Product Overview

The Foxboro FBM202 (Part Number: P0926EQ) serves as a precision temperature and millivolt (mV) interface for the I/A Series Distributed Control System (DCS). This module collects data from eight independent, isolated thermocouple or mV field sensors. To ensure industry-leading measurement accuracy, it includes a dedicated RTD reference channel for cold junction compensation. We supply this unit as 100% Brand New original factory stock, providing a high-reliability solution for critical thermal monitoring in refineries, power plants, and chemical processing facilities.

Technical Specifications

Engineering Advantages

• High-Integrity Thermal Monitoring: The FBM202 handles a variety of thermocouple types and millivolt signals. The integrated RTD reference channel automatically compensates for ambient temperature fluctuations at the termination assembly, ensuring laboratory-grade accuracy in rugged field conditions.

• Galvanic Fault Protection: Each of the eight input channels features independent galvanic isolation. This architecture prevents ground loops and shields the internal DCS logic from field-side electrical surges, ensuring that a fault on one sensor does not compromise the entire module.

• Redundant Fieldbus Architecture: The module connects to the redundant 2 Mbps Foxboro fieldbus. This ensures that the control processor receives continuous temperature data even if a single communication path or Fieldbus Communication Module (FCM) fails.

• Rapid Hot-Swap Capability: The hardware design allows for module replacement without powering down the system or disturbing existing field wiring. This significantly reduces Mean Time to Repair (MTTR) during routine maintenance or hardware upgrades.

• Corrosive Environment Resilience: Standard G3 conformal coating protects the internal circuitry from airborne contaminants. This allows the FBM202 to operate reliably in offshore platforms and chemical plants where corrosive gases are present.

FAQs

• Does the FBM202 support different thermocouple types simultaneously?

  The module supports a wide range of standard thermocouples (including K, J, T, and E). You configure the specific sensor type and range through the I/A Series engineering software for each channel.

• How does the module handle cold junction compensation?

  The FBM202 utilizes a dedicated RTD reference channel located at the termination assembly. This channel monitors the terminal temperature in real-time, allowing the module to adjust the thermocouple readings automatically for precise results.

• Is the P0926EQ a direct replacement for older FBM202 versions?

  Yes, P0926EQ is the standard hardware part number for the FBM202. It fits into existing I/A Series baseplates and integrates seamlessly with current FCP and ZCP control processors.

• Can this module measure standard voltage signals?

  The FBM202 is optimized for low-voltage millivolt (mV) ranges typical of thermocouples. For standard 0-10V or 4-20mA signals, we recommend using the FBM201 or FBM217 modules respectively.