Description
Foxboro AD198GV
Technical Specifications
- Output Type: High-precision analog current/voltage output.
- System Compatibility: Foxboro I/A Series DCS.
- Resolution: High-bit D/A conversion for smooth control.
Functional Features
- Fail-Safe Operation: Configurable output states (hold, drop to zero, or go to custom safe value) upon communication loss.
- High Accuracy: Minimal offset and gain error for precise process control.
- Loop Powered/External Power: Flexible power architectures for diverse field applications.
Application Scenarios
Critical control loops in refining, chemical reactors, and turbine speed control.
Performance Parameters
- Update Rate: Fast response to accommodate rapid control algorithms.
- Load Driving: Capable of driving high-impedance and low-impedance field loops.
Material Composition
Industrial-grade components with thermal compensation to maintain accuracy across wide temperature ranges.
Structural Characteristics
- Standard FBM Form Factor: Compatible with standard Foxboro fieldbus module bases.
- Channel Indicators: Individual LEDs for each output channel status.
Working Principle
The module receives digital setpoints via the fieldbus, converts them using a high-resolution DAC, and regulates the output current loop to match the commanded value, continuously monitoring the loop for open-circuit or short-circuit conditions.
Installation Requirements
- Terminate field wiring securely to prevent intermittent connections.
- Ensure the field loop power supply is correctly sized for the connected load.
Usage Precautions
- Never short-circuit voltage outputs or apply external voltage to current output terminals.
- Configure fail-safe states during initial commissioning to ensure plant safety.
