Product Overview

The Yokogawa F3LR02-0N is a Fiber Optic FA Bus Interface Module designed for the FA-M3 PLC system. It is used to build high-speed, long-distance, and noise-immune distributed I/O networks by connecting the PLC main unit to multiple remote I/O sub-units via fiber-optic FA Bus Type 2 communication.

Compared with the F3LR01 series, this model supports a larger network scale and extended communication distance, making it suitable for large industrial automation systems.

Technical Specifications

Function and Working Principle

The F3LR02-0N acts as a high-speed optical communication bridge between the FA-M3 CPU and distributed I/O sub-units.

Working Principle

1. FA-M3 CPU exchanges I/O data with the FA Bus master module
2. Electrical signals are converted into optical signals
3. Data is transmitted over fiber optic cable at 10 Mbps
4. Remote sub-units receive and execute I/O updates
5. Feedback is continuously returned to the CPU for real-time control

CPUFA−M3↔Remote I/O  (Fiber FA Bus Type 2)CPU_{FA-M3} \leftrightarrow Remote\,I/O \; (Fiber\,FA\,Bus\,Type\,2)CPUFA−M3​↔RemoteI/O(FiberFABusType2)

Key Functions

• Enables large-scale distributed I/O architecture
• Supports up to 32 remote sub-stations per system
• High-speed 10 Mbps deterministic communication
• Fiber-optic transmission eliminates electromagnetic interference (EMI)
• Supports flexible topologies: star, loop, or daisy chain
• Real-time I/O refresh for stable control systems
• Built-in RAS diagnostics for fault detection and safety shutdown

System Role

The module serves as the core communication backbone for distributed control systems:

FA-M3 CPU → F3LR02-0N → Fiber FA Bus → Multiple Remote I/O Sub-Units

It is typically used in:

• Large factory automation systems
• Multi-zone process control systems
• High-noise industrial environments
• Modular PLC expansion architectures
• Remote I/O intensive applications

Industrial Applications

• Automotive production lines
• Semiconductor manufacturing systems
• Chemical and petrochemical plants
• Power generation facilities
• Packaging and assembly systems
• Heavy industrial machinery control
• Cleanroom automation systems

Installation Guidelines

• Install in FA-M3 main rack system
• Use compatible 2-core H-PCF fiber optic cable
• Maintain maximum 500 m between stations
• Keep total system length within 1.4 km
• Ensure correct system addressing and configuration
• Avoid excessive fiber bending (follow minimum radius specs)
• Verify proper termination and topology setup

Compatible Systems

• Yokogawa FA-M3 PLC CPUs
• FA-M3 remote I/O sub-units
• Fiber FA Bus Type 2 modules and accessories
• Distributed industrial automation systems

Key Advantages

• High immunity to electrical noise (fiber optic transmission)
• Supports large-scale distributed I/O networks (up to 32 stations)
• Long-distance communication (up to 1.4 km total)
• Flexible network topology options
• Built-in fault detection and safety shutdown (RAS)
• Reliable deterministic 10 Mbps communication
• Reduces wiring complexity in large systems

Technical FAQs

Q1: What is the main function of the F3LR02-0N?
It connects FA-M3 PLC systems to distributed remote I/O units using fiber-optic FA Bus Type 2 communication.

Q2: How many stations does it support?
Up to 32 remote sub-stations per system.

Q3: What is the maximum communication distance?
Up to 1.4 km total system length, with 500 m between stations.

Q4: Why use fiber optic communication?
To eliminate electromagnetic interference and improve reliability in harsh industrial environments.

Conclusion

The Yokogawa F3LR02-0N Fiber Optic FA Bus Interface Module is a high-performance distributed I/O communication module for FA-M3 PLC systems. With support for large-scale networking, long-distance transmission, and strong EMI immunity, it is ideal for complex industrial automation systems requiring reliable real-time control.