Allen-Bradley 1771-IR/B RTD Input Module

Manufacturer: Allen-Bradley
Product Type: RTD Input Module
Origin: USA

Module Specifications:

• Module Location: 1771 I/O Chassis

• Sensor Type:

• 100 ohm platinum (alpha = 0.00385)

• 10 ohm copper (alpha = 0.00385)

• Other sensor types may be used with appropriate settings

• Units of Measure:

• Temperature: °C or °F

• RTD Resistance: Ohms (with 10 milliohm or 30 milliohm resolution)

• Temperature Range:

• Platinum: -200 to +870°C (-328 to +1598°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 the module

• Common Mode Rejection: 120dB @ 60Hz up to 1000V peak

• Common Mode Impedance: Greater than 10 megohms

• Normal Mode Rejection: 100dB @ 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): Detects high

• Scan Time: 50ms for 8 channels

• Isolation Voltage: Meets or exceeds UL Standard 508 and CSA Standard C22.2 No. 142

• Backplane Current: 950mA at 5V

• Power Dissipation: 4.75W max

• Thermal Dissipation: 16.2 BTU/hr

Environmental Conditions:

• Operating Temperature: 0 to 60°C (32 to 140°F)

• Rate of Change: Rapid changes greater than 10°C/min may temporarily degrade performance during periods of change

• Storage Temperature: -40 to 85°C (-40 to 185°F)

• Relative Humidity: 5 to 95% non-condensing

• Temperature Coefficient: 4.50ppm/°C of full scale range

Additional Information:

• Keying: Between 10 and 12; between 28 and 30

• Field Wiring Arm Cat No.: 1771-WF

• Wiring Arm Screw Torque: 7-9 inch-pounds