8-Channel Isolated Input Module | Foxboro RH927AH FBM214

2026-04-13T11:01:52+08:00

Vendor: Foxboro
Type: HART Input Modules
Price: 190.00

Product Overview

The Foxboro FBM214 (Part Number: RH927AH) serves as a high-precision 8-channel analog input interface for Foxboro I/A Series and Evo™ distributed control systems. It integrates standard 4–20 mA process variable acquisition with advanced HART® digital communication. This module enables operators to extract secondary variables and predictive diagnostic data from intelligent field instruments without disrupting the primary control signal. We supply this unit as 100% Brand New and Original, ensuring high-availability performance for critical asset management and industrial monitoring.

Technical Specifications

Feature | Specification Details
Manufacturer | Foxboro (Schneider Electric)
Model / Part Number | FBM214 / RH927AH
Number of Channels | 8 Individually Isolated Channels
Input Signal | 4–20 mA DC + HART Digital (FSK)
A/D Conversion | 15-bit Sigma-Delta ADC
Accuracy | ±0.03% to ±0.05% of Full Scale
Input Resistance | 250 Ω (Typical)
Isolation | Full Galvanic Channel-to-Channel Isolation
Power Consumption | 2.5 W to 8.5 W (Load Dependent)
Update Rate | 100 ms per channel
Environmental Rating | ISA Class G3 (Harsh Environment)

Engineering Advantages

Individual Channel Isolation: The FBM214 RH927AH features full galvanic isolation for each of its 8 channels. This architecture eliminates ground loop interference and prevents a single field fault from propagating across the module, maintaining total signal integrity for the remaining inputs.

HART Host Functionality: This module acts as a HART host, allowing bi-directional communication with intelligent transmitters. It retrieves device-specific parameters, such as sensor calibration and health status, which supports proactive predictive maintenance strategies and reduces unplanned downtime.

Precision Signal Processing: Utilizing high-resolution 15-bit Sigma-delta ADCs, the module delivers an accuracy of up to ±0.03%. This level of precision is vital for custody transfer, chemical dosing, and other high-accuracy process requirements.

Redundancy & High Availability: The RH927AH supports redundant module configurations. If the primary module fails, the redundant partner takes over immediately via the proprietary Foxboro Fieldbus, ensuring the control loop remains active and the process stays online.

Ruggedized for Harsh Sectors: Every unit meets ISA Class G3 standards for environmental hardening. The module resists corrosion from airborne contaminants and moisture, making it ideal for offshore platforms, wastewater facilities, and chemical refineries.

FAQs

Does the FBM214 RH927AH support HART secondary variables?

Yes. The module retrieves and processes secondary, tertiary, and quaternary variables from HART-enabled devices. It maps this digital data into DCS-usable parameters for advanced monitoring and control logic.

How does the module handle a field-side power failure?

The FBM214 offers configurable fail-safe options. You can program each channel to "hold last value" or transition to a predefined fallback value (e.g., 3.8 mA or 21 mA) to alert the system of a field instrument fault.

Is this module compatible with both I/A Series and Evo™ platforms?

Absolutely. The FBM214 RH927AH integrates seamlessly with both legacy Foxboro I/A Series hardware and the modern EcoStruxure Foxboro DCS (Evo™) architecture.

Can I perform device configuration through this module?

Yes. Through the HART host capability, the FBM214 facilitates remote device configuration and calibration using integrated asset management software, eliminating the need for technicians to use handheld communicators in the field.