Its core function is to provide flexible serial communication capability for AC 800F controllers. It supports multiple serial protocols and physical interfaces, allowing easy connection to a wide range of serial devices (such as third-party instruments, sensors, and actuators). Moreover, it can work with redundant AC 800F controllers to achieve high-availability operation.Fully integrated into the Freelance Engineering Tool, this module requires no external configuration software. Parameter setting, diagnostics, and maintenance can all be directly completed via the engineering platform. It is widely applicable to automation scenarios requiring serial communication in the process industry, such as equipment data exchange and control in the chemical, petroleum, and electric power sectors.
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Technical Parameters
Communication ParametersSupported protocols include MODBUS ASCII (master/slave mode) and MODBUS RTU (master/slave mode). The transmission rate ranges from 1200 bps to 38400 bps, configurable via the Freelance Engineering Tool. The maximum communication distance reaches 1000 m with shielded cables and 600 m with unshielded cables for RS485/RS422 interfaces; for the RS232 interface, the maximum communication distance is 15 m. Data bits (7/8 bits) and stop bits (1/2 bits) are configurable, supporting even parity, odd parity or no parity.
Application Scenarios
With its flexible serial communication capability, the FI820F module is mainly applied in the following scenarios:
Third-party Device Integration: It connects MODBUS-compliant intelligent instruments (e.g., flowmeters, pressure transmitters) and PLCs (e.g., serial interfaces of compact PLCs) to enable data acquisition and control command delivery.
Remote Device Monitoring: It links distributed on-site devices (e.g., remote I/O modules, valve positioners) via the RS485 bus, reducing wiring costs and making it suitable for the decentralized layout of large-scale plants.
Commissioning & Maintenance: It connects portable commissioning devices (e.g., laptops) through the RS232 interface, allowing local modification of module parameters and fault diagnosis.
Redundant Communication Guarantee: In critical processes (e.g., chemical reactor control, power plant boiler monitoring), it works with redundant AC 800F controllers to ensure uninterrupted serial communication and enhance system reliability.
Functions & Features
Multi-protocol & Multi-interface Support
RS485 (Half-duplex): Suitable for multi-device networking, supporting long-distance communication (up to 1000 meters with shielded cables).
RS422 (Full-duplex): Ideal for point-to-point high-speed data transmission, enabling simultaneous two-way communication.
RS232: Used for short-distance point-to-point connections (e.g., communication with local instruments and commissioning devices).
Electrical Isolation & Redundancy Design
It supports operation with redundant AC 800F controllers. When the master controller fails, the standby controller can seamlessly take over serial communication tasks to ensure uninterrupted data transmission, meeting the requirements of high-availability scenarios (such as critical process control).
Hot Swap & Online Maintenance
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