Yokogawa AAI841-S00 S2 Analog I/O Module
Product Overview
The Yokogawa AAI841-S00 S2 is an advanced 8-channel isolated analog input module designed for use with the CENTUM VP and CS 3000 distributed control systems. It supports 4–20 mA analog current signals and is HART-enabled for intelligent field device communication. Each channel is galvanically isolated to ensure signal integrity and reduce noise interference. Built for high-accuracy process control and robust industrial environments, this module enhances data acquisition performance in critical applications such as chemical processing, oil & gas, and power generation.
Key Features
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8 Isolated Analog Input Channels – Provides channel-to-channel isolation to reduce crosstalk and enhance signal clarity
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HART Protocol Support – Enables two-way digital communication with HART-compatible field instruments
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High Resolution and Accuracy – Offers precise 16-bit signal conversion for detailed and reliable measurements
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Fault Detection and Diagnostics – Built-in features for loop monitoring, wire break detection, and status indication
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Hot-Swappable Design – Allows for live replacement of the module without disrupting system operation
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Long-Term Stability – Minimal drift and high immunity to environmental factors ensure consistent operation
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DCS Compatibility – Fully integrates with Yokogawa’s CENTUM VP and CS 3000 systems for seamless process control
Technical Specifications
3.1 Dimensions and Weight
| Item | Specification |
|---|---|
| Dimensions | 107.5 × 32.8 × 130 mm |
| Weight | 0.3 kg |
3.2 Electrical Characteristics
| Item | Specification |
|---|---|
| Input Type | Analog current (4–20 mA) |
| Channels | 8 (isolated) |
| Input Resistance | Approx. 250 Ω |
| Resolution | 16 bits |
| Accuracy | ±0.1% of span |
| Isolation | Channel-to-channel and channel-to-system isolation |
3.3 Environmental Characteristics
| Item | Specification |
|---|---|
| Operating Temp | 0°C to +55°C |
| Storage Temp | -40°C to +70°C |
| Humidity | 5%–95% RH (non-condensing) |
| Vibration | IEC 60068-2 compliant |
| Protection | IP20 (when mounted in rack) |
3.4 System Compatibility
| Item | Specification |
|---|---|
| Compatible Systems | Yokogawa CENTUM VP / CS 3000 |
| Communication | HART-enabled (requires appropriate TB) |
| Module Type | Analog Input Module (Isolated) |
Industry Applications
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Oil & Gas – Delivers accurate measurement of critical parameters in refineries and upstream production facilities
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Chemical and Petrochemical – Ensures reliable data acquisition for process control and safety compliance
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Power Generation – Interfaces with field sensors for real-time monitoring of turbines, boilers, and auxiliaries
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Pharmaceuticals – Supports high-integrity analog input requirements in GMP-compliant production environments
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Water Treatment – Acquires signals from sensors monitoring flow, pressure, and chemical dosing in treatment systems
The Yokogawa AAI841-S00 S2 Analog I/O Module offers superior performance for high-reliability signal acquisition in process automation. With its channel isolation, HART communication, and robust diagnostics, it is well-suited for critical applications where accuracy, stability, and maintainability are essential.
