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| Company Information | ||||||||
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| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Product Introduction
The Yokogawa AMM22TJ Multiplexer Module is a high-precision analog input module designed for advanced process control and monitoring in Yokogawa’s DCS (Distributed Control System) platforms. As part of the AMM series, it is specifically engineered to handle multiple temperature and voltage inputs with exceptional accuracy and stability. The AMM22TJ is commonly used for RTD (Resistance Temperature Detector) and thermocouple signal acquisition, offering multiplexed measurement capability that optimizes input efficiency and minimizes hardware complexity.
The module features advanced signal conditioning, high common-mode noise rejection, and excellent isolation to ensure accurate data acquisition even in electrically noisy environments. Its robust construction allows for stable operation in a wide temperature range, making it ideal for heavy industrial environments such as power generation, petrochemical processing, and manufacturing.
The AMM22TJ integrates seamlessly with Yokogawa’s CENTUM VP, CS3000, and STARDOM systems, ensuring efficient communication and precise measurement performance. It delivers a compact, modular solution that enhances system reliability while maintaining long-term measurement accuracy.
Technical Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Yokogawa Electric Corporation |
| Model | AMM22TJ |
| Product Type | Multiplexer Input Module |
| Function | Acquisition of RTD and voltage input signals |
| Number of Channels | 16 analog input channels |
| Input Type | RTD (2-wire, 3-wire, or 4-wire) / Voltage input |
| Supported RTD Types | Pt100, Pt200, Pt500, Pt1000, Ni100 |
| Input Range (Voltage) | -10 mV to +100 mV, selectable |
| Input Range (RTD) | -200°C to +850°C depending on sensor type |
| Resolution | 16-bit analog-to-digital conversion |
| Accuracy | ±0.1% of full scale typical |
| Cold Junction Compensation | Automatic (for thermocouple mode) |
| Input Isolation | Channel-to-bus and channel-to-ground isolation |
| Sampling Rate | Up to 100 samples per second per channel |
| Input Impedance | ≥ 10 MΩ (voltage input) |
| Common Mode Rejection Ratio (CMRR) | >100 dB |
| Line Noise Rejection | 50/60 Hz filter included |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -20°C to +70°C |
| Relative Humidity | 10% to 90%, non-condensing |
| Power Supply Voltage | 24 V DC (via I/O base) |
| Power Consumption | Approx. 3.8 W |
| Diagnostics | Self-check, open sensor detection, input fault monitoring |
| Mounting Type | Plug-in module for Yokogawa I/O rack |
| Interface | Internal I/O bus communication |
| Cooling Method | Natural convection |
| Dimensions | 45 × 97 × 103 mm |
| Weight | 0.3 kg |
| Compliance | CE, RoHS, IEC 61010-1, IEC 61326-3-1 |
| Protection Features | Overvoltage protection, reverse polarity protection |
| Maintenance | Hot-swappable for easy replacement |
Applications
The Yokogawa AMM22TJ Multiplexer Module is used in a variety of industries that demand reliable and accurate temperature or voltage signal monitoring. Its multiplexed input architecture allows for efficient use of control system resources. Common applications include:
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Power Generation Plants: Monitoring of turbine, boiler, and condenser temperatures to optimize efficiency and prevent overheating.
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Petrochemical and Refining Processes: Real-time temperature control in distillation towers, heat exchangers, and reaction chambers.
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Steel and Metallurgy Industries: High-precision monitoring in furnaces, annealing, and casting operations.
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Pharmaceutical and Biotechnology: Temperature tracking for production, fermentation, and sterilization control.
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Food and Beverage Industry: Maintaining stable process temperatures during cooking, freezing, and pasteurization.
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Semiconductor Manufacturing: Monitoring temperature variations in critical process chambers and equipment.
Advantages
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Multi-Channel Efficiency: 16 input channels per module reduce hardware complexity and save panel space.
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High Precision Measurement: 16-bit resolution ensures fine signal accuracy for both RTD and voltage inputs.
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Wide Sensor Compatibility: Supports multiple RTD types and low-voltage inputs for versatile process monitoring.
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Excellent Noise Rejection: Advanced CMRR and EMI protection guarantee stable readings in industrial environments.
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Built-in Diagnostics: Provides real-time fault detection such as open-circuit sensors and short circuits.
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Seamless System Integration: Fully compatible with Yokogawa DCS systems like CENTUM VP and STARDOM.
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Hot-Swappable Design: Allows module replacement without system shutdown, reducing downtime.
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Robust Construction: Engineered for continuous operation under high temperature and humidity conditions.
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Energy-Efficient Performance: Optimized design minimizes power consumption without compromising accuracy.
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Long-Term Stability: Minimal drift and stable measurement performance over extended operational periods.
FAQ
1. What types of sensors are supported by the AMM22TJ?
The module supports RTD sensors such as Pt100, Pt500, Pt1000, and Ni100, as well as low-level voltage inputs.
2. Does the AMM22TJ support thermocouple inputs?
The primary focus of the AMM22TJ is RTD and voltage signals; thermocouple support may require a dedicated thermocouple module such as AMM21.
3. How does the AMM22TJ handle cold junction compensation?
When used for thermocouple applications, automatic cold junction compensation is integrated to ensure precise temperature measurement.
4. What is the measurement accuracy of the AMM22TJ?
It achieves an accuracy of ±0.1% of full scale, depending on input type and configuration.
5. Can different RTD types be connected simultaneously?
Yes, each channel can be configured independently for different RTD types, enabling mixed signal measurement.
6. How does the module maintain stability in noisy environments?
It uses advanced filtering, channel isolation, and high CMRR to minimize electrical noise interference.
7. What kind of fault detection is available?
It can detect open circuits, short circuits, and signal faults automatically through internal diagnostics.
8. Is the AMM22TJ compatible with Yokogawa CENTUM VP?
Yes, it integrates seamlessly with CENTUM VP, CS3000, and STARDOM systems via standard I/O buses.
9. Can the module be replaced during operation?
Yes, the AMM22TJ supports hot-swapping, allowing maintenance without interrupting system operation.
10. What isolation features are built into the AMM22TJ?
Each input channel is isolated from the bus and from ground to ensure measurement integrity and prevent interference.
Recommended Related Models (Same Series)
| Model | Description |
|---|---|
| AMM21 | Thermocouple Input Multiplexer Module for temperature measurement |
| AMM23 | Universal Input Module for mixed analog signal acquisition |
| AAM10 | Analog Output Module for process control |
| AIM10 | Current Input Module for analog current signals |
| ADV151 | Digital Output Module |
| AAI141 | Standard Analog Input Module for general use |
Popular Yokogawa Models (Same Brand)
| Model | Description |
|---|---|
| CP345 | Central Processor Module for DCS systems |
| PW482 | Power Supply Module for I/O racks |
| ADV144 | Digital Input Module |
| ALR121 | Relay Output Module |
| AAP135 | Analog Output Module |
| SAI533 | Sequence Input Module for automation applications |
