Overview
Configured for isolated HART analog signal acquisition in EcoStruxure Foxboro DCS systems, the Foxboro P0917XQ (FBM216 HART Communication Redundant Input Interface Module) provides direct electrical execution for 4-20 mA and HART FSK input processing.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | FBM216 (P0917XQ) |
| Brand | Foxboro |
| Product Type | HART Communication Redundant Input Interface Module |
| System Platform | EcoStruxure Foxboro DCS / I/A Series |
| Origin | USA |
| Input Channels | 8 isolated analog input channels |
| Input Signal | 4-20 mA DC analog signals with HART FSK communication |
| Communication Protocol | HART FSK, HCF_SPEC-54 compliant |
| HART Update Rate | 2 messages per second per channel |
| Analog Resolution | 15 bits |
| Analog Accuracy | +/- 0.075% of full scale |
| Update Rate | 100 ms |
| Integration Time | 500 ms |
| Redundancy Configuration | Master/Tracker pair configuration at FBM level |
| Input Resistance | 280 ohm nominal including redundancy adapter |
| Internal Loop Supply Compliance | 18 VDC minimum at 20.5 mA |
| Input Voltage Range | 24 VDC +5% / -10% |
| Power Consumption | 7 W maximum |
| Heat Dissipation | 4 W maximum |
| Galvanic Isolation | Up to 600 VAC common mode potential for 1 minute |
| Operating Temp | -20 deg C to +70 deg C |
| Storage Temp | -40 deg C to +70 deg C |
| Relative Humidity | 5% to 95% non-condensing |
| Contamination Rating | Class G3 per ISA Standard S71.04 |
| Dimensions | 102 mm H x 45 mm W x 104 mm D; 114 mm H including mounting lugs |
| Weight | Approximately 284 g |
4-20 mA HART Loop Protocol and Channel Isolation
The FBM216 processes standard 4-20 mA current loop signals while maintaining HART FSK communication integrity on each input channel. Furthermore, each channel provides electrical isolation to reduce interaction between field devices and control system circuits.
The module supports HART communication at two messages per second per channel. Therefore, connected field transmitters can exchange configuration and diagnostic data through the same analog measurement loop.
The Master/Tracker redundancy arrangement allows two FBM216 modules to operate as a coordinated input pair. As a result, the control system can maintain input acquisition during a single module fault or planned maintenance activity.
Frequently Asked Questions
Q: Can the FBM216 directly process HART communication over a 4-20 mA signal loop?
A: Yes. The FBM216 accepts 4-20 mA analog input signals with superimposed HART FSK digital communication according to HCF_SPEC-54 requirements.
Q: How does FBM-level redundancy operate with the FBM216?
A: Two FBM216 modules operate in a Master/Tracker configuration. The redundant pair shares input processing functions and supports automatic failover between modules.
Q: What isolation capability does the FBM216 provide?
A: The module provides channel/group isolation designed to withstand up to 600 VAC common mode potential for 1 minute.
Field Installation Guidelines
- Install the FBM216 module in the designated Foxboro DCS fieldbus mounting assembly and verify correct module addressing before operation.
- Use shielded instrumentation wiring for 4-20 mA and HART field loops. Connect cable shields according to the site grounding standard to reduce electromagnetic interference.
- Separate analog signal cables from high-voltage power wiring and switching circuits to minimize induced noise.
- Verify loop polarity, transmitter power requirements, and current range before connecting field devices.
- For redundant configurations, install both FBM216 modules according to the Master/Tracker arrangement defined by the control system configuration.
- Confirm grounding, isolation, and terminal connections before applying field power.
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