Foxboro FBM222 Product Description

The Foxboro FBM222 (part number P0926TL) is a high-performance redundant PROFIBUS DP/PA communication interface module in the Foxboro I/A Series, engineered for the Foxboro I/A Series and Foxboro Evo™ distributed control systems (DCS). It serves as a critical gateway, seamlessly integrating PROFIBUS DP slave devices (such as variable frequency drives, valve positioners, remote I/O modules, and PROFIBUS PA field instruments) into the Foxboro DCS, enabling high-speed, reliable bidirectional data exchange for process monitoring and control. Designed for high-availability industrial applications, the FBM222 delivers robust communication, comprehensive diagnostics, and flexible redundancy options for diverse process industries.

The FBM222 is equipped with two independent, galvanically isolated PROFIBUS ports (RS-485), supporting both PROFIBUS DP (DPV0/DPV1) and PROFIBUS PA protocols to accommodate a wide range of field devices. It operates as a PROFIBUS Class 1/Class 2 master, capable of managing up to 125 slave devices per port with a maximum data length of 244 bytes per slave, ensuring efficient data transmission for large-scale device networks. The module supports automatic baud rate detection ranging from 9.6 kbps to 12 Mbps, adapting to diverse fieldbus communication requirements without manual configuration.

Communication with the DCS controller (FCP/ZCP) is via a redundant 2 Mbps HDLC fieldbus with automatic A/B path failover, eliminating data loss during communication path disruptions and ensuring continuous data transmission. The FBM222 supports module-level redundancy (dual FBM222 hot standby) and port redundancy, providing comprehensive fault tolerance for mission-critical applications. It also features hot-swap capability, allowing online replacement without shutting down the DCS or interrupting process control—essential for continuous, high-availability operations.

Rugged construction includes a die-cast aluminum enclosure and conformal-coated printed circuit board (PCB), rated to withstand dust, moisture, vibration, and wide temperature fluctuations. It complies with ISA S71.04 Class G3 harsh environment standards and carries intrinsic safety certifications (ATEX/IECEx) for deployment in hazardous, explosive atmospheres common in oil, gas, and chemical industries.

Front-panel LED indicators provide clear visual status for power, communication, and port activity, enabling quick on-site troubleshooting without specialized tools. Built-in advanced diagnostics continuously monitor signal quality, power status, and communication health, providing real-time fault detection and alerts to minimize unplanned downtime.

Manufacturer: Foxboro (Schneider Electric)Compatible Systems: Foxboro I/A Series DCS, Foxboro Evo™ DCSModel/Part Number: FBM222 (P0926TL)Communication Ports: 2 isolated PROFIBUS DP/PA ports (RS-485)Supported Protocols: PROFIBUS DPV0, DPV1, PROFIBUS PABaud Rate: 9.6 kbps to 12 Mbps (automatic detection)Slave Device Capacity: Up to 125 slaves per portMax Data Length: 244 bytes per slaveCommunication with DCS: Redundant 2 Mbps HDLC fieldbus, A/B path redundancy with automatic failoverPower Supply: 24 V DC (operating range: 18–30 V DC); max power consumption < 5 WIsolation: 2500 V AC (port-to-port, port-to-chassis)Operating Temperature: 0 °C to +60 °C (32 °F to +140 °F); extended range –40 °C to +85 °C for hazardous areasStorage Temperature: –40 °C to +85 °C (–40 °F to +185 °F)Relative Humidity: 5%–95% non-condensingAltitude: –300 m to +3,000 m (–1,000 ft to +10,000 ft)Enclosure: Die-cast aluminum, conformal-coated PCB; IP20 ratingDimensions: Approximately 102 mm × 45 mm × 104 mm (4.0 in × 1.8 in × 4.1 in)Weight: Approximately 0.25 kg (0.55 lb)Certifications: CE, UL, CSA, ATEX, IECEx, ISA S71.04 Class G3; compliant with EMC Class A (IEC 61000-6-2)

The FBM222 is widely deployed across process industries requiring reliable PROFIBUS DP/PA integration for critical process monitoring and control. In chemical and petrochemical plants, it connects DCS systems to PROFIBUS-compatible pressure, level, flow, and temperature transmitters, as well as variable frequency drives and valve positioners on reactors, distillation columns, and pipelines, enabling precise process regulation.

In oil and gas facilities—including refineries, offshore platforms, and gas processing stations—it monitors wellhead pressure, pipeline flow, and storage tank level transmitters, and controls choke valves, separator actuators, and compressor capacity controls, ensuring safe, efficient hydrocarbon production even in hazardous explosive atmospheres.

In power generation plants, the FBM222 links DCS systems to PROFIBUS field devices for boiler temperature/pressure sensors, turbine vibration/speed transmitters, and generator excitation control signals, while controlling steam valves, feedwater pumps, and cooling fan actuators for reliable, efficient power plant operation.

In water and wastewater treatment plants, it interfaces with PROFIBUS-compatible pH, dissolved oxygen, turbidity, and level transmitters, and controls dosing pumps, gate valves, and aeration blowers for precise, compliant treatment process control.

In pharmaceutical, food and beverage, and fine chemical industries, the FBM222’s intrinsic safety, high isolation, and regulatory certifications make it suitable for controlled, hygienic, and hazardous processes requiring strict signal integrity and safety compliance, while its compact size and hot-swap capability minimize downtime in space-constrained cabinets.

The FBM222 installs on standard DIN rails in Foxboro I/A Series or Evo™ DCS cabinets, mounting on a dedicated I/A Series baseplate for power distribution and redundant fieldbus communication with the DCS backplane. Field wiring connects to a compatible PROFIBUS termination assembly (TA), which provides surge protection, signal conditioning, and bus termination, supporting both local and remote wiring configurations.

Standard shielded twisted-pair cables are recommended for PROFIBUS field wiring, with proper grounding and bus termination to optimize noise immunity and ensure reliable signal transmission. Each PROFIBUS port wires to a daisy-chain of slave devices, with the TA providing bus termination to prevent signal reflection and ensure communication stability.

System configuration is performed via Foxboro DCS software, enabling users to configure PROFIBUS port parameters, assign slave devices, map process data to DCS tags, and set up redundant communication modes. The module is plug-and-play compatible with existing Foxboro systems, requiring minimal on-site setup and supporting hot-swap replacement for maintenance without system shutdown. It integrates seamlessly with other I/A Series modules, including controllers, analog/discrete I/O modules, and communication cards, forming a unified, scalable process control solution.

Routine maintenance for the FBM222 includes visual inspection of the aluminum enclosure for physical damage, dust accumulation, or loose connections, and verification of front-panel LED indicators for normal power, communication, and port operation. Periodic testing of PROFIBUS communication integrity, signal quality, and power supply stability is recommended, especially in high-vibration, corrosive, or strong electromagnetic interference environments. The conformal coating on the PCB protects against moisture and dust, reducing cleaning frequency.

Faulty modules can be repaired by authorized Schneider Electric service providers, with standard and expedited repair options available for critical applications. The FBM222 comes with a 12-month standard warranty against manufacturing defects, with extended warranty options available for long-term operational reliability. For redundant communication configurations, periodic testing of path failover functionality is recommended to ensure fault tolerance readiness.