Allen-Bradley 1734-IR2 | POINT I/O RTD & Resistance Input Module

Overview

The 1734-IR2 from Allen-Bradley is a POINT I/O module designed for precise temperature monitoring. It features two single-ended, non-isolated RTD input channels compatible with a wide range of sensors.

Input Compatibility

Each channel of the 1734-IR2 accepts 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, and 120 Ni variants. It also supports direct wiring of 0–600 Ω resistance signals.

Electrical Specifications

The 1734-IR2 delivers 16-bit resolution, providing 9.5 mΩ per count accuracy or 0.03 °C per count for Pt385 at 25 °C. Absolute accuracy reaches 0.1% of full scale. Input step response ranges from 60 ms at 50 Hz to 6 ms at 480 Hz. Input update rates vary from 40 ms at 50 Hz to 4 ms at 480 Hz. It consumes 220 mA at 5V DC and dissipates 1 W at 28.8V DC.

Physical Specifications

The 1734-IR2 measures 56 × 12 × 75.5 mm (2.21 × 0.47 × 2.97 in.) and weighs 0.08 pounds (0.036 kg). Its open-style enclosure allows flexible mounting in any suitable application enclosure.

Mounting and Compatibility

This module requires a compatible wiring base assembly such as 1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS. It mounts easily on standard 35mm DIN rails, saving panel space while providing reliable operation.

Features

The 1734-IR2 uses Delta-Sigma conversion and signed integer data format. It provides up to 50 V isolation, low thermal dissipation (3.3 BTU/hour), and operates in temperatures ranging from -20°C to 55°C. This compact and efficient module is ideal for cost-effective, high-precision temperature measurement applications.