Allen-Bradley 1771-IR RTD Input Module The Allen-Bradley 1771-IR is a six-channel Resistance Temperature Detector (RTD) input module designed for seamless integration with PLC-5 and 1771 Series I/O systems. This module enables precise temperature measurements by converting analog signals from RTDs into digital data for processing within the PLC framework. Key Features Six RTD Input Channels: Accommodates up to six three-wire RTD inputs, allowing simultaneous monitoring of multiple temperature points. Wide Sensor Compatibility: Supports 100-ohm platinum and 10-ohm copper RTDs, as well as other sensors reporting in ohms. High Resolution and Accuracy: Offers a resolution of 0.1°C (0.1°F) for platinum sensors and 0.3°C (0.5°F) for copper sensors, ensuring precise temperature readings. Rapid Channel Update: Achieves a channel update time of 50 milliseconds for all six channels, facilitating timely data acquisition. Integrated Sensor Excitation: Provides a constant 1mA current for sensor excitation, eliminating the need for external power supplies. Robust Input Isolation: Features 1000V peak isolation between channels and between each channel and the backplane, enhancing system safety and reliability. Comprehensive Fault Detection: Includes open RTD detection with a response time of less than 0.5 seconds, aiding in prompt identification of sensor issues. Technical Specifications Temperature Measurement Range: Platinum RTDs: -200 to +870°C (-328 to 1598°F) Copper RTDs: -200 to +260°C (-328 to +500°F) Resistance Measurement Range: 1.00 to 600.00 ohms Data Formats: Natural binary, BCD actual temperature, or ohm readings Backplane Current Consumption: 800 mA at 5V DC Power Dissipation: 4.75 W maximum Thermal Dissipation: 16.2 BTU/hr Signal Delays: DC On-State: 10 ms DC Off-State: 50 ms AC On-State: 45 ms ± 15 ms Environmental Conditions: Operating Temperature: 0 to 60°C (32 to 140°F) Storage Temperature: -40 to 85°C (-40 to 185°F) Relative Humidity: 5 to 95% non-condensing Installation and Compatibility The 1771-IR module is compatible with various Allen-Bradley I/O chassis, including models 1771-A1B, 1771-A2B, 1771-A3B, and 1771-A4B. It utilizes the 1771-WF wiring arm for field connections and is keyed between positions 10 and 12 or between 28 and 30 to ensure correct installation. Applications Ideal for industrial process control, the 1771-IR module is used in applications requiring accurate temperature monitoring and control, such as manufacturing processes, HVAC systems, and other environments where precise thermal management is critical. By integrating the Allen-Bradley 1771-IR RTD Input Module into your PLC system, you can achieve reliable and accurate temperature measurements essential for maintaining optimal process conditions.