The FBM230 acts as a reliable communication bridge between Foxboro control systems and Modbus field devices. It handles Modbus RTU, ASCII, and Modbus/TCP protocols efficiently. Each of its four ports can be independently configured for RS-232, RS-422, or RS-485 standards. Therefore, you can mix different device types on a single module.
Additionally, this driver supports both big endian and little endian data formats. The configuration is fully software-adjustable. This means no hardware jumpers or complicated rewiring. For harsh environments, the FBM230 meets Class G3 specifications. It operates reliably from -20°C to +70°C. You can mount it directly in the field.
The FBM230 offers four serial I/O communication ports. Each port supports up to 16 RS-485 devices in a multidrop setup. Alternatively, you can connect up to four direct RS-232 or RS-422 devices. Transmission rates range from 300 to 115200 baud. The driver uses 8-bit characters with odd, even, or no parity. It also allows 1 or 2 stop bits.
For Ethernet communication, the FBM230 uses Modbus/TCP protocol. This enables integration with modern networked devices. The asynchronous direct connect link works seamlessly with RS-232. Physical wiring follows EIA standards for each interface type.
A maximum of 2000 DCI block connections is supported. Power requirements are modest: 24 V dc with +5% and -10% tolerance. Maximum consumption is only 7 W. Heat dissipation also stays at 7 W maximum. This makes the FBM230 energy-efficient for continuous operation.
The FBM230 measures 102 mm in height (114 mm including mounting lugs). Its width is 45 mm, and depth is 104 mm. These compact dimensions allow installation in tight panels.
For operating conditions, temperature ranges from -20°C to +70°C (-4°F to +158°F). Relative humidity can be 5% to 95% non-condensing. Storage temperature is -40°C to +70°C (-40°F to +158°F). The module is suitable for Class G3 harsh environments as defined in ISA Standard S71.04.
Furthermore, intrinsic safety devices can connect between the termination assembly (TA) and field devices. This expands application possibilities in hazardous areas.
Start by selecting the physical interface for each port. Use software configuration, not hardware jumpers. Wire the termination assembly according to EIA standards for RS-232, RS-422, or RS-485. For RS-485 multidrop, use twisted-pair shielded copper cable. Each bus supports up to 16 devices.
Next, download the appropriate I/O software driver from the protocol library. Configure baud rate, parity, and stop bits per port. Set the data format to big endian or little endian based on your devices. Finally, connect field devices to the TA. Verify communication through the Foxboro control database.
Always use redundant 24 V dc power for critical applications. The FBM230 accepts redundant power inputs automatically.
FBM230 Modbus Master module (1 unit)
Termination assembly (TA) with mounting hardware
DB-25 cable adapter for RS-232 connections
Screw terminal blocks for RS-422 and RS-485 wiring
Grounding lug and label set
Quick start guide (printed)
Note: No certificates or warranty documents are included in this package.
We ship all orders via Fedex, UPS, or DHL. Tracking numbers are provided within 24 hours after dispatch.
1. Can the FBM230 communicate with both serial and TCP/IP devices simultaneously?
Yes, the FBM230 supports Modbus RTU/ASCII on serial ports and Modbus/TCP over Ethernet. Each port operates independently, so you can mix protocols.
2. How many devices can I connect to a single RS-485 port?
You can connect up to 16 RS-485 devices per port. The FBM230 has four ports, giving a total of 64 devices for all RS-485 buses combined.
3. Do I need external converters for RS-422 or RS-485?
No external converters are required. The FBM230 directly supports RS-422 and RS-485 through its termination assembly. Only standard twisted-pair cables are needed.
4. What happens if power fluctuates outside 24 V dc range?
The FBM230 accepts 24 V dc with +5% and -10% tolerance. If power falls outside this range, the module may reset or stop communicating. Use a regulated power supply for best results.
5. Can I replace an existing Modbus gateway with the FBM230 without rewiring all devices?
In most cases, yes. Keep the same physical wiring standards (RS-232, RS-422, or RS-485). Then reconfigure each port’s software settings to match previous baud rates and data formats. The FBM230 integrates directly into Foxboro control databases.
| Brand Name | Foxboro |
| Model No. | FBM230 |
| Product Type | Modbus Master |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
