Introduction — High-Density Precision for Temperature Signal Acquisition
The Yokogawa AST143-S00 TC/mV Input Module is a high-performance industrial interface designed for accurate acquisition of thermocouple (TC) and millivolt (mV) signals in advanced process automation systems. As part of Yokogawa’s CENTUM distributed control architecture, it converts low-level temperature signals into stable digital data for real-time monitoring and control.
Engineered for reliability in continuous industrial operations, this module is widely adopted in environments where temperature precision directly affects process efficiency, product quality, and operational safety.
Technical Specifications
| Parameter | Specification |
|---|
| Module Type | TC / mV Input Module |
| Input Channels | 16 isolated channels |
| Input Signals | Thermocouple (IEC types B, E, J, K, N, R, S, T), mV signals |
| mV Range | -100 to +150 mV (typical configuration) |
| Accuracy | ±40 µV (TC), ±80 µV (mV) at 23°C |
| Input Resistance | ≥ 1 MΩ |
| Isolation Voltage | 1500 V AC |
| Cold Junction Compensation | Built-in, high-precision |
| Data Update Cycle | ≤ 10 ms |
| Operating Temperature | -20°C to +70°C |
| Power Consumption | ~150 mA (5 V DC), ~80 mA (24 V DC) |
| Dimensions (H × W × D) | 120 mm × 100 mm × 39 mm |
| Weight | ~0.30 kg |
Applications — Built for Critical Temperature Monitoring Systems
The AST143-S00 is widely used in industries requiring precise thermal measurement and high channel density:
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Oil and gas refining and upstream processing
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Petrochemical and chemical production plants
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Power generation and turbine control systems
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Steel, metallurgy, and high-temperature furnaces
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Pharmaceutical and fine chemical manufacturing
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Distributed Control System (DCS) temperature monitoring
Its ability to handle multiple thermocouple types per module makes it highly flexible for complex process environments.
Advantages — Accuracy, Density, and Industrial Stability
The AST143-S00 is engineered to deliver dependable performance in demanding automation systems:
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High-density 16-channel input design reduces system footprint
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Supports multiple thermocouple standards for flexible deployment
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Strong electrical isolation enhances noise immunity and safety
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High-resolution measurement ensures stable temperature tracking
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Fast update cycle supports real-time process control
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Built-in cold junction compensation improves thermocouple accuracy
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Seamless integration with Yokogawa CENTUM VP and related platforms
These strengths make it a trusted choice for engineers who prioritize both measurement accuracy and system scalability.
Technical FAQs
1. What is the main function of the AST143-S00 module?
It converts thermocouple and millivolt signals into digital data for process control systems.
2. How many input channels does it support?
It supports 16 isolated input channels.
3. What thermocouple types are supported?
Types B, E, J, K, N, R, S, and T are supported.
4. What is the measurement accuracy?
Typically ±40 µV for TC and ±80 µV for mV signals at 23°C.
5. Does it support millivolt inputs?
Yes, it supports low-level mV signals in addition to thermocouples.
6. What is the isolation rating?
Up to 1500 V AC between circuits and channels.
7. What is the module’s weight?
Approximately 0.30 kg.
8. What systems is it compatible with?
Yokogawa CENTUM VP and related distributed control systems.
9. What is the operating temperature range?
-20°C to +70°C for industrial environments.
10. Is it suitable for high-noise environments?
Yes, it is designed with strong isolation and industrial-grade noise immunity.
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