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- Yokogawa
- AST143
- TC/mV Input Module
- Japan
- 107.5 × 130 × 32.8 mm
- 0.3 kg
- Xiamen, China
- New & In Stock
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- 1 Year
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
The Yokogawa AST143 is a high-density Thermocouple (TC) and Millivolt (mV) input module designed for distributed control systems (DCS). It is used to acquire low-level temperature signals from thermocouples and millivolt sources, then convert them into digital data for process monitoring and control.
This module is built for high-accuracy industrial temperature measurement and is widely used in demanding process environments such as power plants, oil & gas facilities, and chemical processing systems.
Technical Specifications
| Parameter | Details |
|---|---|
| Product Type | TC / mV Input Module |
| Manufacturer | Yokogawa |
| Model | AST143 |
| Input Types | Thermocouple (TC), Millivolt (mV) |
| Channels | 16 channels |
| Signal Type | Low-level analog temperature signals |
| Application | Industrial temperature monitoring |
| System Compatibility | Yokogawa DCS platforms |
| Isolation | High isolation between channels and system |
| Data Update Period | 10 ms |
| Input Resistance | ≥ 1 MΩ |
| Operating Environment | Industrial automation environments |
| Dimensions | ~120 × 100 × 39 mm |
| Weight | ~0.3 kg |
Function and Working Principle
The AST143 module measures small voltage signals generated by thermocouples or millivolt devices and converts them into digital temperature data for the control system.
Thermocouples generate millivolt-level signals proportional to temperature differences. The module performs signal amplification, cold junction compensation, and analog-to-digital conversion to ensure accurate temperature readings.
This enables:
- Precise temperature measurement from thermocouples
- Millivolt signal acquisition from industrial sensors
- Stable signal conversion in noisy industrial environments
- Real-time process temperature monitoring
- Integration into distributed control systems
Role in Industrial Automation Systems
The AST143 module is used in industrial systems where accurate temperature measurement is critical. It supports:
- Distributed Control Systems (DCS)
- Process automation systems
- Thermal monitoring systems
- Furnace and boiler control systems
- Industrial safety and regulation loops
It ensures stable temperature data acquisition for reliable process control.
Industrial Applications
- Power generation plants
- Oil and gas processing facilities
- Chemical and petrochemical industries
- Steel and metallurgy plants
- Water treatment systems
- Industrial furnace and reactor monitoring
Installation and Integration
- Installed in Yokogawa DCS I/O racks
- Connected directly to thermocouples or mV sensors
- Configured through control system engineering tools
- Requires proper shielding for low-voltage signals
- Designed for continuous industrial operation
Compatible System Components
- Yokogawa DCS controllers
- Thermocouple sensors (Type K, J, T, etc.)
- Millivolt signal transmitters
- Signal conditioning modules
- Distributed I/O systems
Alternative Models
| Model | Description |
|---|---|
| ASR133 | RTD / potentiometer input module |
| ASI133 | Analog input module |
| AAI series | Analog I/O modules |
| ADV series | General-purpose input modules |
| Temperature-specific modules | Dedicated TC/RTD modules |
Key Advantages
- High-density 16-channel input design
- Accurate thermocouple measurement
- Stable millivolt signal processing
- Strong electrical isolation
- Fast data update cycle
- Suitable for harsh industrial environments
Conclusion
The Yokogawa AST143 TC/mV Input Module is a reliable industrial temperature input solution designed for distributed control systems. Its ability to accurately process thermocouple and millivolt signals makes it suitable for critical process industries requiring precise and continuous temperature monitoring.