RH927AH Foxboro 8-Channel 4-20mA Isolated Input Module
Manufacturer: Foxboro
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Part Number: RH927AH
Condition：New with Original Package
Product Type: HART Input Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Overview
The Foxboro FBM214B RH927AH functions as a high-performance, 8-channel analog input interface for the Foxboro Evo™ and I/A Series Distributed Control Systems (DCS). This module accepts standard 4–20 mA signals while simultaneously processing HART® digital data from smart field instruments. It serves as a HART host, allowing the DCS to perform remote configuration, calibration, and real-time health monitoring of field devices. We supply this module as 100% brand new and original, ensuring immediate integration into mission-critical control loops in oil and gas, power generation, and chemical processing facilities.
Technical Specifications
| Parameter | Specification Details |
| Model Number | FBM214B RH927AH |
| Module Type | HART Communication Input Module |
| Channel Count | 8 Individually Isolated Channels |
| Input Signal | 4–20 mA Analog + HART Digital |
| System Support | Foxboro Evo / I/A Series DCS |
| Input Voltage | 24 VDC (Redundant Supply Supported) |
| Power Consumption | 8.5 W |
| Operating Temp | 0 deg C to +60 deg C |
| Isolation | Channel-to-channel and Channel-to-bus isolation |
| Dimensions | 2.2 cm x 12.4 cm x 12.6 cm |
| Weight | 0.3 kg |
Engineering Advantages
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Individual Channel Isolation: The RH927AH provides dedicated isolation for each of its 8 channels. This architecture prevents ground loops and ensures that a single field device failure or electrical fault does not propagate to adjacent channels or the system backplane.
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Dual-Signal Processing: This module overlays digital HART communication onto the traditional 4–20 mA analog signal. It enables maintenance teams to extract secondary variables and diagnostic data without disrupting the primary process control loop.
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Advanced Fail-Safe Logic: Engineers can configure each channel to either "Hold Last Value" or "Return to Preset Value" upon communication loss. This flexibility allows for customized safety responses based on the specific requirements of the industrial process.
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Smart Device Management: The RH927AH supports universal and device-specific HART commands. This allows the centralized DCS to perform asset management tasks, such as tracking valve wear or transmitter calibration drift, significantly reducing manual field inspections.
FAQs
Q: Does the FBM214B RH927AH support HART burst mode?
A: No, this module supports universal, common practice, and device-specific HART commands, but it does not support HART burst mode.
Q: Is this module compatible with my existing I/A Series rack?
A: Yes, the FBM214B RH927AH maintains full compatibility with both legacy Foxboro I/A Series and the modern Foxboro Evo™ hardware platforms.
Q: How does the module handle power failure?
A: The RH927AH supports a redundant 24 VDC power supply. If the primary power source fails, the module seamlessly switches to the redundant feed to maintain uninterrupted operation.
Q: Are these units refurbished or new?
A: We provide the RH927AH as a 100% brand new, original factory unit. Each module undergoes strict quality assurance to meet original manufacturer performance specifications.