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- Yokogawa
- AAR181-H00/K4A00
- RTD Input Module
- Japan
- 107.5 × 130 × 32.8 mm
- 0.2 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Yokogawa AAR181-H00/K4A00 is an RTD Input Module used in Yokogawa CENTUM / FIO distributed control systems. It is designed for high-precision temperature measurement by receiving resistance signals from RTD sensors such as Pt100.
This module is optimized for stable multi-channel temperature acquisition, strong electrical isolation, and reliable operation in industrial environments such as power plants and process industries.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Yokogawa |
| Model | AAR181-H00/K4A00 |
| Product Type | RTD Input Module |
| System Compatibility | Yokogawa CENTUM / FIO systems |
| Function | Temperature signal acquisition (RTD input) |
| Input Type | RTD sensors (e.g., Pt100, Pt1000 depending configuration) |
| Channel Configuration | Multi-channel isolated RTD inputs |
| Measurement Method | Resistance-to-temperature conversion |
| Signal Isolation | Channel-to-channel and system isolation |
| Accuracy | High-precision industrial temperature measurement |
| Burn-out Detection | Supported (sensor open-circuit detection) |
| Line Compensation | Supported for long-distance RTD wiring |
| Data Processing | Digital conversion via DCS backplane |
| Mounting Type | Rack-mounted module |
| Operating Environment | Industrial control cabinet |
| Humidity Range | 5%–95% non-condensing |
| Dimensions | 107.5 × 130 × 32.8 mm |
| Weight | 0.2 kg |
Function and Working Principle
The AAR181-H00/K4A00 operates as a temperature acquisition interface module.
Its core functions include:
- Receiving resistance signals from RTD temperature sensors
- Converting resistance values into temperature data
- Providing stable excitation current for RTD measurement
- Detecting sensor faults such as open circuit (burn-out)
- Ensuring accurate measurement through signal isolation and compensation
It functions as a front-end temperature measurement module for DCS systems.
Role in Industrial Control Systems
Within Yokogawa control architectures, the AAR181-H00/K4A00 provides:
- Accurate multi-point temperature monitoring
- Integration of RTD sensors into centralized control systems
- Stable signal conversion for process control loops
- High noise immunity in industrial environments
- Reliable operation in safety-critical applications
Industrial Applications
The Yokogawa AAR181-H00/K4A00 is widely used in:
- Power generation plants (turbine and boiler temperature monitoring)
- Oil and gas processing systems
- Chemical and petrochemical industries
- Metallurgy and furnace temperature control
- Industrial HVAC and thermal systems
- General process automation
Installation and System Integration
Recommended installation practices include:
- Installing in Yokogawa FIO / CENTUM I/O racks
- Ensuring correct backplane alignment and secure mounting
- Using proper RTD wiring (2-wire / 3-wire / 4-wire as required)
- Applying shielded cables for noise reduction
- Performing channel calibration during commissioning
Compatible System Components
The AAR181-H00/K4A00 typically works with:
- Yokogawa CENTUM controllers
- RTD temperature sensors (Pt100, Pt1000)
- Other Yokogawa analog and digital I/O modules
- Field termination assemblies
- Process monitoring and control systems
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| AAR181-H00/K4A00 | RTD input module | High-precision temperature measurement | DCS systems |
| AAR145-S50 S1 | RTD/POT input module | Multi-signal temperature/resistance input | Process monitoring |
| AAI835-S53 | Analog I/O module | Multi-channel analog processing | Industrial control |
| AAI543-S53 | Analog input module | High-accuracy analog measurement | Monitoring systems |
| AAT145-S50 | TC/RTD input module | Thermocouple + RTD support | Thermal processes |
Key Advantages
- High-accuracy RTD temperature measurement
- Strong electrical isolation for system stability
- Supports sensor fault detection (burn-out)
- Reliable operation in harsh industrial environments
- Seamless integration with Yokogawa DCS systems
- Suitable for continuous temperature monitoring
Technical FAQs
What is the AAR181-H00/K4A00 used for?
It is used for RTD-based temperature measurement in industrial control systems.
What sensors does it support?
RTD sensors such as Pt100.
Does it detect sensor failure?
Yes, it supports burn-out detection.
Is it a controller module?
No, it is an input module for temperature acquisition.
Conclusion
The Yokogawa AAR181-H00/K4A00 RTD Input Module is a reliable and high-precision temperature measurement component designed for industrial automation systems. With strong isolation, fault detection, and stable signal conversion, it is widely used in process control and monitoring applications.