Foxboro P0926GU (FBM230) I/A Series 4-Channel Isolated Serial Communication Module

Description

Foxboro P0926GU (FBM230) I/A Series 4-Channel Isolated Serial Communication Module

Product Description

The P0926GU is the hardware part number for Foxboro FBM230, a field bus module dedicated to Foxboro I/A Series DCS. It provides 4 galvanically isolated serial ports, each configurable for RS232 / RS422 / RS485 physical interface. It supports Modbus RTU, Modbus ASCII and other serial protocols, serving as a protocol gateway between I/A DCS controller and legacy serial field devices: flow meters, analyzers, weighing controllers, VFD and remote serial instruments. Each channel has independent isolation to eliminate ground loop interference between DCS rack and field wiring. It communicates with I/A Field Control Processor (FCP) via the FBM field bus. This is a widely used spare module for integrating serial third-party instruments into I/A DCS, commonly deployed in power, oil & gas and petrochemical plants.

FBM230 P0926GU

Technical Specifications

• Part Number: P0926GU, module designation FBM230
• Manufacturer: Foxboro (Schneider Electric)
• Series: I/A Series DCS
• Device Type: 4-CH Isolated Serial Communication FBM Module
• Serial Ports: 4 independent, galvanically isolated ports, jumper selectable RS232/RS422/RS485
• Supported Protocols: Modbus RTU, Modbus ASCII
• Baud Rate: 300 ~ 19200 bps
• Power Supply: 24VDC
• Power Consumption: ≤2W
• Isolation: Channel-to-backplane galvanic isolation
• LED Indicators: Per-channel TX/RX + module operational status LED
• Operating Temperature: -40°C ~ +70°C
• Storage Temperature: -40°C ~ +85°C
• Relative Humidity: 5%~95%, non-condensing
• Mounting: DIN rail mount, I/A FBM standard enclosure
• Weight: Approx. 0.15 kg
• Certifications: CE

Key Features

1. Four fully independent, electrically isolated serial communication channels
2. Each port configurable RS232/422/485, supports Modbus RTU / ASCII
3. Channel isolation protects DCS rack from surge and ground-loop noise
4. Per-channel TX/RX LED indicators for fast field troubleshooting
5. Bidirectional data mapping between I/A DCS controller and serial field instruments
6. Compact FBM modular design, easy installation and spare replacement
7. Supports multi-drop RS485 bus connection for multiple Modbus slaves
8. Compatible with I/A Series FCP270 / FCP280 field control processors

Application Scenarios

• Petrochemical refinery Modbus flowmeter, level transmitter and online analyser integration
• Thermal power plant auxiliary equipment serial instrument data collection
• Oil & gas pipeline SCADA serial meter and remote device communication
• Pulp & paper mill weighing instruments and VFD serial interface to I/A DCS
• Chemical plant legacy serial devices migration to Foxboro I/A system
• Water treatment plant Modbus analysers and valve controller communication
• Fertilizer plant multi-drop RS485 instrument network
• Spare replacement and retrofitting of existing I/A Series DCS serial interfaces

FBM230 P0926GU

Matching / Auxiliary Components

• Foxboro I/A Series FCP270 / FCP280 Field Control Processor
• I/A FBM fieldbus cable and terminal base
• Shielded twisted pair serial cable for RS485 / RS422
• 120Ω bus termination resistor for RS485 network
• I/A Series engineering workstation and DCS configuration software
• 24VDC isolated power supply for FBM
• Junction box and surge protection for field serial wiring
• Modbus RTU field instruments: transmitters, analyzers, variable frequency drives

Related Foxboro I/A Series FBM Spare Parts (9 pcs)

1. P0926GU FBM230 4-CH Isolated Serial Communication Module
2. P0961BC FBM204 4CH 4-20mA Analog Input
3. P0916TA FBM242 Digital Output Module
4. P0914XJ FBM214 RTD Input Module
5. P0903YV FBM218 Thermocouple Input Module
6. P0924WV I/A USB Annunciator Keyboard
7. P0917QE Workstation Power Supply
8. P0914TD Workstation Fan Assembly
9. P0904HA Operator Display Board