Allen Bradley 1734-IR2 Point I/O Module
2026-04-30
Allen Bradley 1734-IR2 — Detailed Technical Overview (POINT I/O RTD Input Module)
1. Product Overview
The Allen Bradley 1734-IR2 is a 2-channel RTD (Resistance Temperature Detector) input module designed for accurate temperature measurement in distributed industrial automation systems. It is part of a modular I/O platform that enables signal acquisition close to field devices, reducing wiring complexity and improving measurement stability.
This module is specifically designed for resistance-based temperature sensors, such as Pt100 and similar RTD elements. It converts resistance signals into temperature values with high precision, making it suitable for applications where temperature control is critical to process quality.
The module connects to a distributed I/O system via a backplane and communicates with a controller through a network adapter. Its compact structure allows it to be installed in space-limited control panels or directly in field enclosures.
2. Brand and Series
- Brand: Allen Bradley
- Series: POINT I/O (1734 Series)
- Product Type: RTD / Resistance Analog Input Module
The POINT I/O series is designed for flexible and scalable automation architectures, supporting a wide range of digital and analog modules.
3. Technical Parameters
Parameter Table
| Parameter | Specification |
|---|---|
| Model | 1734-IR2 |
| Module Type | Analog Input (RTD / Resistance) |
| Number of Channels | 2 |
| Input Type | RTD / Resistance |
| Supported Sensors | Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120 |
| Resistance Range | Approx. 0–600 Ω |
| Temperature Range | Sensor dependent (e.g., Pt100: -200°C to +850°C) |
| Resolution | 16-bit |
| Measurement Resolution | Approx. 0.1°C |
| Accuracy | ±0.1% full scale (typical) |
| Conversion Time | Approx. 50–400 ms per channel |
| Excitation Current | Approx. 0.2–0.3 mA |
| Input Configuration | 2-wire / 3-wire supported |
| Backplane Current | Approx. 75 mA @ 5V DC |
| Power Dissipation | Approx. 1 W |
| Isolation | Channel-to-backplane isolation |
| Diagnostics | Open-circuit detection |
| Indicators | Module status LED |
| Mounting | DIN Rail (via terminal base) |
| Enclosure | Open-style |
| Operating Temperature | -20°C to +55°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5–95% non-condensing |
| Dimensions | Approx. 56 × 12 × 75.5 mm |
| Weight (kg) | Approx. 0.04 kg |
4. Product Features
The 1734-IR2 provides two independent RTD input channels, enabling precise temperature measurement from resistance-based sensors.
It supports multiple RTD types, allowing flexibility across different industrial processes.
The module includes built-in excitation current and signal conditioning, ensuring stable and reliable measurement results.
It supports common wiring configurations such as 2-wire and 3-wire connections, improving measurement accuracy by compensating for lead resistance.
Its compact design allows easy integration into distributed I/O systems with limited installation space.
5. Typical Applications
The 1734-IR2 is widely used in applications requiring accurate temperature monitoring:
- Industrial furnaces and thermal processing systems
- Chemical production and process control
- Food and beverage temperature regulation
- Energy and power generation systems
- HVAC and environmental control systems
- Manufacturing processes requiring thermal stability
It is especially suitable for environments where precise temperature feedback is essential for process quality and safety.
6. Product Advantages
High Precision Measurement
Provides accurate temperature readings using RTD sensors.
Wide Sensor Compatibility
Supports multiple RTD types and resistance ranges.
Stable Signal Processing
Integrated excitation and filtering ensure reliable performance.
Flexible Wiring Options
Supports multiple wiring configurations for improved accuracy.
Compact Design
Ideal for distributed control systems with limited panel space.
Reliable Diagnostics
Detects sensor faults such as open circuits, improving system reliability.
7. Recommended Models (Same Series or Related)
POINT I/O Series Related Models
| Model | Type | Channels | Signal Type | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1734-IR2 | Analog Input | 2 | RTD/Resistance | 56×12×75.5 | 0.04 |
| 1734-IK | Analog Input | 2 | Thermocouple/mV | 56×12×75.5 | 0.05 |
| 1734-IE2C | Analog Input | 2 | Current | 56×12×75.5 | 0.05 |
| 1734-IE2V | Analog Input | 2 | Voltage | 56×12×75.5 | 0.05 |
| 1734-IE8C | Analog Input | 8 | Current | 75.5×12×56 | 0.05 |
| 1734-AENT | Adapter | N/A | — | 133×56×79.8 | 0.30 |
8. Recommended Popular Models (Same Brand)
Popular Models
| Model | Type | Key Function | Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1769-L33ER | PLC Controller | Compact controller | 24V DC | 118×87×87 | 0.50 |
| 1756-L81E | PLC Controller | High-performance controller | 24V DC | 175×90×140 | 0.65 |
| 1756-EN2T | Communication | Ethernet module | 24V DC | 145×35×140 | 0.30 |
| 1734-AENTR | Adapter | Ethernet I/O adapter | 24V DC | 56×12×75.5 | 0.04 |
| 5069-IF8 | Analog Input | 8-channel analog input | 24V DC | 138×42×95 | 0.30 |