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ABB FI820F
ABB FI820F (3BDH000031R1) – Overview
The ABB FI820F is a serial fieldbus communication module used in ABB Freelance / AC 800F control systems. It enables reliable data exchange between controllers and external devices in industrial automation environments.
Key Features
- Dual-channel serial communication
- 2 independent interfaces
- Supports RS232 / RS422 / RS485
- Protocol support
- Primarily Modbus (RTU/ASCII) communication
- Can integrate with third-party devices and field systems
- Flexible baud rate
- Up to 38.4 kbit/s (typical) or higher depending on configuration
- Hot-swappable design
- Insert/remove without shutting down the system → reduces downtime
- Electrical isolation
- Protects system from interference and faults
- Redundancy support
- Works with redundant AC 800F controllers for high availability
Technical Specifications
- Part number: 3BDH000031R1
- Type: Serial fieldbus communication module
- Interfaces: 2 × serial ports (configurable)
- Communication: RS232 / RS422 / RS485
- Protocol: Modbus (master/slave)
- Power consumption: ~1.6–2.6 W
- Dimensions: approx. 125 × 155 × 28 mm
- Weight: ~0.145 kg
Typical Applications
- PLC / DCS system communication (Freelance AC 800F)
- Integration of:
- Power monitoring devices
- Drives and instruments
- Third-party PLCs or SCADA systems
- Industries:
- Oil & Gas
- Power plants
- Chemical processing
- Manufacturing
Advantages
- Easy integration into existing ABB systems
- Supports multiple serial standards (high flexibility)
- Reliable operation in harsh industrial environments
- Reduces engineering effort with standardized communication
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