Description
Product Overview
Foxboro FBM230 (P0926GU) is a 4-port serial field device integration module for Foxboro I/A Series DCS system. It connects the I/A Series controller to serial field instruments, supporting RS232 / RS422 / RS485 physical interfaces, mainly used for Modbus RTU communication with transmitters, analyzers, variable speed drives and other serial field devices. Widely deployed in chemical, petrochemical, power generation and pulp & paper plants, it is a common legacy spare for maintenance and retrofit of existing I/A Series DCS installations.
Technical Specifications
| Parameter | Details |
|---|---|
| Part Number | FBM230 P0926GU |
| Brand | Foxboro (Schneider Electric / Invensys) |
| Type | 4-Channel Serial Communication Module |
| Compatible Platform | Foxboro I/A Series DCS |
| Serial Ports | 4 isolated serial ports, RS232 / RS422 / RS485 configurable |
| Supported Protocol | Modbus RTU, other custom serial protocols |
| Baud Rate | 1200 ~ 19200 bps software configurable |
| Power Supply | 24V DC from I/A rack backplane |
| Power Consumption | Max 2.5W |
| Isolation | Each serial port galvanically isolated |
| Operating Temperature | 0°C ~ +60°C |
| Storage Temperature | -25°C ~ +70°C |
| Humidity | 5~95% RH, non-condensing |
| Mounting | Rack mount inside I/A Series FBM chassis |
| Dimensions | 125 × 75 × 80 mm |
| Net Weight | ~0.32 kg |
| Certifications | CE, UL |
| Product Status | OEM discontinued, aftermarket spare only |
Key Features
- Four independent galvanically isolated serial ports for connecting Modbus RTU field devices
- Software selectable RS232/422/485 interface for mixed serial instrument integration
- Front panel LED indicators for module health, port communication activity and fault alarm
- Supports multi-drop RS485 bus connection for multiple Modbus slave instruments on one channel
- Built-in communication diagnostics to detect bus timeout, parity error and wiring fault
- Hot-swappable module design within I/A Series rack
- Seamless data mapping between serial field devices and I/A control database
Installation & Testing Notes
- Insert FBM230 P0926GU into the designated slot of I/A Series FBM rack
- Terminate RS485 bus cable with proper termination resistor at bus endpoints; pay attention to cable shielding and grounding
- Configure serial port type, baud rate, parity and Modbus slave address via Foxboro I/A engineering workstation
- After power-up, verify front panel LED status and run module self-test
- Perform bus scan to confirm all connected Modbus slaves are online and data read/write normal
- Hot swap is supported; confirm rack state before removing faulty module
- Verify real-time data and alarm transmission from field instruments after commissioning
- Periodically check cable shielding and bus termination in high EMI plant environments
FAQ
Q: What DCS system does FBM230 P0926GU belong to? A: Foxboro I/A Series DCS.
Q: How many serial ports on FBM230? A: 4 isolated serial ports, configurable RS232/422/485.
Q: What protocol does FBM230 mainly use? A: Modbus RTU.
Q: Can FBM230 be hot swapped? A: Yes, hot swap supported on I/A Series rack.
Q: What is the main application? A: Interface between I/A DCS and serial Modbus field instruments, analyzers and drives.
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