Overview
The Foxboro FBM214 P0916DC, also cataloged as the FBM214 HART Communication Input Module, operates as a dedicated hardware component for 4-20 mA HART signal acquisition within Foxboro I/A Series and Foxboro DCS platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | FBM214 P0916DC |
| Brand | Foxboro |
| Origin | United States |
| Product Type | HART Communication Input Module |
| Channels | 8 input channels, group isolated |
| Input Signal | 4-20 mA DC analog input with superimposed HART digital communication |
| HART Protocol | HART v5, v6, and v7 compatible |
| HART Communication Speed | 1200 baud, half-duplex point-to-point master/slave |
| A/D Resolution | 15-bit analog-to-digital conversion |
| Accuracy | +/- 0.03% of full scale including non-linearity |
| Update Rate | 100 ms |
| Integration Time | 500 ms |
| Sense Resistor | 61.9 ohm nominal |
| Total Input Resistance | 280 ohm minimum |
| Compliance Voltage | 18 VDC minimum at 20.5 mA |
| Power Supply | 24 VDC (+5%, -10%) |
| Power Consumption | 7 W maximum |
| Heat Dissipation | 4 W maximum |
| Field Power | 24 VDC isolated transmitter loop supply |
| Current Limiting | Less than 30 mA nominal channel limit, 85 mA maximum short circuit limit |
| Isolation | 600 VAC withstand for 1 minute between isolated groups and earth ground |
| Common Mode Rejection | Greater than 100 dB at 50 Hz / 60 Hz |
| Normal Mode Rejection | Greater than 35 dB at 50 Hz / 60 Hz |
| Operating Temp | -20 deg C to +70 deg C |
| Storage Temp | -40 deg C to +85 deg C |
| Relative Humidity | 5% to 95% non-condensing |
| Environment Class | ISA S71.04 Class G3 harsh environment |
| Weight | Approx. 284 g |
| Dimensions | 102 mm H x 45 mm W x 104 mm D |
| Mounting | Foxboro 200 Series modular baseplate, DIN rail mounting |
4-20 mA HART Loop Protocol and Channel Isolation
The Foxboro FBM214 P0916DC processes analog and digital field signals through an integrated HART communication interface. Each channel accepts a 4-20 mA DC measurement loop while extracting HART digital data superimposed on the current signal.
Furthermore, the module applies channel group isolation to separate field circuits from logic circuits and earth ground. This design reduces electrical interference during multi-loop transmitter operation and maintains signal separation across the DCS I/O architecture.
The module communicates with Foxboro Fieldbus Communication Modules (FCMs) or Field Control Processors (FCPs) through redundant 2 Mbps module fieldbus connections. Therefore, field measurement data and HART device information transfer through the Foxboro I/A Series control network.
Frequently Asked Questions
Q: Does the Foxboro FBM214 P0916DC support standard 4-20 mA transmitters without HART communication?
A: Yes. The module accepts conventional 4-20 mA DC analog input signals and can also process HART digital communication when available.
Q: What isolation method does the FBM214 P0916DC provide?
A: The module provides group isolation between field input circuits, module logic, and earth ground with a 600 VAC withstand rating for 1 minute.
Q: Can the FBM214 P0916DC provide field power for loop-powered transmitters?
A: Yes. The module provides isolated 24 VDC field power for supported loop-powered transmitter applications with channel current limiting protection.
Field Installation Guidelines
Install the Foxboro FBM214 P0916DC module on the specified Foxboro 200 Series modular baseplate before connecting field wiring.
Verify that the 24 VDC supply polarity matches the module power requirements before energizing the assembly. Use shielded instrumentation cables for analog and HART loops, and connect cable shields according to the plant grounding standard.
Keep low-level analog signal wiring separated from high-voltage power cables, motor circuits, and switching devices to reduce electromagnetic interference.
Confirm transmitter loop resistance, field power availability, and HART communication wiring before commissioning. Check each channel input value through the DCS engineering workstation after installation.
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