Allen Bradley Point I/O 1734-IR2 | RTD Input Module

Product Description

The Allen Bradley Point I/O 1734-IR2 is a compact RTD and resistance input module engineered for precise temperature measurement and resistance monitoring. With two single-ended, non-isolated channels, it supports a wide range of RTD sensor types and resistance inputs, making it suitable for diverse industrial applications.

Technical Specifications

• Manufacturer Allen Bradley

• Category PLCs

• Product Line Point I/O 1734

• Part Number 1734-IR2

• Weight 0.06 lbs (0.03 kg)

• Keyswitch Position 6

• Power Dissipation 1.0 W @ 28.8 VDC

• Module Type RTD / Resistance Input Module

• Series POINT I/O

• Number of Inputs 2 single-ended, non-isolated channels

• Compatible RTD Sensors 100 Pt α = 0.00385; 200 Pt α = 0.00385; 100 Pt α = 0.003916; 200 Pt α = 0.003916; 10 Cu α = 0.00427; 100 Ni α = 0.00618; 120 Ni α = 0.00618; 120 Ni α = 0.00672

• Resistance Input Range 0–600 Ω

• Resolution 16-bit, 9.5 mΩ/count; 0.03 °C/count (Pt385 @ 25 °C) or 0.05 °F/count (Pt385 @ 77 °F)

• Absolute Accuracy ±0.1% full scale @ 25 °C

• Input Step Response (per channel) 60 ms @ 50 Hz notch; 33 ms @ 60 Hz notch (default); faster response at higher notch frequencies down to 4 ms @ 480 Hz

• Input Update Rate (per module) 40 ms @ 50 Hz notch; 33 ms @ 60 Hz notch (default); 20 ms @ 100 Hz notch; 4 ms @ 480 Hz notch

• Current Draw 220 mA @ 5 VDC

• Conversion Type Delta-Sigma

• Data Format Signed integer

• Isolation Voltage 50 V continuous

• Thermal Dissipation 3.3 BTU/hour

• Enclosure Type Open-style (no rating)

• Module Location Compatible with 1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS wiring base assemblies

• Operating Temperature -20 to 55 °C

Application Scenarios

• Temperature monitoring in process control systems

• Resistance measurement for specialized industrial sensors

• Integration into distributed Point I/O systems for scalable automation

FAQ

Q: What types of RTD sensors are supported?  A: The module supports platinum, copper, and nickel RTDs with multiple alpha coefficients, including Pt385, Pt3916, Cu427, Ni618, and Ni672.

Q: How accurate is the measurement?  A: It provides ±0.1% full-scale accuracy at 25 °C, ensuring reliable readings in critical applications.

Q: What is the typical update rate?  A: Default update rate is 33 ms at 60 Hz notch, with faster rates available depending on notch frequency settings.

Comparable Models

• 1734-IT2I: Thermocouple input module for temperature measurement using thermocouples.

• 1734-IR2E: Enhanced RTD input module with extended features and improved performance.