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Yokogawa AAI835 Analog Input/Output Module
roduct Introduction: A high-performance 4-channel analog input and 4-channel analog output module designed for Yokogawa’s CENTUM VP and ProSafe-RS safety systems. It provides fully isolated signal conditioning and conversion, with integrated HART communication for advanced field device management.
Technical Specifications
- Input Channels: 4 channels, 4–20 mA DC
- Output Channels: 4 channels, 4–20 mA DC
- Resolution: 16-bit A/D and D/A conversion
Detailed content
- Accuracy: ±0.1% of span (Input: ±16 µA; Output: ±48 µA)
- Isolation: Full channel-to-channel and channel-to-system isolation (500 V AC for 1 min)
- HART Communication: Built-in HART modem for device diagnostics and configuration
- Input Impedance: 290 Ω at 20 mA, 450 Ω at 4 mA (active)
- Power Supply: 24 V DC ±10%
- Power Consumption: 1.8 W typical
- Dimensions: 45 × 100 × 80 mm
- Weight: 0.3 kg
- Operating Temperature: -20°C to +70°C
Key Features
- Full Isolation: Prevents ground loops and cross-talk between signals.
- HART Integration: Enables remote calibration, diagnostics, and device management.
- High Accuracy: 16-bit resolution ensures precise signal conversion.
- Mixed I/O: Combines AI and AO in one module for space efficiency.
- SIL Capability: Suitable for use in safety-related control systems (ProSafe-RS).
- Diagnostics: Comprehensive channel status and fault detection.
- Easy Configuration: Seamless integration with CENTUM VP engineering tools.
Applications
- Process control loops in oil refineries and petrochemical plants.
- Safety instrumented systems (SIS) in critical process units.
- Power plant analog signal conditioning and control.
- Water treatment process monitoring and control.
- Chemical manufacturing closed-loop control systems.
