6-in-1 USB Serial Converter Module – RS232, RS485, RS422 & TTL

The 6-in-1 USB Serial Converter Module is a multifunction communication interface designed for serial communication, debugging, and data conversion between USB, RS232, RS485, RS422, and TTL devices.

Featuring electrical isolation between the USB interface and serial communication ports, the module helps protect connected equipment from electrical interference and ground potential differences.

It is suitable for industrial automation, PLC communication, microcontroller programming, serial debugging, and communication with industrial sensors and control systems.

The module is powered directly through USB and supports multiple serial interface configurations without requiring an external power supply.

Key Features

• 6-in-1 Serial Communication: Supports multiple conversion configurations involving USB, RS232, RS485, RS422, and TTL.
• Electrical Isolation: Provides isolation between USB and supported serial interfaces.
• 1kV Isolation: Designed with a stated isolation rating of 1kV.
• USB Powered: Operates directly from a computer's USB port.
• Multiple Communication Standards: Suitable for industrial and embedded serial communication.
• Serial Debugging: Useful for testing and troubleshooting communication interfaces.
• No Jumper Configuration: Designed for convenient operation without complex jumper or DIP-switch settings.
• Windows and Linux Support: Supports compatible serial communication drivers.
• Industrial Applications: Suitable for PLCs, controllers, sensors, and automation equipment.

Technical Specifications

Supported Communication Conversions

The module is designed to support the following communication configurations:

Available conversion modes and simultaneous operation depend on the module's internal configuration.

Connection Interfaces

Typical Connection Examples

1. USB to RS485 – Industrial Communication

Connect the module to a computer using a USB cable, then connect its RS485 terminals to a compatible RS485 device.

Suitable for:

• PLC Communication
• Modbus RTU Devices
• RS485 Sensors
• Industrial Energy Meters
• Automation Controllers

2. USB to RS232 – Serial Equipment

Use the DB9 connector to communicate with compatible RS232 equipment.

Suitable for:

• Industrial Controllers
• Legacy Serial Equipment
• Serial Debugging
• Communication Testing

3. USB to TTL – Microcontroller Communication

Connect the module's TTL UART interface to a compatible microcontroller.

Suitable for:

• Arduino Projects
• ESP32 UART Communication
• Embedded System Debugging
• Serial Data Monitoring

Important: Verify the TTL voltage level before connecting a 3.3V or 5V microcontroller.

Applications

• Industrial Automation
• PLC Programming and Communication
• RS485 Modbus Communication
• Serial Communication Debugging
• Industrial Sensor Integration
• Energy Meter Monitoring
• Embedded System Development
• Microcontroller Communication
• Factory Equipment Maintenance
• Serial Interface Testing

Important Notes

• Isolation: The stated 1kV isolation rating should be verified against the exact model documentation before use in electrically demanding environments.
• TTL Voltage: Confirm the supported TTL logic voltage before connecting Arduino, ESP32, or Raspberry Pi devices.
• RS232 Compatibility: RS232 voltage levels are different from TTL UART levels and should not be connected directly.
• RS485 Wiring: Connect differential communication terminals according to the connected equipment's terminal markings.
• RS422 Wiring: Verify the transmit and receive differential pairs before connection.
• USB Drivers: Driver installation may be required depending on the operating system.
• Communication Protocol: The module converts electrical interfaces; it does not automatically translate protocols such as Modbus RTU into other protocols.
• Power Supply: USB provides operating power to the converter, not necessarily to external connected devices.

Package Includes

• 1 × 6-in-1 USB Serial Converter Module