The Allen-Bradley / Rockwell Automation 1771-IR RTD Input Module houses 6 RTD inputs (three-wire). Voltage range of 1771IR is 100 platinum and 10 copper or other. Backplane current load is 800mA. External power is not required. Wiring arm is the 1771-WF. Resolution is 16 bits and channel update is 50ms to 8 channels. Data format for 1771-IR is natural binary or BCD actual temperature or Ohm readings.