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- Allen Bradley
- 1756-IRT8I
- ControlLogix ControlNet Communication Module
- USA
- 14.5 × 11.2 × 5.6 cm
- 0.45kg
- Xiamen, China
- New & In Stock
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1756-IRT8I/A Detailed Product Overview
Product Introduction
The 1756-IRT8I/A is a high-performance multi-signal analog input module designed for temperature and low-level analog signal measurement in industrial automation systems. It belongs to the ControlLogix platform and is used to acquire precise process data from RTD sensors, thermocouples, and millivolt signals.
This module provides 8 individually isolated input channels, allowing it to handle multiple signal types simultaneously while maintaining high measurement stability and electrical isolation. It is specifically designed for complex industrial environments where accurate temperature and process monitoring are required.
The 1756-IRT8I/A is widely used in industries such as petrochemical processing, oil and gas production, power generation, metallurgy, pharmaceutical manufacturing, food processing, and large-scale industrial automation systems.
Its ability to support multiple sensor types in a single module makes it a flexible and efficient solution for mixed-signal temperature monitoring applications.
Brand Information
| Item | Details |
|---|---|
| Brand | Allen Bradley |
| Product Category | Multi-signal Analog Input Module |
| Product Type | RTD / Thermocouple / mV Input Module |
| Platform | ControlLogix |
| Installation Method | Chassis Mounted |
| Main Function | Temperature and Analog Signal Acquisition |
| Application Field | Industrial Process Automation |
| Signal Types | RTD / Thermocouple / Millivolt |
Product Series Overview
ControlLogix Series
The 1756-IRT8I/A belongs to the ControlLogix modular automation system, designed for high-performance industrial control applications requiring flexibility and scalability.
This platform is widely used in process industries and discrete manufacturing systems where integrated control and high-speed data acquisition are required.
Key capabilities include:
- Process automation control
- Mixed analog and discrete I/O integration
- High-speed data acquisition
- Motion control systems
- Safety system integration
- Industrial communication networking
- Real-time diagnostics and monitoring
- Modular expansion capability
ControlLogix systems are widely adopted in large-scale industrial environments that require continuous operation and high reliability.
Product Features
1. 8-Channel Isolated Input Design
The module provides 8 individually isolated channels, allowing simultaneous measurement of multiple process variables.
2. Multi-Signal Compatibility
Supports multiple input types within a single module:
- RTD (temperature sensors)
- Thermocouples
- Millivolt signals
- Resistance signals
This flexibility reduces system complexity and hardware cost.
3. High-Resolution Measurement
Provides 24-bit high-resolution data acquisition for precise measurement of temperature and low-level signals.
4. Advanced Signal Processing
Includes features such as:
- Cold junction compensation (for thermocouples)
- Digital filtering
- Signal scaling
- Engineering unit conversion
- Synchronized sampling
5. Built-in Diagnostics
Supports advanced diagnostics including:
- Open-wire detection
- Sensor fault detection
- Over-range and under-range alarms
- Channel status monitoring
6. High Electrical Isolation
Each channel is electrically isolated to improve system stability and reduce interference between signals.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-IRT8I/A |
| Product Type | RTD / Thermocouple / mV Input Module |
| Series | ControlLogix |
| Input Channels | 8 Isolated Channels |
| Supported Inputs | RTD / Thermocouple / Millivolt |
| RTD Types | Pt100, Pt1000, Ni120, Cu10 |
| Thermocouple Types | B, C, D, E, J, K, N, R, S, T |
| Millivolt Range | ±100 mV |
| Resistance Range | 1–4000 Ω |
| Resolution | 24-bit |
| Data Format | IEEE 32-bit floating point |
| Scan Time | ~1 ms |
| Cold Junction Compensation | Dual CJC sensors |
| CJC Accuracy | ±0.3°C |
| Backplane Current | 200 mA @ 5.1 V |
| 24V Current Draw | 150 mA |
| Power Dissipation | 4.6 W |
| Isolation Voltage | 250 V continuous |
| Wiring Method | 36-pin Removable Terminal Block |
| RTB Compatibility | 1756-TBCH / 1756-TBS6H |
| Diagnostics | Wire-off detection, alarms |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Vibration Resistance | Industrial standard |
| Shock Resistance | High durability design |
| Dimensions | 14.5 × 11.2 × 5.6 cm |
| Weight kg（ ） | 0.45 kg |
Product Applications
Industrial Temperature Monitoring
Used for precise temperature measurement in continuous production processes.
Oil and Gas Industry
Applied in refinery process monitoring, pipeline temperature control, and drilling systems.
Power Generation Systems
Used in turbine monitoring, boiler control systems, and heat exchange processes.
Chemical Processing Industry
Supports reaction temperature monitoring and process control in chemical plants.
Pharmaceutical Manufacturing
Ensures strict temperature control in sterile production environments.
Food and Beverage Industry
Used in pasteurization, fermentation, and refrigeration process monitoring.
Product Advantages
Multi-Signal Integration
Combines RTD, thermocouple, and mV inputs in a single module.
High Measurement Accuracy
Provides stable and precise readings for critical industrial processes.
Strong Electrical Isolation
Reduces interference and improves signal integrity in harsh environments.
Advanced Diagnostic Capability
Early fault detection improves maintenance efficiency and reduces downtime.
High System Flexibility
Supports multiple sensor types and industrial applications.
Reliable Industrial Operation
Designed for continuous use in demanding industrial environments.
Recommended Related Models (Same Series)
| Model | Product Type | Key Feature | Channels | Dimensions | Weight kg（ ） |
|---|---|---|---|---|---|
| 1756-IF8 | Analog Input Module | General analog signals | 8 | 14.5 × 11.2 × 5.6 cm | 0.42 kg |
| 1756-IF8H | HART Input Module | Smart field communication | 8 | 14.5 × 11.2 × 5.6 cm | 0.46 kg |
| 1756-IF8I | Isolated Analog Input | Enhanced isolation | 8 | 14.5 × 11.2 × 5.6 cm | 0.46 kg |
| 1756-IF16 | High-density Analog Input | Large-scale signal input | 16 | 14.5 × 11.2 × 5.6 cm | 0.48 kg |
| 1756-IR6I | RTD Input Module | Dedicated temperature sensing | 6 | 14.5 × 11.2 × 5.6 cm | 0.28 kg |
Popular Models from Same Brand
| Model | Product Type | Function | Communication | Dimensions | Weight kg（ ） |
|---|---|---|---|---|---|
| 1756-L81E | PLC Controller | Main system control | EtherNet/IP | 15.2 × 14.0 × 5.5 cm | 0.62 kg |
| 1756-EN2TR | Ethernet Module | Industrial networking | EtherNet/IP | 14.5 × 11.2 × 5.6 cm | 0.50 kg |
| 1734-AENTR | Remote I/O Adapter | Distributed I/O system | EtherNet/IP | 13.2 × 7.5 × 5.0 cm | 0.30 kg |
| 2711P-T10C4D8 | HMI Panel | Operator interface | Ethernet/USB | 27.1 × 21.1 × 6.0 cm | 1.80 kg |
| 25B-D017N104 | VFD Drive | Motor speed control | EtherNet/IP | 35.0 × 21.6 × 18.0 cm | 4.90 kg |
Installation Notes
The module should be installed in a properly grounded industrial control cabinet with stable ventilation.
Shielded signal wiring is recommended to reduce electromagnetic interference and maintain measurement accuracy.
Regular inspection of terminal connections helps ensure long-term reliability and stable operation.
Summary
The 1756-IRT8I/A is a high-precision multi-signal analog input module designed for industrial automation systems requiring accurate temperature and process signal measurement.
Its ability to handle RTD, thermocouple, and millivolt signals in one module, combined with high resolution, strong isolation, and advanced diagnostics, makes it highly suitable for complex industrial environments.
It is widely used in energy, chemical, manufacturing, and process industries where measurement accuracy and system reliability are critical for safe and efficient operation.