Allen-Bradley 1746-NR4 RTD/Resistance Analog Input Module

Description

The 1746-NR4 is a four-channel analog input module designed for industrial automation applications. It features high-accuracy data acquisition and robust environmental protection, making it suitable for demanding industrial environments.

Electrical Specifications

• Backplane Current Consumption:
  • 50 mA at 5V DC
  • 50 mA at 24V DC
• Backplane Power Consumption: 1.5 W max (0.3 W at 5V DC, 1.2 W at 24V DC)
• External Power Supply Requirements: None
• Number of Channels: 4 (backplane isolated)
• I/O Chassis Location: Any I/O module slot except slot 0
• A/D Conversion Method: Sigma-delta modulation
• Input Filtering: Low-pass digital filter with programmable notch (filter) frequencies

Physical Specifications

• LED Indicators: 5 green status indicators (one for each of 4 channels and one for module status)
• Module ID Code: 3513
• Max Termination Wire Size: Two 2.5 mm² (14 AWG) wires per terminal
• Max Cable Impedance: 25 Ω max for three-wire RTD configuration
• Terminal Block: Removable (Allen-Bradley spare part Catalog Number 1746-RT25G)

Environmental Specifications

• Operating Temperature: 0 to 60 °C (32 to 140 °F)
• Storage Temperature: -40 to 85 °C (-40 to 185 °F)
• Relative Humidity: 5% to 95% (non-condensing)
• Hazardous Environment Classification: Class I, Division 2 Hazardous Environment
• Agency Certification:
  • UL and CSA Class I, Division 2 Groups A, B, C, D certified
  • CE compliant for all applicable directives