Description
Foxboro FBM02
Technical Specifications
- Model Number: FBM02
- Input Type: Thermocouple / Millivolt
- Channels: 8 Analog Input Channels
- Cold Junction Compensation: Built-in automatic CJC
Functional Features
- Automatic CJC: Continuously measures terminal block temperature to compensate for cold junction errors, ensuring high accuracy.
- Burnout Detection: Detects open thermocouple circuits and drives the signal to a predefined fail-safe state.
- Sigma-Delta Conversion: Utilizes advanced ADC technology to filter out process noise and power line interference.
Application Scenarios
Critical for temperature monitoring in chemical reactors, boilers, furnaces, and distillation columns across the oil, gas, and power sectors.
Performance Parameters
- Accuracy: Exceptional precision with minimal temperature drift over time.
- Update Rate: Fast dynamic response to capture rapid thermal process changes.
Material Composition
Features precision resistors and high-stability reference voltage sources housed in a ruggedized metal enclosure.
Structural Characteristics
- Standard FBM Footprint: Fully compatible with existing I/A Series DIN-rail or rack-mount baseplates.
- Clear Labeling: Silkscreen indicates specific thermocouple type terminals and grounding points.
Working Principle
Raw millivolt signals from thermocouples are amplified, filtered, and converted to digital values. The onboard microprocessor applies linearization and CJC algorithms before transmitting engineering units over the fieldbus.
Installation Requirements
Use proper thermocouple extension wires. Ensure the shield is grounded at the module baseplate to prevent ground loops.
Usage Precautions
Verify the thermocouple type matches the software configuration. Never apply external voltage to the millivolt input terminals.
