Product Overview

The Yokogawa F3RS41-0N is a serial communication module designed for the FA-M3 PLC system. It provides a reliable interface for RS-422 / RS-485 communication, enabling data exchange between the PLC and external devices such as HMI panels, sensors, controllers, barcode readers, and third-party industrial equipment.

It is mainly used in point-to-point or multi-drop serial communication networks, especially where stable long-distance communication and legacy system integration are required.

Technical Specifications

Function and Working Principle

The F3RS41-0N enables serial data communication between the FA-M3 PLC and external industrial devices.

Working Principle

1. PLC CPU generates communication data
2. F3RS41-0N converts internal PLC signals into RS-422/RS-485 format
3. Data is transmitted over serial lines to external devices
4. Remote devices respond and send data back
5. PLC processes received data for control or monitoring

PLCFA−M3→RS-422\/RS-485→External Device NetworkPLC_{FA-M3} \rightarrow RS\text{-}422\/RS\text{-}485 \rightarrow External\,Device\,NetworkPLCFA−M3​→RS–422\/RS–485→ExternalDeviceNetwork

Key Functions

• Enables serial communication (RS-422 / RS-485)
• Supports multi-drop network configuration
• Connects PLC to HMI, sensors, and third-party devices
• Stable long-distance communication (industrial environments)
• Supports ASCII and binary data formats
• Allows custom protocol implementation via PLC program
• Provides reliable integration with legacy systems

System Role

The module acts as a communication gateway between PLC and external devices:

FA-M3 CPU → F3RS41-0N → Serial Network (RS-422/RS-485) → Field Devices

It is typically used in:

• Legacy industrial communication systems
• Factory automation with HMI integration
• Data acquisition systems
• Multi-device serial networks
• Process monitoring applications

Industrial Applications

• Manufacturing automation lines
• Packaging and labeling machines
• Process control systems
• SCADA and HMI integration
• Weighing and measurement systems
• Barcode scanning and tracking systems
• Industrial sensor networks

Installation Guidelines

• Install in FA-M3 I/O slot
• Use shielded twisted-pair cables for RS-485 networks
• Ensure correct termination resistors for multi-drop systems
• Maintain proper grounding to reduce noise interference
• Configure communication parameters (baud rate, parity, etc.) in PLC software
• Limit cable length according to RS-485 standards
• Avoid routing near high-power cables

Compatible Systems

• Yokogawa FA-M3 PLC CPUs
• HMI panels and operator terminals
• Industrial sensors and controllers
• Barcode readers and printers
• SCADA systems
• Third-party RS-422/RS-485 devices

Key Advantages

• Reliable industrial serial communication
• Supports RS-422 and RS-485 standards
• Enables multi-device network configuration
• Strong noise immunity in harsh environments
• Flexible protocol implementation via PLC programming
• Compact and lightweight design (0.14 kg)
• Ideal for legacy system integration

Technical FAQs

Q1: What is the main function of the F3RS41-0N?
It enables RS-422/RS-485 serial communication between FA-M3 PLCs and external devices.

Q2: How many ports does it have?
It has one serial communication port.

Q3: What is the maximum communication speed?
Up to 19,200 bps.

Q4: What is it used for?
It is used for connecting PLCs to HMIs, sensors, and industrial serial devices.

Conclusion

The Yokogawa F3RS41-0N Communication Module is a reliable serial interface solution for FA-M3 PLC systems. With support for RS-422/RS-485 communication and flexible integration capabilities, it is ideal for industrial environments requiring stable data exchange and legacy system connectivity.