1769-IR6 Allen-Bradley Compact I/O Resistance Input Module

Product Overview

The ALLEN-BRADLEY 1769-IR6 is a high-precision RTD (Resistance Temperature Detector) input module belonging to the CompactLogix Compact I/O family. This module provides 6 individually isolated channels designed to interface with a wide range of resistance-based temperature sensors. With a high degree of accuracy and a nonlinearity rating of only ±0.05%, the 1769-IR6 is an essential component for temperature monitoring and control in industrial thermal processes. Engineered for efficiency, the unit weighs just 0.3 kg (0.66 lbs) and features a low-profile design for space-constrained DIN rail installations.

Technical Configuration

High-Accuracy Resistance Sensing

The 1769-IR6 module supports a broad input resistance range from 0 to 1000 Ω, making it compatible with various platinum, nickel, and copper RTD types. Each of the 6 inputs is processed with high resolution to ensure precise thermal feedback. The module operates with a low thermal footprint, consuming only 100 mA at 5.1V DC and 35 mA at 24V DC, with a maximum heat dissipation of just 1.5W, preventing heat buildup in tightly packed control cabinets.

Rugged Environmental Resilience

Designed for versatile deployment, this module features an extended operating temperature range from -20°C to +60°C (-4°F to +140°F). This allows for reliable performance in unconditioned environments or outdoor enclosures where temperature extremes are common. Its solid-state construction ensures long-term stability and resistance to the typical electrical noise found in industrial settings.

Technical Specifications

System Integration & Application

The 1769-IR6 is designed to be used with CompactLogix controllers or as distributed I/O in a 1769-based Ethernet adapter assembly. It provides the flexibility to mix and match with other Compact I/O modules, allowing users to customize their system for specific temperature sensing requirements. It is commonly used in HVAC control, plastic injection molding, and food processing applications where high-resolution temperature data is critical for product quality and safety.

Engineering Advantages

• 6-Channel Density: Provides six high-accuracy RTD inputs in a single module, maximizing rack space efficiency.
• Low Heat Dissipation: With only 1.5W of max heat loss, it helps maintain a cooler operational environment for adjacent modules.
• Precision Linearity: ±0.05% nonlinearity ensures that temperature readings remain consistent across the entire 1000 Ω range.
• Wide Compatibility: Works seamlessly with standard industrial RTDs and resistance sensors, reducing the need for signal converters.

Technical FAQs

Q1: What type of sensors can I use with the 1769-IR6?
A1: You can use any RTD or resistance sensor that operates within the 0 to 1000 Ohm range, including standard Pt100 and Pt1000 sensors.

Q2: Is each input individually configurable?
A2: Yes, each channel can be configured for specific sensor types and data formats through the controller's programming software.

Q3: Does this module require an external power supply?
A3: The module draws its primary power from the 1769 system backplane, though it does utilize both the 5.1V and 24V rails provided by the system power supply.