Foxboro FBM216B Product Description
The Foxboro FBM216B (part number P0927AJ) is a high-performance, redundant 8-channel HART analog input module in the Compact 200 Series I/O portfolio, manufactured by Foxboro (Schneider Electric) for Foxboro I/A Series and Foxboro Evo™ distributed control systems (DCS). It serves as the critical interface between the DCS and field-mounted 4–20 mA transmitters, sensors, and HART-enabled smart devices, delivering precision analog measurement with bidirectional HART communication. As an enhanced variant of the FBM216, the FBM216B builds on its predecessor’s reliability with optimized redundancy, improved signal processing, and broader environmental tolerance, making it ideal for high-availability, safety-critical process applications that demand uninterrupted data acquisition and robust diagnostics.
Description
Foxboro FBM216B Product Description
Overview
The Foxboro FBM216B (part number P0927AJ) is a high-performance, redundant 8-channel HART analog input module in the Compact 200 Series I/O portfolio, manufactured by Foxboro (Schneider Electric) for Foxboro I/A Series and Foxboro Evo™ distributed control systems (DCS). It serves as the critical interface between the DCS and field-mounted 4–20 mA transmitters, sensors, and HART-enabled smart devices, delivering precision analog measurement with bidirectional HART communication. As an enhanced variant of the FBM216, the FBM216B builds on its predecessor’s reliability with optimized redundancy, improved signal processing, and broader environmental tolerance, making it ideal for high-availability, safety-critical process applications that demand uninterrupted data acquisition and robust diagnostics.
Key Features
The FBM216B provides eight fully isolated input channels, each equipped with independent galvanic isolation from other channels, ground, and module logic, eliminating ground loops, crosstalk, and transient damage in harsh electromagnetic environments. Each channel accepts either standard 4–20 mA analog signals or HART Frequency Shift Keying (FSK) digital signals superimposed on the analog input, supporting seamless mixing of conventional analog transmitters and HART smart devices on the same module without additional accessories.
As a HART master, the module integrates a dedicated per-channel FSK modem for bidirectional communication, enabling the DCS to read real-time process variables, device diagnostics, and perform remote configuration at up to two digital messages per second per channel. It supports HART protocol versions 5, 6, and 7, including universal, common practice, and device-specific commands via telegram pass-through (burst mode not supported), compatible with the Foxboro DCS Field Device Expert for HART for streamlined configuration and monitoring.
High precision is achieved through 15-bit sigma-delta analog-to-digital conversion, with typical analog accuracy of ±0.075% of full scale (including nonlinearity) and a temperature coefficient of 50 PPM/°C. The module offers exceptional noise rejection, with common-mode rejection exceeding 100 dB at 50/60 Hz and normal-mode rejection greater than 35 dB at 50/60 Hz, ensuring stable measurements in high-noise industrial settings. Each channel includes a current-limited, voltage-regulated loop power supply with galvanic isolation, supporting both internally and externally powered field transmitters.
Redundancy is a core enhanced feature: two FBM216B modules operate in a master-tracker redundant pair, with field inputs wired to a common termination assembly. The master module actively processes data, while the tracker synchronizes in real time. If the master fails, the tracker executes a bumpless automatic switchover within milliseconds, ensuring continuous data acquisition without process disruption. The FBM216B includes enhanced redundant status monitoring and switchover event logging, enabling real-time tracking of primary/standby health and post-fault analysis.
Rugged construction includes an extruded aluminum enclosure and conformal-coated PCB, rated for ISA S71.04 Class G3 harsh environments to resist dust, moisture, vibration, and wide temperature fluctuations. Front-panel LED indicators display module power, channel activity, and fault status for quick on-site troubleshooting. Hot-swap capability allows module replacement during system operation without shutting down the DCS or interrupting process control. The maximum field wiring distance reaches 3030 m (10,000 ft) under optimal conditions, complying with HART FSK physical layer specifications.
Technical Specifications
Manufactured by Foxboro (Schneider Electric), the FBM216B is fully compatible with Foxboro I/A Series (v8.4–v8.8) and Foxboro Evo™ (v9.0+) DCS platforms. The input signal range is 4–20 mA DC, supporting analog-only or HART-superimposed signals. Communication follows the HART (FSK, 1200 baud) protocol, using point-to-point master/slave half-duplex communication with parity and CRC error checking.
Resolution is 15-bit, with analog accuracy of ±0.075% of full scale and a temperature coefficient of 50 PPM/°C. The input resistance is 280 Ω minimum, with a sense resistor of 61.9 Ω nominal. The update rate is 100 ms, with an integration time of 500 ms. Isolation is group galvanic isolation between channels and system logic, with a compliance voltage of 18 V DC minimum at 20.5 mA.
The power supply requirement is 24 V DC (18–32 V DC operating range), with redundant power support and maximum power consumption of approximately 8 W. The operating temperature ranges from –20 °C to +70 °C (–4 °F to +158 °F), with storage temperature from –40 °C to +85 °C (–40 °F to +185 °F) and 5%–95% non-condensing relative humidity. The enclosure is extruded aluminum with a conformal-coated PCB, rated IP20. Dimensions are approximately 147 mm × 51.5 mm × 115 mm (5.8 in × 2.0 in × 4.5 in), with a weight of 0.35 kg (0.77 lb). Certifications include CE, UL, CSA, and compliance with ISA S71.04 for harsh environments.
Applications
The FBM216B is widely deployed across process industries requiring reliable, high-availability analog input and HART device integration, especially in safety-critical and continuous-process applications. In chemical and petrochemical plants, it interfaces with HART-enabled pressure, temperature, and level transmitters on reactors, distillation columns, and pipelines, providing accurate process data while enabling remote diagnostics and calibration of smart sensors.
In oil and gas facilities, including refineries, offshore platforms, and gas processing stations, it monitors critical parameters such as flow, pressure, and temperature in refining processes, compressor stations, and wellhead operations, ensuring operational safety and efficiency. In power generation plants, it connects to HART transmitters for boiler, turbine, and auxiliary system monitoring, enhancing data accuracy and reducing maintenance costs via HART diagnostics.
In water and wastewater treatment plants, it interfaces with HART-enabled level, pH, and flow sensors, supporting process regulation and regulatory compliance through continuous device monitoring. In pharmaceutical and food and beverage industries, it ensures precise monitoring of critical process parameters while meeting strict regulatory requirements via HART device validation and diagnostics.
The redundant master-tracker configuration of the FBM216B is specifically used in safety-critical loops, such as emergency shutdown systems, high-pressure vessel monitoring, and offshore platform critical sensor networks, where zero data loss and uninterrupted monitoring are mandatory.
Installation & Integration
The FBM216B installs on standard DIN rails in Foxboro I/A Series or Evo™ DCS cabinets, mounting on a dedicated Compact 200 Series baseplate for power and communication with the DCS backplane. Field wiring connects to a compatible termination assembly (TA), supporting both local and remote wiring, as well as internal or external loop power for the channels. Standard industrial shielded cables are recommended for field wiring, with proper grounding to optimize signal anti-interference capability.
System configuration is performed via Foxboro DCS software and the Intelligent Field Device Configurator (IFDC), allowing users to enable/disable channels, set HART communication parameters, configure diagnostic alarms, and scale analog input ranges. For redundant operation, two FBM216B modules are paired in the DCS software, configuring master-tracker roles, switchover logic, and health monitoring parameters. The module is plug-and-play compatible with existing Foxboro systems, requiring minimal on-site setup and supporting hot-swap replacement for maintenance without system shutdown. It integrates seamlessly with other Compact 200 Series modules, including controllers, output modules, and communication cards, forming a unified, scalable process control solution.
Maintenance & Support
Routine maintenance for the FBM216B includes visual inspection of the aluminum enclosure for physical damage, dust accumulation, or loose connections, and verification of front-panel LED indicators for normal operation. Periodic testing of channel accuracy, HART communication integrity, and loop supply voltage is recommended, especially in high-vibration, corrosive, or strong electromagnetic interference environments. The conformal coating on the PCB protects against moisture and dust, reducing the need for frequent cleaning.
Faulty modules can be repaired by authorized Schneider Electric service providers, with standard repair times of 2–4 weeks and expedited options available for critical applications. The FBM216B comes with a standard 12-month warranty against manufacturing defects, with extended warranty options available to support long-term operational reliability. For redundant FBM216B pairs, additional maintenance tasks include periodic testing of master-tracker switchover functionality to ensure fault tolerance readiness。
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