Overview
The Allen-Bradley 1769-IR6 is a 6-channel RTD/resistance input module designed for CompactLogix and MicroLogix 1500 automation systems. This Compact I/O module delivers high-resolution analog inputs for accurate temperature and resistance measurement from RTD sensors and other resistance-based devices. The module integrates directly into CompactLogix platforms, supporting multiple RTD types including Platinum 385, Platinum 3916, Nickel, and Nickel-Iron elements.
Key Features
- 6 Individually Configurable Input Channels: Supports up to six RTD inputs with a variety of selectable input ranges, enabling flexible sensor integration in multi-point temperature applications.
- Multiple Input Range Options: Includes options for 0 to 150 ohms, 0 to 500 ohms, 0 to 1000 ohms, and the broader range of 0 to 3000 ohms, accommodating diverse RTD and resistance sensor types.
- High-Precision Conversion: Utilizes a sigma-delta converter design ensuring high precision in data conversion.
- Compact Form Factor: Open-style enclosure type allows flexible DIN rail or panel mounting in space-constrained cabinets.
- Low Power Draw: Current draw of 100 mA at 5.1 volts and 35 mA at 24 volts with maximum heat dissipation specified at 1.5 watts.
- Supported RTD Types: Platinum 385 or Platinum 3916 or 1200 Ohm Nickel 672 or 1200 Ohm Nickel 618 or 604 Ohm Nickel Iron 518.
Technical Specifications
The 1769-IR6 meets demanding industrial automation requirements with the following specifications:
- Input Signal Ranges: 0–150Ω, 0–500Ω, 0–1000Ω, 0–3000Ω (user-selectable per channel)
- Common Mode Voltage: -10 to 10 volts DC
- Maximum Cable Impedance: 25 ohms
- Isolation: 20 VDC 1 min, optical and magnetic isolation, channel to bus; 30 VAC/30 VDC working voltage (IEC Class 2 reinforced insulation)
- Display: Status LEDs for module and channel indication
- Operating Temperature: 0 to 60 degrees C
- Mounting: DIN Rail / Panel Mount
- Weight: 0.99 lbs
- Connector Type: Plug-in terminal connection
Typical Applications
The 1769-IR6 is suited for industrial processes requiring multi-point temperature monitoring and resistance measurement:
- Process control systems monitoring RTD temperature sensors on reactors, furnaces, or heat exchangers
- HVAC and thermal management systems in manufacturing equipment
- Food and beverage processing where precise temperature logging is critical
- Pharmaceutical and chemical production requiring compliance-grade temperature recording
- Water treatment and environmental monitoring systems
- OEM machine builders integrating CompactLogix-based automation solutions
Compatibility & Replacements
The 1769-IR6 is an analog input module designed for use in CompactLogix systems. The module integrates with CompactLogix 5370/5380 controllers and MicroLogix 1500 series PLCs via the Compact I/O connector interface. Direct 1769 platform connection to PowerFlex drives and other devices through Compact I/O to DPI/SCANport and Compact I/O to DSI/Modbus modules enables broader system integration. Configuration and programming use Studio 5000 Logix Designer software (version 30 or later recommended). EDS and AOP (Add-On Profile) files are available from Rockwell Automation for device configuration support.
