Product Overview

• Part Number: FI820F, full code 3BDH000031R1
• Brand: ABB, Origin: Sweden
• Matching System: Freelance AC800F DCS distributed control system
• Type: Dual-channel serial fieldbus communication module

• FunctionExpand serial communication ports for AC800F controllers. Realize data interaction between DCS and field Modbus devices including transmitters, inverters, flow meters, pressure instruments. Convert internal control bus signals to standard serial signals for data collection, remote parameter modification and equipment interlock control.

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Core Features

• Two independent DB9 serial ports, each configurable as RS232/RS485, half-duplex/full-duplex adjustable
• Supports Modbus RTU master/slave, baud rate max 192kbps; one bus connects up to 32 field devices
• 2500V AC channel isolation, anti-surge and anti-electromagnetic interference for power plants and chemical workshops
• PCB conformal coating, wide temperature adaption; DIN rail plug-in installation, hot swappable
• Front LED indicators for power, channel run and communication fault for quick troubleshooting

• Configured via Control Builder M programming software

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Technical Specifications

• Power Supply: DC 24V, power consumption 2.5W
• Operating Temperature: -40℃ ~ +70℃
• Storage Temperature: -40℃ ~ +85℃
• Humidity: 0~95%RH, non-condensing
• Dimension: 125×155×28mm
• Net Weight: 0.145kg
• Protection Grade: IP20 (cabinet installation only)
• HS Code: 85389091

• Supply: New original, tested refurbished available

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Compatibility

• Exclusive match: ABB Freelance AC800F controller rack
• Connectable devices: Modbus inverters, temperature/pressure transmitters, PLC, intelligent valves

• Direct replacement for all batches of FI820F / 3BDH000031R1

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Application

• Communication fault replacement when DCS fails to read serial instrument data
• Modbus device access expansion for boiler, water treatment, chemical pipeline control cabinets
• Retrofitting serial communication on legacy Freelance DCS systems
• Spare backup for factory process automation communication racks