Overview
The Foxboro FBM214 is a HART Communication Input Interface Module in the Foxboro 200 Series FBM family. It provides eight group-isolated analog input channels, each accepting a 4-20 mA signal with digital HART communication. Furthermore, it acts as a HART field device host, allowing the I/A Series system to request and receive digital messages from connected field devices for device configuration and communication.
HART Communication and Input Function
The FBM214 supports a combination of standard 4-20 mA devices and HART-enabled field devices. Each of its eight input channels accepts an analog current signal, while HART devices can transmit digital information over the same 4-20 mA signal wiring.
The module supports up to two digital HART messages per second from a field device. In addition, its message pass-through function supports HART Universal, Common Practice, and Device-Specific commands through the Intelligent Field Device Configurator (IFDC).
The module does not support HART burst communication mode. Therefore, applications requiring continuous burst-mode communication should account for this limitation during system configuration.
Channel Isolation and Power Supply
The FBM214 provides eight group-isolated analog input channels and a common isolated power supply for all eight channels. Alternatively, an external power supply can power the channels.
When a common external power supply serves two or more channels, a cable balun is required according to the module’s power-supply arrangement. This condition should be considered when selecting the field wiring and external power distribution configuration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | FBM214 |
| Brand | Foxboro |
| Product Type | HART Analog Input Module |
| I/O Function | HART Analog Input |
| Channel Configuration | 8 inputs |
| Signal Range | 4-20 mA with HART |
| Channel Isolation | 8 group-isolated channels |
| HART Communication Rate | 2 digital messages per second |
| HART Command Support | Universal, Common Practice, Device-Specific |
| HART Burst Mode | Not supported |
| Module Fieldbus | Redundant 2 Mbps |
| Supply Voltage | 24 VDC |
| Mounting | Modular baseplate |
| Operating Temperature | -20 to +70 deg C |
| Module Series | 200 Series FBM |
| System Platform | Foxboro DCS |
Frequently Asked Questions
Q: How many input channels does the Foxboro FBM214 provide?
A: The FBM214 provides eight group-isolated analog input channels. Each channel accepts a 4-20 mA signal and supports digital HART communication when connected to a HART-enabled field device.
Q: Can the FBM214 communicate with standard 4-20 mA devices?
A: Yes. The module supports any combination of standard 4-20 mA devices and HART-enabled devices across its eight input channels.
Q: Does the FBM214 support HART burst communication?
A: No. The FBM214 supports HART Universal, Common Practice, and Device-Specific commands through message pass-through, but it does not support burst communication mode.
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