ABB FI 820F 3BDH000031R1 Serial Fieldbus Module

Product Description

The ABB FI 820F (Product ID: 3BDH000031R1) is a high-performance, dual-channel serial fieldbus communication module built specifically for the ABB Freelance AC 800F distributed control system (DCS) platform. 

Technical Specifications

• Manufacturer: ABB

• Model Designation: FI 820F

• Product ID / Ordering Code: 3BDH000031R1

• Product Type: Serial Fieldbus Communication Module

• System Platform Compatibility: ABB Freelance AC 800F Controller Series

• Target Processor Companions: PM 802F or PM 803F Base Units

• Number of Channels: 2 independent, isolated serial communication channels

• Standard Protocol Support: MODBUS and generic serial communication routing

• Physical Hardware Interfaces: RS-485 (Half duplex), RS-422 (Full duplex), and RS-232 serial links

• Data Transmission Speed: Configurable up to 38.4 kBd (or up to 192 kbps depending on network layout)

• Electrical Safety Isolation: Integrated channel-to-system electrical isolation parameter

• Hot-Swapping Capability: Supported (Can be safely inserted or removed during active system operation)

• System Redundancy Support: Fully compatible with redundant AC 800F hardware configurations

• Rated Operating Voltage: 5 V DC (±3% derived natively from the controller backplane)

• Module Power Consumption: 1.6 W to 2.6 W maximum operational draw

• Product Net Dimensions: 28 mm (Width) x 155 mm (Height) x 125 mm (Depth)

• Product Net Weight: 0.145 kg (Approx. 0.32 lbs)

• Logistics Shipping Data: Estimated package weight of 1.0 kg to 2.0 kg depending on protective export packing

• International HS Code: 851762 (Electrical apparatus for transmission/reception of data)

• Customs Tariff Number: 85176200

• Environmental Compliance: WEEE Category 5 (Small equipment with no external dimension exceeding 50 cm); Not RoHS Compliant

Industrial Application Scenarios

The ABB FI 820F communication interface is integrated within the modular rack frames of AC 800F process controllers located inside central control room marshalling cabinets or localized field enclosures. It is heavily utilized in continuous-process industries such as chemical plants, water treatment facilities, petrochemical refineries, and power generation stations. Automation engineers deploy the FI 820F to bridge the primary DCS controller with third-party sub-systems—including gas analyzers, variable frequency drives (VFDs), smart energy meters, and legacy PLC networks. Operating over isolated RS-485 or RS-232 lines, it continuously feeds diagnostic parameters back to the HMI layer, giving operators full control over specialized field instrumentation without requiring expensive protocol converters.