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Product Overview

The Foxboro FBM206 (P0916CQ) provides specialized high-speed pulse processing for the I/A Series Distributed Control System (DCS). This 100% Brand New original module interfaces with flow meters, tachometers, and other pulse-generating field devices. It features eight independent, galvanically isolated channels capable of handling pulse rates up to 25 kHz. The FBM206 executes local application programs for pulse rate totalization and meter scaling, offloading intensive calculation tasks from the central control processor to ensure deterministic system performance in oil & gas, chemical, and power utility sectors.

Technical Specifications

Feature Technical Details
Model / Part Number FBM206 / P0916CQ
Input Channels 8 Isolated Independent Pulse Channels
Pulse Rate Range 10 Hz to 25 kHz (No missing pulses)
Input Voltage Range 7 to 27 V DC
Accuracy 0.01% of reading
Input Impedance 10 kΩ
Isolation Galvanic Isolation (Channel-to-Bus)
Power Consumption 7 W (Maximum)
Heat Dissipation 5 W (Maximum)
Environment Rating Class G3 (Harsh Environments)
Communication Redundant Fieldbus Supported

Engineering Advantages

  • High-Precision Totalization: The module achieves 0.01% accuracy across the entire 10 Hz to 25 kHz frequency spectrum. This precision ensures exact custody transfer measurements and utility billing data for steam, water, and fuel flows.

  • Class G3 Ruggedization: Foxboro builds the FBM206 to withstand Class G3 harsh environments. The internal circuitry resists the corrosive effects of sulfur and chloride vapors, making it suitable for direct installation in refinery process areas or paper mill control rooms.

  • Deterministic Signal Processing: The module runs dedicated pulse input software locally. It manages meter scaling and resolution on a per-module basis, providing the DCS with high-level engineering units rather than raw pulse counts.

  • Superior Noise Immunity: Each of the eight channels features galvanic isolation. This architecture prevents electrical noise generated by large motors or variable frequency drives (VFDs) from corrupting the pulse data or damaging the system backplane.

  • Loop Power Regulation: Integrated current limiting and voltage regulation protect the field device loops. The module safely manages power distribution to external sensors, preventing field-side short circuits from affecting the overall control system integrity.

FAQs

  • What is the difference between FBM206 and FBM206b?

    The FBM206 (P0916CQ) provides 8 pulse input channels. The FBM206b variant reduces the input count to 4 pulse channels and adds 4 isolated 0-20 mA analog output channels for hybrid control applications.

  • Does the FBM206 require an external power supply for the pulses?

    The module accepts 7 to 27 V DC signals. While it provides loop power protection, ensure your field cabling distance accounts for voltage drops to maintain the minimum required compliance voltage at the sensor.

  • How do I configure the pulse rate scaling?

    You configure scaling, totalization, and resolution through the Foxboro I/A Series configuration software. The module stores these parameters locally to continue accurate totalization even if communication with the processor is momentarily interrupted.

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