May 26, 2026

Foxboro FBM231 Product Description

The Foxboro FBM231 (Part Number: P0926GV) is a high-performance Field Device System Integrator (FDSI) module, a key communication component in the Schneider Electric EcoStruxure Foxboro I/A Series and Foxboro Evo™ DCS platforms. Designed for serial field device integration, it acts as a versatile protocol gateway that connects multi-port serial field devices to the DCS control network. Equipped with four software-configurable serial ports and support for up to 64 field devices, it enables seamless integration of third-party serial devices into Foxboro DCS systems. Built with a rugged die-cast aluminum housing and conformal coating, it delivers reliable operation in ISA S71.04 G3 harsh industrial environments, supporting module-level redundancy for mission-critical applications.

Description

Foxboro FBM231 Product Description

Product Overview

Basic Information

Manufacturer: Foxboro (Invensys, now Schneider Electric)
Model: FBM231 (Part Number: P0926GV)
Product Type: Field Device System Integrator (FDSI), Serial Communication Fieldbus Module
Applicable System: EcoStruxure Foxboro I/A Series DCS, Foxboro Evo™ Process Automation System
Mounting Style: DIN rail or standard I/A Series baseplate-mounted
Protection Rating: IP20; die-cast aluminum housing with conformal coating
Certifications: CE, UL, CSA, ATEX compliant; meets ISA S71.04 G3 harsh environment standards
Serial Ports: 4 independent software-configurable ports (RS-232, RS-422, RS-485)
Power Supply: 24 VDC ±10% (21–26 VDC input); supports redundant power inputs
Power Consumption: ≤7 W (maximum per module)
Operating Temperature: -20°C to +70°C (conformal coated); 0°C to +60°C (standard)
Storage Temperature: -40°C to +85°C
Relative Humidity: 5% to 95% non-condensing
Vibration/Shock: Compliant with ISA S71.04 G3; 30 g half-sine shock (11 ms)
MTBF: ≥180,000 hours
Weight: Approximately 0.28 kg
Dimensions: 102 mm (H) × 114 mm (W) × 104 mm (D)
Country of Origin: United States

Function and Positioning

The FBM231 functions as the primary serial communication hub for Foxboro DCS systems, positioned to integrate diverse serial field devices into centralized process control environments where standard I/O modules lack serial connectivity. Its core role is to serve as a protocol converter and data multiplexer, bridging RS-232/RS-422/RS-485 field devices to the DCS control network. Each of its four ports can be independently configured for point-to-point or multi-drop communication, supporting up to 64 devices per module—eliminating the need for external serial gateways. The FBM231 supports 1:1 redundant pairing, with one module acting as master and the other as tracker, enabling seamless auto-failover (≤50 ms) if a module or communication fault occurs. It also supports hot-swap installation and removal, allowing online maintenance without disrupting ongoing control operations. By enabling direct integration of serial devices such as modems, printers, barcode scanners, and third-party controllers, the FBM231 simplifies system architecture, reduces integration costs, and enhances data visibility across the plant.

Core Performance Parameters

Serial Ports: 4 independent software-configurable ports; each supports RS-232, RS-422, or RS-485 (half/full duplex)
Device Capacity: Up to 16 devices per port (multi-drop); 64 devices total per FBM231
Communication Speed: 300 bps to 115.2 kbps (configurable per port)
Controller Compatibility: Foxboro FCP270, FCP280 Field Control Processors; EcoStruxure Foxboro I/A Series DCS
Redundancy Support: 1:1 module-level redundancy; master/tracker auto-switching; redundant power input support
Data Handling: High-speed data multiplexing; real-time serial-to-Ethernet protocol conversion; data consistency checking
Diagnostics: Multi-color LEDs for power, port status, link activity, and fault indication; remote diagnostics via I/A Series System Manager; heartbeat monitoring for redundancy
Hot-Swap Capability: Supported for online installation, removal, or replacement without process shutdown
Configuration: Software-configurable port parameters (baud rate, parity, data bits, stop bits) via Foxboro I/A Series tools
EMI Compliance: Industrial-grade noise immunity (IEC 61000-4-2/3/4/5); G3 harsh environment compliant

General Adaptable Accessories

I/A Series Baseplates: FBM231 dedicated single/redundant baseplates, DIN rail mounting kits, field-mounted enclosures
Serial Cables: RS-232 DB-25 male connector cables, RS-422/RS-485 shielded twisted pair cables, multi-drop bus cables
Termination Assemblies (TA): Dedicated TA modules with selectable bus termination resistors, 24-bit DIP switches for RS-232 configuration
Redundancy Accessories: Redundant 24 VDC power supplies, fault-tolerant interconnection cables, synchronization cables for master/tracker pairs
Mounting & Protection: Anti-vibration brackets, ESD protection modules, conformal coating kits, hazardous area barrier modules
Spare Parts: Replacement aluminum housings, LED indicator assemblies, connector kits, power input terminals, port interface boards

Applicable Equipment and Fields

The FBM231 is designed for process industries requiring seamless integration of serial field devices into Foxboro DCS systems, with a focus on high-reliability, multi-device communication environments. Key sectors include oil and gas (refining, petrochemicals, offshore platforms), thermal and nuclear power generation, chemical manufacturing, pulp and paper, water and wastewater treatment, pharmaceuticals, metals and mining, and fertilizer production. It is ideal for integrating serial devices such as modems, printers, barcode scanners, RFID readers, third-party PLCs, weigh scales, and analytical instruments into DCS control networks. The FBM231’s G3 harsh environment rating, redundant operation, hot-swap capability, and multi-port flexibility make it the preferred communication module for mission-critical applications demanding reliable serial connectivity, simplified system integration, and future-proof scalability.

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