supply (e.g., 1769-PA4). Exceeding this distance may compromise signal accuracy due to backplane voltage drop.

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