F3LC31-2F Modbus Module | Yokogawa PLC Communication Interface

Yokogawa F3LC31-2F Modbus Interface Module – Product Description

Overview

The Yokogawa F3LC31-2F is a high-performance Modbus interface module designed for FA‑M3 programmable logic controllers (PLCs). It enables reliable communication between Yokogawa PLCs and Modbus-enabled devices, including drives, sensors, and controllers. Moreover, its compact design with dual communication ports and optical isolation ensures stable operation even in harsh industrial environments.

Technical Specifications

Communication

• Supported Protocols: Modbus RTU, Modbus ASCII

• Ports: 2 serial communication ports (RS‑232C / RS‑485 selectable)

• Transmission Speed: 1.2 kbps to 115.2 kbps

• Operating Modes: Master and Slave supported

• Data Format: 7 or 8 data bits, parity options (even/odd/none)

• Isolation: Optical between communication ports and system bus

Electrical

• Power Supply: 5 V DC from FA‑M3 backplane

• Power Consumption:3 W

Diagnostics

• Indicators: Communication status LEDs for each port

• Error Handling: Built-in error log and advanced fault detection

Mechanical

• Dimensions (W × H × D): 28.9 × 100 × 83.2 mm

• Weight: 0.13 kg

• Mounting: Rack-mounted in FA‑M3 PLC chassis

Environmental & Compliance

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: −20 °C to +70 °C

• Relative Humidity: 5–95% non-condensing

• Certifications: CE compliant

• Origin: Japan

FAQ

Q1: Which Modbus protocols does the F3LC31-2F support?
It supports both Modbus RTU and Modbus ASCII communication protocols.

Q2: How many communication ports are available?
The module provides 2 serial ports with RS‑232C/RS‑485 selectable configuration.

Q3: Can it operate in master and slave modes?
Yes, the module supports both master and slave operating modes.

Q4: Is it suitable for harsh industrial environments?
Yes, optical isolation and CE compliance ensure reliable performance in industrial conditions.

Q5: Which PLC series is it compatible with?
It is designed for seamless integration with Yokogawa FA‑M3 PLC systems.