Overview
The Foxboro P0926GU, also cataloged as the FBM232 Field Device System Integrator Module, operates as a dedicated hardware component for serial device communication within Foxboro I/A Series and Foxboro Evo DCS platforms. The module executes protocol conversion and data integration between external field devices and the DCS control database through configurable serial interfaces.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | P0926GU / FBM232 |
| Brand | Foxboro (Schneider Electric) |
| Product Type | Field Device System Integrator (FDSI) Module |
| System Platform | Foxboro I/A Series and Foxboro Evo DCS |
| Communication Interface | 4 isolated serial ports |
| Serial Standards | RS-232, RS-422, RS-485 software configurable |
| Protocol Support | Downloadable protocol drivers, including Modbus RTU |
| Device Capacity | Up to 64 RS-485 devices or 4 direct RS-232/RS-422 devices |
| Maximum Data Capacity | Up to 2,000 Distributed Control Interface (DCI) block connections |
| Module Fieldbus | Redundant 2 Mbps Module Fieldbus |
| Power Supply | 24 VDC +5%, -10% redundant baseplate supply |
| Power Consumption | 7 W maximum |
| Heat Dissipation | 7 W maximum |
| Operating Temp | -20 deg C to +70 deg C |
| Storage Temp | -40 deg C to +70 deg C |
| Relative Humidity | 5% to 95% non-condensing |
| Contamination Rating | ISA S71.04 Class G3 harsh environment |
| Dimensions | 102 mm x 45 mm x 104 mm |
| Weight | Approx. 284 g |
| Mounting Type | Modular baseplate mounting, DIN rail or rack installation options |
| EMC Compliance | EN 50081-2 and EN 50082-2 |
| Hazardous Area Certification | UL Class I Division 2, ATEX Zone 2 |
DCS Communication and Process Interface Characteristics
The FBM232 module manages serial communication between third-party field devices and Foxboro control databases through downloadable software drivers. Moreover, the module assigns device data into native DCI blocks without requiring custom application programming.
The module supports isolated RS-232, RS-422, and RS-485 interfaces to accommodate different field communication architectures. Therefore, it can connect multiple serial instruments while maintaining electrical separation between communication channels.
In addition, the module uses the Foxboro redundant 2 Mbps Module Fieldbus for communication with the control system. The hardware architecture supports protocol-specific integration, including Modbus RTU master and slave communication functions.
Frequently Asked Questions
Q: Does the FBM232 support multiple serial communication standards?
A: Yes. The module provides four isolated serial ports, and each port can be configured through software for RS-232, RS-422, or RS-485 operation.
Q: How does the module handle third-party device integration?
A: The FBM232 uses downloadable protocol drivers to convert external device communication data into Foxboro DCS database information through DCI block connections.
Q: What power supply configuration does the module require?
A: The module receives redundant 24 VDC power from the Foxboro baseplate connection and consumes a maximum of 7 W.
Field Installation Guidelines
Install the FBM232 module on the designated Foxboro modular baseplate and verify correct mechanical engagement before applying power.
Use shielded communication cables for RS-232, RS-422, and RS-485 field wiring. Connect cable shields according to the site grounding practice to reduce electrical interference on serial communication lines.
Separate serial communication wiring from high-voltage power cables and high-current switching circuits. Maintain correct polarity for RS-485 differential communication terminals and verify termination requirements according to the connected field device specifications.
Before commissioning, confirm the selected protocol driver matches the external device communication parameters, including baud rate, parity, address configuration, and communication mode.
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