Allen-Bradley 1734-IR2 RTD Input Module for POINT I/O Systems

Product Overview

When precise temperature measurement is critical in industrial processes, the Allen-Bradley 1734-IR2 delivers reliable performance as a Resistance Temperature Detector (RTD) input module within the POINT I/O family. This module provides two single-ended, non-isolated input channels, each capable of supporting a wide range of RTD sensors including 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, and 120 Ni α = 0.00672. Additionally, it accepts direct wiring of 0-600 Ω analog signals, offering flexibility for various resistance-based measurements.

Technical Specifications

The 1734-IR2 features 16-bit resolution with 9.5 mΩ/cnt and 0.03 °C/cnt (Pt385 @ 25 °C) or 0.05 °F/cnt (Pt385 @ 77 °F). Absolute accuracy is rated at 0.1% Full Scale @ 25 °C. Input step response per channel varies by notch filter setting: 60 ms at 50 Hz, 50 ms at 60 Hz, 30 ms at 100 Hz, 25 ms at 120 Hz, 15 ms at 200 Hz, 13 ms at 240 Hz, 10 ms at 300 Hz, 8 ms at 400 Hz, and 6 ms at 480 Hz. The input update rate per module is 40 ms at 50 Hz, 33 ms at 60 Hz (default), 20 ms at 100 Hz, 17 ms at 120 Hz, 10 ms at 200 Hz, 8 ms at 240 Hz, 7 ms at 300 Hz, 5 ms at 400 Hz, and 4 ms at 480 Hz. Power dissipation is 1.0 W @ 28.8V DC, with a current draw of 220 mA @5V dc. The module uses Delta Sigma conversion and outputs data in Signed Integer format. Isolation voltage is 50 Volts Continuous, and thermal dissipation is 3.3 BTU/hour. The module operates at -20 to 55 °C and weighs 0.08 pounds (0.036 kilograms). Dimensions are 56 x 12 x 75.5 mm (2.2 x 0.47 x 2.97 in.).

Industry Applications

The 1734-IR2 excels in temperature monitoring for process industries such as chemical processing, food and beverage, and pharmaceutical manufacturing. For example, in a plastic extrusion line, the module can accurately track barrel temperatures using Pt100 RTDs, ensuring consistent product quality. Its 16-bit resolution and fast step response (as low as 6 ms at 480 Hz) enable precise control in high-speed thermal cycles. The ability to accept 0-600 Ω resistance inputs also makes it suitable for potentiometer-based position feedback in packaging machinery.

Installation & Setup Guidance

Mount the 1734-IR2 on a 1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS wiring base assembly. The keyswitch position is 6, ensuring proper alignment in the POINT I/O rack. Use shielded twisted-pair cables for RTD connections to minimize electrical noise. The module is open-style (no enclosure rating), so install it in a clean, dry cabinet. Configure the notch filter frequency via software to match your local power line frequency (default 60 Hz) for optimal noise rejection.

Maintenance & Reliability

Routine inspection of the 1734-IR2 should focus on checking for loose connections or corrosion on the wiring base terminals. The module's low power dissipation (1.0 W @ 28.8V DC) reduces heat buildup, extending component life. Operating within the -20 to 55 °C temperature range ensures reliable performance. No internal user-serviceable parts exist; if issues arise, replace the module to maintain system uptime.

Selection Guide & Purchasing Advice

Before ordering the 1734-IR2, verify that your POINT I/O system has an available slot and that the wiring base assembly (1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS) is compatible. Confirm that your RTD sensors match the supported types listed in the specifications. For resistance inputs, ensure the signal range is within 0-600 Ω. BluePLC Industrial stocks the 1734-IR2 and can assist with availability and lifecycle status. Contact us for current pricing and lead times.

For complete technical specifications for the 1734-IR2, please contact BluePLC Industrial.