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- Yokogawa
- AAV144-S50/A4S10
- Voltage Input Module (Isolated)
- Japan
- 107.5 × 130 × 32.8 mm
- 0.2 kg
- Xiamen, China
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Product Overview
The Yokogawa AAV144-S50 / A4S10 Voltage Input Module is a 16-channel isolated analog input module designed for Yokogawa CENTUM Distributed Control Systems (DCS). It is used to collect voltage signals from field instruments and convert them into high-precision digital data for industrial process monitoring and control.
This model is engineered for high reliability, electrical isolation, and strong noise immunity, making it suitable for demanding industrial environments such as oil refineries, chemical plants, and power generation facilities.
The A4S10 configuration includes a surge-absorbing terminal block, improving protection against voltage spikes and electrical disturbances in field wiring systems.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Yokogawa |
| Model | AAV144-S50 / A4S10 |
| Product Type | Isolated Voltage Input Module |
| System Compatibility | CENTUM VP / CENTUM CS 3000 |
| Input Channels | 16 channels (isolated) |
| Input Signal Range | 1–5 V DC / -10 to +10 V DC |
| Allowable Input Voltage | ±30 V DC |
| Input Resistance | 1 MΩ (power ON), 200 kΩ (power OFF) |
| Isolation Voltage | 1500 V AC (input to system, 1 min) |
| A/D Conversion Resolution | 16-bit |
| Data Update Period | 10 ms |
| Accuracy | ±4 mV / ±20 mV |
| Temperature Drift | ±4 mV / 10°C |
| Power Supply | 5 V DC (via backplane) |
| Current Consumption | Max 500 mA |
| Power Dissipation | Approx. 5.5 W |
| Terminal Type | Pressure clamp terminal (A4S10 with surge absorber) |
| Mounting Type | Rack-mounted I/O module |
| Dimensions (H × W × D) | 107.5 × 130 × 32.8 mm |
| Weight | 0.2 kg |
Function and Working Principle
The AAV144-S50 / A4S10 operates as an isolated analog signal interface module between field instruments and the DCS controller.
Its working process includes:
- Receiving analog voltage signals from field devices
- Applying electrical isolation between field and system circuits
- Filtering and conditioning incoming signals
- Converting analog signals into 16-bit digital data
- Transmitting processed data to the DCS in real time
The A4S10 surge absorber terminal design enhances protection against transient voltage spikes, improving long-term system stability.
Role in Industrial Control Systems
Within Yokogawa DCS architecture, this module serves as a front-end data acquisition and isolation unit.
Its key functions include:
- Accurate collection of analog voltage signals
- Electrical isolation between field devices and control system
- Protection against electrical noise and ground loops
- Stable real-time data transmission for control loops
It ensures high process reliability, measurement accuracy, and system safety in industrial automation systems.
Industrial Applications
The AAV144-S50 / A4S10 is widely used in:
- Oil and gas production and refining
- Petrochemical processing plants
- Power generation and turbine control systems
- Chemical manufacturing industries
- Water treatment and utility automation
- Large-scale DCS-based process control systems
It is especially suitable for environments with high electrical noise or unstable field wiring conditions.
Installation and System Integration
Proper installation ensures optimal performance:
- Installed in Yokogawa CENTUM I/O racks or control cabinets
- Connected via system backplane interface
- Field wiring using pressure clamp terminal (A4S10 configuration)
- Shielded cables recommended to reduce noise interference
- Proper grounding required for isolation performance
Configuration is handled through Yokogawa engineering tools within the DCS environment.
Compatible System Components
The AAV144-S50 / A4S10 typically works with:
- Yokogawa CENTUM VP / CS 3000 controllers
- Field voltage transmitters and sensors
- I/O backplane systems
- Signal conditioning modules
- Industrial process instrumentation
These components together form a complete distributed process control architecture.
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| Yokogawa AAV144-S00 / A4S00 | Voltage Input Module | Standard terminal version | General DCS systems |
| Yokogawa AAV144-S00 / K4A00 | Voltage Input Module | KS cable interface | Flexible wiring systems |
| Yokogawa AAV144-S00 / A4S10 | Voltage Input Module | Surge protection terminal | Harsh environments |
| Yokogawa AAV142-S50 | Non-isolated input module | Compact design | Cost-sensitive applications |
| Yokogawa AAI141 | Current input module | 4–20 mA support | Process instrumentation |
Key Advantages
- Fully isolated 16-channel voltage input design
- Integrated surge protection (A4S10 terminal block)
- High resistance to electromagnetic interference
- Stable 16-bit high-resolution conversion
- Fast 10 ms data update cycle
- Compact industrial-grade design
- Reliable long-term continuous operation
- Seamless integration with Yokogawa DCS systems
Technical FAQs
Q1: What is the main function of the AAV144-S50 / A4S10?
It converts isolated analog voltage signals into digital data for DCS processing.
Q2: What is the difference between A4S10 and standard versions?
A4S10 includes surge absorber protection for improved electrical safety.
Q3: What signals does it support?
It supports 1–5 V DC and -10 to +10 V DC voltage inputs.
Q4: Where is it typically used?
It is used in oil & gas, petrochemical, and power generation industries.
Q5: Is it suitable for harsh environments?
Yes, it is designed for high-noise industrial environments with strong isolation and surge protection.
Conclusion
The Yokogawa AAV144-S50 / A4S10 Voltage Input Module is a high-reliability isolated analog input solution designed for industrial DCS systems. With its surge protection capability, strong electrical isolation, and stable signal conversion performance, it ensures accurate and safe voltage measurement in complex industrial environments.
It is widely used in mission-critical automation systems where signal integrity, electrical protection, and long-term operational stability are essential.