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Product Overview

The Foxboro FBM224 (Part Number: P0926GG) acts as a high-performance gateway between Modbus slave devices and the Foxboro I/A Series Distributed Control System (DCS). This module enables seamless integration of third-party intelligent electronic devices (IEDs)—including flow computers, motor protection relays, and power analyzers—directly into the Foxboro control database. We supply this unit as 100% Brand New original factory stock, ensuring immediate connectivity for your FCP280, FCP270, or CP60 control processors.

Technical Specifications

Feature Specification
Model / Part Number FBM224 / P0926GG
Communication Ports 4 Independent Isolated Ports
Interface Standards RS-232, RS-422, RS-485 (Configurable)
Protocols Modbus RTU / ASCII (Master Capability)
Baud Rates 300 to 115,200 baud
Device Capacity Up to 64 devices per module
Data Points ~2,000 DCI point connections
Isolation Galvanic; 600 V AC for 1 minute
Memory 16 MB SDRAM / 32 MB Flash
Operating Temp –20 °C to +70 °C (Terminal Assembly)
Environmental ISA Class G3 Corrosive Protection
Origin United States

Engineering Advantages

  • Eliminate Communication Noise: Each of the four ports features independent galvanic isolation. This design prevents electrical noise and ground loops from traveling through the Modbus network and damaging the DCS backplane or affecting signal integrity.

  • Universal Protocol Support: The FBM224 handles RS-232, RS-422, and RS-485 physical layers. This versatility allows a single module to interface with diverse field hardware, from legacy PLCs to modern digital power meters, without requiring external converters.

  • Flexible Redundancy: Engineers can pair ports (e.g., Ports 1 & 2) to establish redundant communication paths to critical slave devices. This ensures that a single cable break does not result in the loss of vital process data.

  • Advanced Data Handling: The module supports byte and bit swapping for 2-byte/4-byte integers and IEEE 4-byte floating-point values. This feature simplifies the integration of third-party devices that utilize different "Endian" data formats.

  • Rugged Infrastructure Compatibility: With an ISA Class G3 rating and Class 1 Div 2 certification, the P0926GG operates reliably in corrosive offshore environments and hazardous chemical processing zones.

FAQs

  • Does the FBM224 support both Modbus RTU and ASCII? Yes. The module provides full master capability for both Modbus RTU and Modbus ASCII protocols, which you can configure on a per-port basis to match your field device requirements.

  • How many devices can I connect to a single P0926GG module? The module supports up to 64 devices across its four ports, managing approximately 2,000 Distributed Control Interface (DCI) points, providing ample scalability for complex plant subsystems.

  • Is the P0926GG hot-swappable? Yes. You can install or remove the FBM224 from the modular baseplate without removing power or interrupting the operation of other modules in the system, significantly reducing maintenance downtime.

  • Can this module integrate with an FCP280 processor? Absolutely. The FBM224 is fully compatible with Foxboro FCP280, FCP270, ZCP270, and CP60 control processors.

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