1771-IR Allen-Bradley Resistance Temperature Detector Input Module

1771-IR Resistance Temperature Detector (RTD) Input Module

Specifications

• Module Capacity: Six RTD input channels
• Module Location: 1771 I/O Chassis
• Sensor Type:
  • 100 ohm platinum (alpha = 0.00385) or 10 ohm copper (alpha = 0.00386)
  • Other types may be used with report in ohms only
• Units of Measure:
  • Temperature in °C
  • Temperature in °F
  • RTD resistance in ohms (10 milliohms or 30 milliohms resolution)
• Temperature Range:
  • Platinum: -200 to +870°C (-328 to 1589°F)
  • Copper: -200 to +260°C (-328 to +500°F)
• Resistance Range: 1.00 to 600.00 ohms
• Resolution:
  • Platinum: 0.1°C (0.1°F)
  • Copper: 0.3°C (0.5°F)
• Sensor Excitation: 1mA constant current source supplied by module
• Input Isolation Dielectric Test: 1000V peak channel to channel, channel to backplane, for 1 second
• Common Mode Rejection: 120dB @ 60Hz up to 1000V peak
• Common Mode Impedance: Greater than 10 megohms
• Normal Mode Rejection: 60dB @ 60Hz
• Input Overvoltage Protection: 120V rms continuous
• Open RTD Response Time:
  • Open excitation (terminal A) to overrange: <0.5 sec
  • Open common (terminal C) to underrange: <0.5 sec
  • Open sense (terminal B): drift high
• Scan Time (all 6 channels): 50ms
• Environmental Conditions:
  • Operating Temperature: 0 to 60°C (32 to 140°F)
  • Rate of Change: Ambient changes greater than 1.0°C/minute may temporarily degrade performance during periods of change.
  • Storage Temperature: -40 to 85°C (-40 to 185°F)
  • Relative Humidity: 5 to 95% noncondensing
• Backplane Power Consumption: 4.25W maximum, 0.85A at 5V
• Keying:
  • Between 10 and 12
  • Between 28 and 30
• Field Wiring Arm: Cat. No. 1771-WF

Dimensions and Weight

• Product Dimensions: 30.48 x 20.32 x 10.16 cm (12 x 8 x 4 inches)
• Product Weight: 454 grams (1 pound)