ABB FI820F (3BDH000031R1) — Fieldbus Communication Module | AC800M DCI Platform
Engineering Background
The FI820F is a dedicated fieldbus interface module developed by ABB for the AC800M Distributed Control Infrastructure (DCI) platform — ABB’s flagship process automation controller family widely deployed in oil & gas, power generation, pulp & paper, and chemical industries. The module extends the AC800M controller’s communication reach by providing a serial fieldbus gateway, enabling integration with legacy field devices and instrumentation that operate on serial-based protocols.
Product Positioning
Designed for procurement engineers and system integrators who require a certified, OEM-sourced communication interface for brownfield expansions, controller upgrades, or spare-parts replenishment. The FI820F eliminates the need for third-party protocol converters by natively bridging the AC800M backplane to serial fieldbus segments — reducing latency, simplifying diagnostics, and maintaining ABB’s unified engineering environment.
Complete Technical Specifications
| Part Number | FI820F |
| ABB Order Code | 3BDH000031R1 |
| Module Type | Fieldbus Communication Interface Module |
| Platform Compatibility | ABB AC800M DCI (Distributed Control Infrastructure) |
| Communication Interface | Serial Fieldbus (RS-232 / RS-485 compatible) |
| Mounting | AC800M controller rack / DCI backplane slot |
| Power Supply | Supplied via AC800M backplane (no external PSU required) |
| Operating Temperature | 0°C to +55°C (32°F to 131°F) |
| Storage Temperature | -40°C to +70°C |
| Relative Humidity | 5% to 95% non-condensing |
| Weight | 160 g |
| Certifications | CE, cULus (verify current certificate with ABB) |
| Firmware | Managed via ABB Control Builder M engineering tool |
| RoHS Compliance | Yes |
Proven Application Environments
- Oil & Gas: Upstream wellhead RTU integration and downstream refinery DCS expansions using AC800M as the primary controller.
- Power Generation: Turbine control systems and balance-of-plant automation where serial HART or Modbus RTU devices require DCS connectivity.
- Pulp & Paper: Brownfield mill upgrades retaining existing serial instrumentation while migrating to AC800M-based control architecture.
- Chemical & Petrochemical: Reactor and distillation column control loops requiring high-reliability serial communication with field transmitters.
- Water & Wastewater: SCADA-integrated pump station control with legacy serial sensor networks.
Engineering Advantages
- Native DCI Integration: Plugs directly into the AC800M backplane — no external gateway hardware, no additional wiring complexity.
- Unified Engineering: Fully configured within ABB Control Builder M, maintaining a single engineering environment for the entire control system.
- Deterministic Communication: Serial fieldbus timing is managed by the AC800M CPU cycle, ensuring deterministic scan rates critical for process control loops.
- Backward Compatibility: Enables retention of proven serial field devices during controller platform migrations, protecting existing instrumentation investment.
- Hot-Swap Capable: Supports module replacement without full system shutdown (subject to AC800M firmware version — verify with ABB documentation).
- Compact Form Factor: Standard DCI module footprint at 160 g — minimal rack space consumption.
System Architecture & Signal Flow
The FI820F occupies a dedicated slot in the AC800M DCI rack. Field devices connected via serial fieldbus communicate upstream through the FI820F module to the AC800M CPU module (e.g., PM866, PM891). The CPU processes fieldbus data within its standard scan cycle and exposes process variables to the ABB 800xA System or other SCADA/HMI layers via the AC800M’s Ethernet-based supervisory interface.
Typical Signal Path:
Field Device (Serial) → FI820F → AC800M Backplane → CPU Module → 800xA / SCADA
This architecture eliminates protocol conversion latency introduced by standalone gateways and ensures that fieldbus diagnostics (device status, communication errors) are natively visible within the ABB engineering and operations environment.
Sourcing & Quality Verification
- Origin: OEM ABB production — not aftermarket or remanufactured.
- Inspection: Each unit undergoes visual inspection and functional verification prior to dispatch.
- Traceability: Part number (FI820F) and ABB order code (3BDH000031R1) are verified against physical label before shipment.
- Packaging: Ships in anti-static protective packaging with original ABB labeling where available.
- Warranty: 12-month warranty against manufacturing defects. Contact support@konmask.com for warranty claims.
Procurement Process
- Confirm Compatibility: Verify your AC800M DCI rack version and firmware revision support the FI820F. Refer to ABB document 3BSE036351 (AC800M Hardware Manual).
- Request Quote: Contact support@konmask.com with your required quantity and delivery timeline for volume pricing.
- Place Order: Add to cart and complete checkout, or submit a purchase order via email for B2B net-terms arrangements.
- Shipping: Standard lead time 1–3 business days from Hong Kong warehouse. Express DHL/FedEx available. International shipping to 50+ countries.
- Documentation: Commercial invoice, packing list, and certificate of conformance provided with every shipment.
Technical FAQ
Q: Is the FI820F compatible with AC800M PM866 and PM891 CPU modules?
A: Yes. The FI820F is designed for the AC800M DCI platform and is compatible with the PM866 and PM891 CPU families. Confirm firmware compatibility with ABB Control Builder M release notes for your specific firmware version.
Q: What serial protocols does the FI820F support?
A: The FI820F supports serial fieldbus communication as defined by ABB’s DCI architecture. Specific protocol support (Modbus RTU, HART, proprietary ABB serial) depends on the firmware configuration applied via Control Builder M. Consult ABB product documentation 3BDH000031 for the full protocol matrix.
Q: Can the FI820F be used in SIL-rated safety loops?
A: The FI820F is a standard (non-safety) communication module. For SIL-rated applications, ABB’s S800 I/O with dedicated safety modules and the AC800M HI (High Integrity) platform should be specified.
Q: What is the maximum cable length for the serial fieldbus segment?
A: Maximum cable length depends on the serial standard (RS-485 supports up to 1200 m at lower baud rates). Refer to ABB installation guidelines and your site’s EMC requirements for final cable specification.
Q: Do you provide a test report or functional verification certificate?
A: Yes. A functional verification record is available upon request. Contact support@konmask.com before placing your order to arrange documentation requirements.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
