Description
Foxboro FBM203 P0914SV
Technical Specifications
- Module Model: FBM203 (P0914SV)
- Channel Configuration: 8 Analog Input (AI) channels
- Signal Type: 3-wire or 4-wire RTD signals
- Bus Interface: 2 Mbps Redundant Fieldbus
Functional Features
- Constant Current Excitation: Built-in precision constant current source for accurate RTD resistance measurement.
- Multi-Wire Support: 3-wire and 4-wire configurations eliminate lead wire resistance effects.
- Complete Electrical Isolation: Full channel-to-channel and channel-to-bus isolation.
- Online Diagnostics: RTD open circuit detection and out-of-range alarms.
Application Scenarios
Widely used in medium-to-low temperature precision measurement including tank temperatures, pipeline fluid temperatures, and pharmaceutical processes.
Performance Parameters
- Measurement Accuracy: High-precision A/D conversion with minimal error.
- Update Rate: All 8 channels updated synchronously.
- Protection Rating: IP20.
Material Composition
Industrial-grade housing with precision constant current source and resistor networks for long-term stability.
Structural Characteristics
Standard 8-channel FBM with front-panel channel status LEDs. Backplane connector supports hot-swapping.
Working Principle
Constant current excites the RTD, voltage drop is measured to calculate resistance, then linearized per RTD tables and converted to temperature values for bus transmission.
Installation Requirements
Use shielded twisted pair with cabinet-side single-point grounding. Ensure correct 3-wire compensation lead matching.
Precautions for Use
Never apply voltage or current signals. Verify RTD type and wire configuration match software settings.
