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The Allen-Bradley 1771-IR is a robust PLC-5 RTD input module designed for versatile temperature measurement applications, supporting both Celsius and Fahrenheit readings with natural binary BDC format. It features six three-wire RTD inputs and operates without external power supply, thanks to a backplane current rating of 800 mA. Its impressive resolution and update speed (50 ms for 6 channels with 16 bits + sign) enable precise measurement across a wide range of temperatures and resistances, suitable for platinum and copper sensors. The module ensures reliable system operation with a lifespan of up to 100 million operations and provides smart troubleshooting aids via intuitive indicators on its front panel. Furthermore, its compatible with PLC2, PLC3, and PLC5 controllers and can be mounted on various 1771 I/O chassis, utilizing the 1771-WF swing arm for efficient signal termination.