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ABB FI820F Fieldbus Module 

Product Overview

The ABB FI820F is a versatile serial fieldbus module designed for industrial automation systems. As part of ABB's AC800F controller family, this module provides reliable communication capabilities between control systems and various field devices through serial interfaces .

Technical Specifications

General Parameters

• Brand: ABB

• Model: FI820F (alternative part numbers: 3BDH000031R1)

• Type: Serial fieldbus module

• Channels: 2 serial communication channels

• Supported Protocols: Modbus, Sartorius balance 

• Interface Options: RS485 (half-duplex), RS422 (full-duplex), or RS232 

• Transmission Rate: Configurable up to 38.4 KBaud 

• Electrical Isolation: All interfaces are electrically isolated 

• Dimensions: 125×155×28mm (L×H×W) 

• Weight: 0.145kg 

• Operating Temperature: -40°C to +70°C 

• Protection Rating: IP65 (some models) 

Electrical Characteristics

• Power Supply: 24VDC (typical)

• Current Consumption: Varies based on operation mode

• Isolation Voltage: 500V AC test voltage 

Key Features

1. Dual Channel Design: Features two independent serial communication channels for flexible system integration .

2. Multiple Interface Options: Supports RS485, RS422, and RS232 interfaces through different connection cables .

3. Hot-Swappable: Modules can be inserted or removed during operation without system shutdown .

4. Redundancy Support: Capable of redundant operation with a second AC800F controller .

5. Status Monitoring: Comprehensive LED indicators for each channel's transmit/receive status and module health .

6. Robust Construction: Designed for reliable operation in harsh industrial environments with wide temperature tolerance .

7. Flexible Installation: Can be installed in any slot (F1-F4) of AC800F controller, except when used with CAN modules .

Application Fields

1. Process Industries: Connection to serial devices in chemical and petrochemical plants .

2. Manufacturing Automation: Integration of production line equipment with serial interfaces .

3. Water Treatment: Monitoring and control of pumps and valves through Modbus protocol .

4. Building Automation: HVAC system integration with legacy serial devices .

5. Energy Management: Communication with smart meters and monitoring devices .

System Integration

The FI820F module is designed to work with:

• ABB AC800F controllers (PM802F or PM803F) 

• Various serial field devices supporting Modbus protocol

• Legacy industrial equipment with RS232/422/485 interfaces

Installation and Operation Notes

1. Slot Configuration: Can be installed in any slot (F1-F4) except when CAN module is present in F1 .

2. Interface Selection: Proper cable and connector must be selected based on interface type (RS232/422/485) .

3. Module Locking: Ensure module lock is in "locked" position for secure connection .

4. ESD Protection: When not in use, store module in anti-static bag .

5. Configuration: Protocol and baud rate settings must be properly configured in control software .

6. Maintenance: Regularly check connection status and LED indicators .

The structure and details of the product：

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