1. Product Description
The FBM202 (P0926EQ) from FOXBORO is a compact and high-performance Thermocouple/mV Input Module designed for industrial automation systems, particularly within the FOXBORO I/A Series Distributed Control System (DCS). This specific FBM202 (P0926EQ) model provides eight isolated and independent input channels for Thermocouple or mV signals, along with one isolated RTD reference junction compensation channel for accurate temperature measurements. The FBM202 (P0926EQ) is engineered to interface electrical input signals from field temperature sensors to the Fieldbus, ensuring reliable and accurate data acquisition. Each input channel of the FBM202 (P0926EQ) is galvanically isolated from other channels and ground, enhancing signal integrity and system robustness. The module also features thermocouple burnout detection (upscale) and performs signal conversion using independent Sigma-Delta converters for each channel, providing high accuracy and a software-configurable integration period to minimize noise.
2. Product Parameters
The key technical parameters for the FBM202 (P0926EQ) FOXBORO Thermocouple/mV Input Module include:
3. Advantages and Features
The FBM202 (P0926EQ) FOXBORO Thermocouple/mV Input Module offers several key advantages and features for industrial temperature and low-voltage signal measurement:
- High Accuracy and Reliability: Incorporates Sigma-Delta A/D conversion per channel for precise and stable readings.
- Wide Input Range: Supports various standard thermocouple types and millivolt signals, providing versatility for different applications.
- Channel Isolation: Each of the eight input channels is galvanically isolated, preventing ground loops and interference, leading to more accurate measurements and increased system reliability.
- Integrated Reference Junction Compensation: Features a dedicated isolated RTD input for accurate cold junction compensation, crucial for precise thermocouple measurements.
- Thermocouple Burnout Detection: Provides upscale detection of thermocouple burnout, allowing for quick identification of sensor failures.
- Software Configurable Integration Period: Enables users to configure the integration time to filter out process noise and power line frequencies, improving signal quality.
- Compact and Rugged Design: The compact form factor allows for high-density mounting, and the rugged extruded aluminum exterior provides physical protection for harsh industrial environments (Class G3).
- Easy Removal and Replacement: The module can be replaced without disconnecting field wiring, power, or communication cables, minimizing downtime.
- Visual Status Indicators: LEDs on the front of the module provide clear visual indication of the FBM’s operational status.
- Compliance with Standards: Complies with European RoHS Directive and is suitable for use in hazardous locations and potentially explosive atmospheres (refer to specific certifications).
4. Application Fields and Application Cases
The FBM202 (P0926EQ) FOXBORO Thermocouple/mV Input Module is widely used in various industrial automation applications where accurate and reliable temperature and low-voltage signal monitoring is critical, including:
- Process Industries: Temperature monitoring in chemical reactors, distillation columns, heat exchangers, and pipelines.
- Power Generation: Monitoring boiler temperatures, turbine exhaust temperatures, and bearing temperatures.
- Oil and Gas: Temperature monitoring in wellheads, pipelines, and processing equipment.
- HVAC and Building Automation: Monitoring temperatures in large-scale climate control systems.
- Environmental Monitoring: Measuring temperatures in various environmental monitoring stations.
Application Case: In a large chemical processing plant, the FBM202 (P0926EQ) modules are used to monitor the temperature of multiple points within a critical reactor using various types of thermocouples. The isolated input channels ensure that ground loops and electrical noise from nearby equipment do not affect the accuracy of the temperature readings. The integrated RTD reference junction compensation provides precise cold junction compensation for the thermocouples, and the software-configurable integration period filters out any electrical interference from the plant’s power system. If a thermocouple fails (burnout), the upscale detection feature immediately flags the issue to the control system, allowing for timely maintenance and preventing potential process disruptions.
