The FOXBORO FBM216B P0927AJ is a high-density, analog input fieldbus module, a core component within the Foxboro (a Schneider Electric company) I/A Series® Distributed Control System (DCS). This module, part of the Fieldbus Module (FBM) family, is specifically designed for the acquisition and conditioning of analog process signals from the field. Its primary function is to interface with a wide array of analog field instruments—such as 4-20 mA transmitters, thermocouples (TCs), resistance temperature detectors (RTDs), and millivolt (mV) sources—and convert these signals into high-resolution digital values for processing by the I/A Series control processors. The FBM216B variant is characterized by its specific channel count, input types, and isolation specifications, with the suffix «P0927AJ» likely indicating a particular hardware revision, firmware version, or region-specific configuration.
As a critical link in the I/A Series architecture, the FOXBORO FBM216B provides robust galvanic isolation between the sensitive control system and the harsh plant environment. It performs essential signal conditioning tasks, including filtering, linearization for different sensor types, and cold-junction compensation for thermocouples. Housed in a modular, rugged enclosure, it is designed for installation in field marshalling cabinets or control room racks. The module communicates with the host controllers via the high-speed Foxboro fieldbus, enabling deterministic and reliable data exchange. For process engineers in industries like oil & gas, petrochemicals, and power generation, the FBM216B P0927AJ represents a reliable, precise, and configurable building block for gathering critical process variable data, which forms the foundation for monitoring, control, and safety interlocking in continuous and batch processes.
Technical Specifications
Parameter Name
Parameter Value
Product Model
FOXBORO FBM216B P0927AJ
Manufacturer
Foxboro (a brand of Schneider Electric)
System Platform
Foxboro I/A Series® DCS
Product Type
Analog Input Fieldbus Module (FBM)
Number of Channels
Typically 16 single-ended or 8 differential channels (specific to FBM216B)
High resolution, typically 16-bit analog-to-digital conversion.
Accuracy
High accuracy, typically ±0.05% of reading or better for standard current/voltage inputs.
Update Rate
Configurable scan rate per channel, synchronized with the control system’s execution period.
Isolation
Channel-to-channel and channel-to-system isolation (typically 500V AC or higher).
Burnout Detection
Supported for TC and RTD inputs (upscale/downscale indication on open circuit).
Diagnostics
Comprehensive on-module diagnostics: open circuit, over-range, under-range, module health, communication status.
Fieldbus Communication
Foxboro’s proprietary high-speed fieldbus to the Control Processor (CP) or Fieldbus Communication Module (FCM).
Power Supply
Powered from the I/A Series fieldbus (typically 5V from the backplane).
Operating Temperature
0°C to 60°C (for installation within a controlled enclosure).
Housing
Modular metal housing for DIN-rail or panel mounting.
Key Features and Advantages
FOXBORO FBM216B P0927AJ is distinguished by its versatility and precision in analog signal acquisition. A key strength is its per-channel configurability, allowing a single module to interface with a diverse mix of field instruments—from simple 4-20 mA transmitters to delicate thermocouples—without requiring different hardware. This flexibility simplifies engineering, optimizes spare parts inventory, and maximizes I/O slot utilization. The module’s high-resolution analog-to-digital converter (ADC) ensures that even minute changes in the process variable are accurately captured, which is critical for tight control loops and precise trend analysis.
FBM216B
Robust isolation and intelligent diagnostics are fundamental to its reliability. Each input channel is electrically isolated, effectively breaking ground loops and shielding the DCS from common-mode voltages and transients. This is crucial for maintaining signal integrity in electrically noisy industrial environments. The module incorporates extensive self-diagnostics that monitor sensor health (detecting burnout for temperature inputs), signal validity, and internal hardware status. These diagnostics are reported in real-time to the control system, enabling predictive maintenance and rapid fault isolation, thereby minimizing unplanned downtime and reducing mean time to repair (MTTR).
Seamless integration and hot-swappable design within the I/A Series ecosystem are significant advantages. The module is designed for hot-swap replacement (when supported by the associated hardware and procedures), meaning it can be replaced without powering down the fieldbus segment, ensuring continuous process operation during maintenance. Configuration is performed intuitively within the Foxboro I/A Series engineering software (I/A Series AutoCode or Foxboro Control Software), where each channel’s signal type, range, and alarm limits are set graphically. This tight integration ensures error-free configuration and provides a unified view of all I/O health from the control room. The FOXBORO FBM216B is thus a smart, reliable, and integral component of a world-class process automation system.
Application Areas
The FOXBORO FBM216B P0927AJ is deployed across the spectrum of process industries that rely on the Foxboro I/A Series DCS for plant-wide control. Its primary application is for high-density analog signal acquisition in continuous process units.
In oil & gas refineries and petrochemical plants, it is used to gather data from thousands of points: pressures from transmitters on distillation columns and reactors, temperatures from furnace tubes and heat exchangers (via TCs/RTDs), and flow rates from various meters. Within chemical and pharmaceutical manufacturing, the module acquires signals for batch reactor control, monitoring vessel temperatures, jacket pressures, and pH or conductivity analyzer outputs.
In power generation plants (thermal, combined-cycle), it interfaces with sensors monitoring steam pressure, feedwater temperature, flue gas analysis, and critical bearing temperatures. The FBM216B‘s reliability is essential for these 24/7 operations. For pulp & paper production, it measures stock flow, steam pressure, and dryer section temperatures. In water and wastewater treatment, it monitors pump discharge pressure, tank levels, and chemical dosing rates. Essentially, in any I/A Series DCS-based facility where a large number of analog process variables need to be reliably, accurately, and safely brought into the control system, the FOXBORO FBM216B P0927AJ module performs this fundamental task.
Related Products
FOXBORO FBM series other modules (e.g., FBM217B — Analog Output, FBM242 — Digital Input): Other I/O modules in the same FBM family.
Foxboro Control Processor (CP) or Fieldbus Communication Module (FCM): The higher-level controller or communication module that the FBM216B connects to via the fieldbus.
Foxboro I/A Series Workstation (AW/AP): The engineering and operator stations that run the Foxboro software for configuration and operation.
Foxboro Power Supply (e.g., for FBM rack): The power supply unit that provides power to the FBM mounting base and modules.
Foxboro FBM Mounting Base/Chassis: The unit that physically houses and provides electrical connection for the FBM216B and other FBMs.
Foxboro Field Instruments (e.g., pressure, temperature transmitters): The field devices that provide the analog signals to the FBM216B.
Termination Assemblies/ Panels: External termination panels for field wiring that connect to the FBM via cables.
Schneider Electric EcoStruxure™ Foxboro DCS: The modern evolution of the I/A Series platform, within which legacy FBMs like the 216B may be integrated.
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