Overview
Configured for 4-20 mA HART signal output execution in Foxboro I/A Series and Foxboro Evo DCS platforms, the Foxboro FBM215 P0916DB (FBM215 HART Communication Output Interface Module) provides direct physical and electrical control signal transmission through eight isolated output channels.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | FBM215 |
| Brand | Foxboro |
| Origin | Schneider Electric / Foxboro |
| Module Type | HART Communication Output Interface Module |
| Part Number | P0916DB |
| Number of Channels | 8 channel-isolated analog output channels |
| Output Signal | 4-20 mA DC with digital HART FSK communication |
| Analog Output Accuracy | +/-0.05% of span |
| Output Load | 750 ohm maximum |
| Resolution | 13 bits |
| Output Response Rate | 20 mA change within 60 milliseconds |
| HART Communication Rate | Up to 2 digital HART messages per second per channel |
| Input Voltage | 24 VDC +/-5% redundant baseplate supply |
| Power Consumption | 7 W maximum |
| Heat Dissipation | 5 W maximum |
| Fieldbus Communication | Redundant 2 Mbps HDLC Module Fieldbus |
| Weight | Approx. 284 g |
| Dimensions | 102 mm x 45 mm x 104 mm |
| 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 |
| Environmental Rating | ISA S71.04 Class G3 |
| Mounting | 200 Series Baseplate, DIN rail or rack installation |
| Replacement Function | Hot-swappable module replacement without disturbing adjacent modules |
4-20 mA HART Loop Protocol and Channel Isolation
The FBM215 implements eight independent output channels with channel-to-channel galvanic isolation. Each channel generates a continuous 4-20 mA analog current output and supports HART Frequency Shift Keying communication superimposed on the current loop.
Furthermore, each output channel contains dedicated HART communication circuitry for universal, common practice, and device-specific commands. The isolated design reduces ground loop influence and improves signal separation between field devices.
The module operates through the Foxboro redundant 2 Mbps Module Fieldbus. Therefore, the controller maintains communication through the secondary fieldbus path when the primary communication path becomes unavailable.
Frequently Asked Questions
Q: Does the FBM215 support HART communication without interrupting the analog output signal?
A: Yes. The module superimposes the digital HART FSK signal on the 4-20 mA output loop while maintaining the analog current output function.
Q: Can the FBM215 be replaced while the DCS system remains powered?
A: Yes. The module supports hot-swappable replacement on compatible 200 Series baseplates. Field wiring remains connected during module replacement.
Q: How does the FBM215 prevent output channel interference?
A: The module uses channel-to-channel galvanic isolation to separate individual output circuits from each other, field connections, and module logic.
Field Installation Guidelines
- Install the FBM215 on an approved Foxboro 200 Series baseplate with correct mechanical alignment.
- Verify the 24 VDC redundant power supply connection before module insertion.
- Route 4-20 mA field wiring separately from high-voltage power cables to reduce electrical noise coupling.
- Connect shielded instrumentation cables according to the plant grounding standard.
- Confirm HART field device compatibility before commissioning communication functions.
- Check output loop resistance to ensure it remains within the specified 750 ohm maximum load range.
- Verify channel assignment, controller configuration, and HART device addressing before applying process control commands.
Reviews
There are no reviews yet.