The FOXBORO FBM212 Thermocouple/mV Differential Input Interface Module is a specialized thermocouple and millivolt (mV) differential input module designed for the Foxboro I/A Series DCS,
primarily used for high-precision temperature and low-level voltage measurement in industrial automation.
Below are its key functions and technical details:
1. Core Functions
Thermocouple and mV Input Support:
Supports multiple thermocouple types (e.g., K, J, T, E, R, S) and low-level mV signals (e.g., strain gauges, load cells) for accurate sensor integration.
Provides channel-to-channel isolation to prevent signal interference and ensure measurement reliability.
High-Precision Measurement:
Uses sigma-delta analog-to-digital conversion for superior accuracy and noise immunity.
Includes burnout detection (high-side) for thermocouple fault monitoring.
Flexible Configuration:
Allows adjustable conversion times and rate limits to optimize performance for specific applications.
Optional mechanical overspeed switches or dual incremental encoders for enhanced functionality (e.g., speed monitoring in rotating machinery).
2. Technical Specifications
Input Channels: 14 isolated differential inputs (configurable for thermocouples or mV signals).
Isolation: Fully isolated channels and power supply for safety.
Cold Junction Compensation (CJC): Built-in for thermocouple accuracy.
Update Rate: Typically 50 ms per channel.
Operating Temp: 0°C to 60°C (standard module).
3. Applications
Process industries: Chemical, oil & gas, and power plants for temperature monitoring.
Industrial automation: Integration with PLC/DCS systems for real-time data acquisition.
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