Allen-Bradley 1771-IR/D | 1771-IR Ser D RTD Input Module

Product Overview

The 1771-IR/D is a Resistance Temperature Detector (RTD) input module designed for the Allen-Bradley PLC5. It features 6 three-wire RTD input channels and supports both Platinum and Copper RTDs for accurate temperature measurement in Celsius or Fahrenheit.

Key Specifications

• Number of Inputs: 6 three-wire RTD inputs
• Voltage Range: 100 Ohms (Platinum), 10 Ohms (Other)
• Data Format: Natural Binary, BDC Actual Temperature, or Ohm Readings
• Resolution: 1.0°C or 1.0°F per bit
• Channel Update: 50 ms for 6 channels
• Backplane Current: 800 mA
• Power Dissipation: 4.75 W
• Thermal Dissipation: 16.2 BTU/hr

Environmental Conditions

• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Storage Temperature: -40°C to 85°C (-40°F to 185°F)
• Humidity: 5% to 95% non-condensing

Performance Details

• Input Delay:
  • DC: 10 ms (On), 50 ms (Off)
  • AC: 45 ms (+/- 15) (Off)
• Measurement Range:
  • Platinum RTD: -200°C to +870°C
  • Copper RTD: -200°C to +260°C
• Resistance Range: 1.00 to 600.00 Ohms
• Resolution:
  • Platinum: 0.1°C/0.1°F
  • Copper: 0.3°C/0.5°F

Installation & Compatibility

• Mounting: Rack Mountable
• Compatible Controllers: PLC2, PLC3, PLC5
• Chassis Compatibility: 1771-A1B, 1771-A2B, 1771-A3B, 1771-A4B
• Wiring Arm: 1771-WH

Additional Features

• External Power: Not required
• Open Wire Detection: Yes
• Life Expectancy: 100 million operations
• Status Indicators: Provides troubleshooting aids for input/output status