The FOXBORO FBM216 P0917TN is an 8-channel redundant HART input module for the Foxboro I/A series DCS. It features channel-independent isolation and redundant configuration capabilities, is compatible with 4-20mA and HART devices, and supports HART master station communication as well as message pass-through, delivering a high-precision and highly reliable solution for signal acquisition and digital communication in industrial process control.
Core Features
Channel Configuration
Equipped with 8 independently isolated input channels, supporting any combination of 4-20mA analog signals and HART digital signals with electrical signal compatibility, suitable for various standard field instruments.
Redundant Design
Supports module-level redundancy; a pair of FBM216 modules can form a master/tracker architecture, sharing terminal components and enabling seamless switching in the event of a fault to improve system availability.
HART Master Station Function
Acting as a HART field device host, it can request and receive 2 digital messages from each device per second, supporting message pass-through for universal, common and device-specific commands (burst mode not supported). Device management is realized via the Field Device Expert for HART of the Foxboro DCS.
Electrical Isolation
Each channel features independent power supply and signal isolation, with strong anti-interference capability to ensure the accuracy of signal acquisition and system stability.
Technical Specifications
Signal Input
4-20mA DC current; HART FSK digital signal (superimposed on 4-20mA).
Accuracy & Resolution
Analog accuracy of ±0.075% of full scale (including non-linearity), 15-bit resolution, and temperature coefficient of 50ppm/°C.
Update & Response
100ms channel update rate, minimum 500ms ECB block cycle, 1200 baud HART communication rate, operating in half-duplex asynchronous master-slave mode.
Communication Distance
Compliant with HART physical layer specifications, with a maximum distance of 3030 meters (10,000 feet).
Electrical Parameters
Nominal sense resistance of 61.9Ω, minimum total input resistance of 280Ω, and minimum compliant voltage of 18Vdc at the field device end (at 20.5mA).
Anti-Interference Capability
Common mode rejection ratio (CMRR) ＞100dB (50/60Hz), normal mode rejection ratio (NMRR) ＞35dB (50/60Hz).
Redundancy Mechanism & Working Principle
Module Redundancy
The master module processes field signals and communicates with the controller, while the tracker synchronizes data in real time; in the event of a master module fault, the tracker automatically takes over with bumpless switching.
Terminal Sharing
Redundant modules share the same terminal assembly, requiring only a single field wiring for input, which simplifies engineering design and maintenance.
Fault Diagnosis
Supports online status monitoring and fault alarm, enabling quick localization of module or channel faults via the DCS system to reduce maintenance time.
Communication & Protocol Support
Protocol Version
Compatible with HART Protocol v6, supporting mainstream HART field devices.
Command Support
Realizes HART universal commands (e.g., reading device ID), common commands (e.g., reading process variables) and device-specific commands via message pass-through, meeting the requirements of device parameter configuration, diagnosis and data acquisition.
Data Interaction
Transmits 2 digital messages per second, balancing real-time performance and communication efficiency, and adapting to the high-frequency data acquisition requirements for field devices in industrial process control.
Installation and Application
Installation Compatibility
It is compatible with the standard racks of the Foxboro I/A series DCS and supports hot-swapping, facilitating system expansion and maintenance.
Typical Application Scenarios
Widely used in process industries such as petrochemicals, power generation and metallurgy for the high-precision acquisition of parameters including pressure, temperature and flow. It is compatible with HART intelligent devices like control valves and transmitters, as well as traditional 4-20mA instruments, making it suitable for hybrid scenarios with both legacy and new systems.
Maintenance Advantages
The independent channel isolation design ensures that a single channel fault will not affect other channels, reducing system failure risks and simplifying fault troubleshooting.
Ordering and Compliance Information
Model Identification
FBM216 is the module model, and P0917TN is the specific order part number, corresponding to the standard redundant HART input configuration.
Compliance Certifications
The module complies with industrial electromagnetic compatibility (EMC) and safety standards, and is adapted to the wide temperature and vibration resistance requirements of industrial environments.
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