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Key Technical Specifications
| Parameter | Specification |
| Manufacturer | FOXBORO / Invensys / Schneider Electric |
| Model / Part Number | FBM214B / RH101AB (P0927AH) |
| Input Channels | 8 isolated analog input channels supporting HART protocol |
| Input Signal Range | 4 to 20 mA DC (supports HART digital FSK overlay) |
| HART Protocol Version | HART v5, v6, and v7 compliant pass-through |
| Communication | Dual-redundant 2 MB/s Module Fieldbus (Buses A and B) |
| Resolution / Conversion | 15-bit A/D conversion |
| Accuracy | ±0.03% of full scale |
| Input Impedance | 250 Ω nominal (includes internal HART sensing resistor) |
| Channel Isolation | Galvanic isolation (channel-to-earth & channel-to-bus, 600 V AC withstand) |
| Form Factor / Mounting | Compact 200 Series enclosure / Baseplate DIN rail mount |
| Operating Voltage | 24 V DC nominal (redundant power rails from baseplate) |
| Power Dissipation | 3.2 W maximum |
| Operating Temperature | −20 to +70°C (−4 to +158°F) |
Product Introduction & Supply Chain Strategy
The FOXBORO FBM214B (RH101AB) is an 8-channel compact HART analog input module engineered for Foxboro I/A Series and EcoStruxure Distributed Control Systems (DCS). It processes conventional 4–20 mA primary variable (PV) signals while simultaneously serving as a bidirectional digital gateway for HART secondary, tertiary, and quaternary variables (SV, TV, QV) and instrument diagnostics from smart field transmitters.
As legacy Foxboro 200 Series and compact FBM hardware approach discontinuation, maintaining New Surplus FBM214B modules on-site provides an essential risk-mitigation buffer. Sourcing unused, factory-sealed inventory eliminates HART communication corruption, A/D drift, and backplane bus faults typical of worn, refurbished units—protecting critical loop monitoring and field asset management software from unexpected downtime.
Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
- Execute full Lock-Out/Tag-Out (LOTO) protocols on connected field transmitter power loops and DCS cabinet distribution breakers.
- Wear a grounded ESD wrist strap before handling the card to prevent static damage to internal HART modems and microprocessors.
- Verify target slot positioning on the compact 200 Series baseplate and inspect keying pin locations.
Stage 2: Removal
- Unlatch the top and bottom red retaining clips on the faceplate of the existing module.
- Pull the module straight out from the baseplate guide rails to ensure backplane pins are not bent or twisted.
- Inspect the baseplate connector receptacle for dust, debris, or thermal discoloration prior to inserting the new card.
Stage 3: Installation (Clone & Seat)
- Verify physical keying tabs on the New Surplus FBM214B match the physical slot keying notches on the baseplate.
- Slide the module straight along the slot tracks and press firmly until the backplane connector locks in place.
- Secure the top and bottom retaining clips to lock the card against panel vibration.
Stage 4: Power-On & Testing
- Restore 24 V DC system power to the baseplate rails.
- Monitor front-panel LEDs: confirm the operational status LED glows steady green and active communication LEDs blink.
- Check both 4–20 mA analog primary values and HART digital diagnostic pass-through on the Foxboro Control Software and Field Device Manager (FDM) workstation.
FBM214B RH101AB
FBM214B RH101AB
Firmware/Software Versions & Upgrade Notes
- Software Compatibility: Supported across Foxboro I/A Series System Software (v8.x) and EcoStruxure Control Software environments using
MAINandHARTblock definitions. - Form Factor Variant: The “B” designation in FBM214B (RH101AB) indicates the Compact form factor variant. Ensure your baseplate architecture matches compact 200 Series dimensions rather than standard full-size 200 Series housings.
- HART Pass-Through: Device Description (DD) files for smart field transmitters must be installed on the host system to enable full secondary variable monitoring and remote recalibration.
Frequently Asked Questions (FAQ)
Is this FOXBORO FBM214B RH101AB module brand new or refurbished?
This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability.
What is the key difference between the standard FBM214 and the ?
The features a compact physical footprint (“B” = Compact form factor) designed for high-density DIN-rail baseplates, while maintaining identical 8-channel HART 4–20 mA input processing functionality as the standard FBM214.
Why pay a premium for New Surplus over cheap refurbished cards online?
Refurbished HART cards often suffer from degraded internal power filtering and worn HART FSK modems due to continuous high-temperature panel operation. A single failed module can disable both primary 4–20 mA control signals and critical HART safety diagnostics, leading to unplanned trips that far exceed the price difference of buying New Surplus.
Does the supply 24 V DC power to 2-wire transmitters directly?
The acts as an analog current input receiver. Transmitter loop power is provided either through a powered Termination Assembly (TA) or via external 24 V DC field power supplies connected to the loop.
Is the hot-swappable while the baseplate is live?
Yes. Foxboro 200 Series compact modules support live insertion and removal (hot-swapping) on energized baseplates without interrupting Fieldbus communication on adjacent modules, provided proper ESD procedures are followed.
What warranty comes with this New Surplus RH101AB module?
Every New Surplus FOXBORO RH101AB module comes with a full 1-year functional replacement warranty, supported by serial verification and complete pre-shipment quality control test reports.
