Overview
The FOXBORO FBM215-218 P0917XV is a Fieldbus Module (FBM) designed for analog output control in the Foxboro I/A Series distributed control system. It combines FBM215 and FBM218 output configurations, supporting 4-20 mA signals with HART communication. Furthermore, its channel isolation and master-tracker redundancy functions support independent signal handling and backup operation in configured redundant systems.
Output Configuration and HART Communication
The module provides analog output channels for transmitting control signals to field devices. Its 4-20 mA output supports HART FSK communication, allowing the control system to exchange digital information with compatible field instruments over the analog signal wiring.
In addition, HART communication supports device parameter access and diagnostic information exchange. This enables maintenance personnel to retrieve field device information while the module continues to handle analog output signals.
Channel Isolation and Redundancy
The module provides galvanic isolation between channels, field ground and module logic. The specified isolation rating is 600 V AC for 1 minute, which helps limit electrical interference and protects module-side circuits from field-side electrical disturbances.
Furthermore, the master-tracker redundancy arrangement uses a primary module and a tracking module. If the primary module fails, the configured system can transfer control to the backup module. The arrangement uses a shared terminal assembly.
Output Fault Handling
The module supports configurable output behavior under fault conditions. Depending on the application configuration, it can hold the last output value or switch the output to 0 mA. Therefore, the selected fault response should match the requirements of the connected control loop and field device.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | FBM215-218 P0917XV |
| Brand | FOXBORO (Schneider Electric) |
| Product Type | Redundant HART Analog Output Module |
| Output Configuration | FBM215: 8 channels / FBM218: 4 redundant channels |
| Output Signal | 4-20 mA analog with HART FSK |
| HART Frequencies | 1200 Hz / 2200 Hz |
| Analog Accuracy | +/-0.05% of span |
| Isolation | Channel-to-channel and channel-to-ground |
| Isolation Rating | 600 V AC for 1 minute |
| Supply Voltage | 24 VDC |
| Supply Voltage Range | 18-36 VDC |
| Power Consumption | Maximum 8.5 W per module |
| Communication Protocol | HART |
| HART Command Support | Universal and Common Practice Commands |
| Redundancy Mode | Master-tracker |
| Failover | Automatic transfer to backup module |
| Terminal Assembly | Shared terminal assembly |
| Fault Response | Hold last value / fallback to 0 mA |
| Operating Temperature | 0 to 60 deg C |
| Relative Humidity | 5-95%, non-condensing |
| Corrosion Resistance | G3 corrosive environment rating |
| Mounting | DIN rail / I/A Series rack mount |
| Dimensions | 147 x 51.5 x 114 mm |
| Weight | 0.6 kg |
Frequently Asked Questions
Q: Does the FBM215-218 P0917XV support HART communication?
A: Yes. It supports HART communication over 4-20 mA analog output signals, allowing compatible field instruments to exchange digital configuration and diagnostic information with the control system.
Q: What is the difference between the FBM215 and FBM218 configurations?
A: The supplied specifications identify FBM215 as an 8-channel non-redundant configuration and FBM218 as a 4-channel redundant configuration. The actual channel arrangement should be confirmed against the module hardware and system configuration.
Q: How does the module handle output faults?
A: It supports two configurable fault responses: holding the last output value or falling back to 0 mA. The appropriate response depends on the control strategy and connected field equipment.
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