Description
Foxboro FBM03
Technical Specifications
- Model Number: FBM03
- Input Type: RTD (2-wire, 3-wire, 4-wire)
- System Compatibility: Foxboro I/A Series
- Measurement Principle: Precision resistance-to-digital conversion
Functional Features
- Flexible Wiring: Supports 2, 3, and 4-wire RTD configurations to eliminate lead-wire resistance errors.
- High Resolution: High-bit conversion ensures fine temperature resolution for tight control loops.
- Open Circuit Detection: Identifies broken RTD elements and alerts the control system.
Application Scenarios
Widely used in HVAC systems, food and beverage processing, pharmaceutical batch reactors, and precision thermal management applications.
Performance Parameters
- Accuracy: Tight tolerance for precise temperature profiling.
- Excitation Current: Low excitation current to prevent self-heating of the RTD sensor.
Material Composition
Industrial-grade PCB with multi-layer ground planes for superior noise immunity and signal integrity.
Structural Characteristics
- Plug-and-Play: Tool-less insertion and extraction with captive screws.
- Channel Diagnostics: Individual LED indicators for rapid troubleshooting.
Working Principle
The module supplies a precise, constant excitation current through the RTD. It measures the resulting voltage drop, calculates the resistance, and translates it into temperature using standard RTD curves (e.g., Pt100).
Installation Requirements
Ensure all three wires of a 3-wire RTD are of equal length and gauge. Keep RTD cables separated from high-voltage power lines.
Usage Precautions
Do not interchange RTD and thermocouple modules. Verify the RTD curve and wiring configuration in the system software before commissioning.
