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

Overview

The Allen-Bradley 1769-IF4 is a high-precision analog input module designed for CompactLogix and MicroLogix 1500 controllers. It supports four channels capable of handling differential, single-ended, or mixed signal inputs. This module integrates a Delta-Sigma analog-to-digital converter, providing 14-bit or 14-bit plus sign resolution for accurate signal processing. Users can configure I/O memory mapping, PID scaling, or engineering unit conversion directly in the module.

The module requires an external 24 VDC power supply and uses Belden or equivalent wiring for connectivity. It features open-circuit detection, auto-calibration, and LED status indicators for easy monitoring. Installation supports both DIN rail and panel mounting.

Key Specifications

Feature	Specification
Manufacturer	Allen-Bradley (Rockwell Automation)
Product Line	CompactLogix
Part Number	1769-IF4
Module Type	4-Channel Analog Input Module
Input Type	Differential, Single-Ended, Mixed
No. of Inputs	4
Input Current Range	0–21 mA
Nominal Current Signals	0–20 mA, 4–20 mA
Input Voltage Range	0–10.5 VDC
Voltage Signal Normal Range	±10V DC, 0–10V DC, 0–5V DC, 1–5V DC
Voltage Signal Full Range	±10.5 VDC, -0.5–10.5 VDC, -0.5–5.25 VDC, 0.5–5.25 VDC
Converter Type	Delta-Sigma ADC
Resolution	14-bit, 14-bit plus sign
Backplane Current	1.4 A @ 24 VDC
Power Consumption	33.6 W
Power Dissipation	7.5 W
Communication	4-point wiring compatible with 22–14 AWG solid, 22–16 AWG stranded
Series	A and B
Compatible Controllers	MicroLogix 1500, 1769 CompactLogix
Operating Temperature	0–60°C
Storage Temperature	-40–85°C
Vibration	5 g (10–500 Hz) operating
Shock	30 g operating, 40 g non-operating
Altitude	2000 meters maximum
Humidity	5–95% non-condensing

Physical Dimensions and Weight

Dimensions: 87 × 35 × 118 mm
Weight: 0.44 lbs (0.20 kg)
Enclosure Type: Open-type
Mounting: DIN rail or panel mount

Power and Signal Details

The 1769-IF4 accepts both voltage and current inputs, including 0–20 mA, 4–20 mA, 0–10 VDC, ±10 VDC, 0–5 VDC, and 1–5 VDC. Series A and B modules draw a maximum of 5 VDC, while Series B modules require 24 VDC. The module ensures accurate common-mode rejection over 60 dB and normal-mode rejection of -50 dB at 50–60 Hz.

Operational Features

The module supports auto-calibration per channel, real-time sampling, input filters, and alarm configurations. Open-circuit detection immediately signals the controller, allowing HMI or SCADA systems to display non-fatal alerts. It also supports PID scaling, percent range, and raw data formats for flexible process control.