The USB to RS485/RS232/RS422 Communication Module, equipped with the CH340 Chip, serves as a versatile and reliable instrument designed to convert USB signals into three distinct serial communication standards: RS485, RS232, and RS422. This module is extensively utilized in industrial automation, data acquisition, and communication systems, offering adaptable solutions for integrating modern USB-enabled devices with legacy serial systems.
USB to RS485/232/422(CH340 chip) communication module
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USB to RS485/232/422(CH340 chip) communication module
Key Features:
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Multi-Protocol Support (RS485/RS232/RS422):
This communication module supports RS485, RS232, and RS422 protocols, offering a broad range of compatibility with various industrial devices. You can easily switch between the communication standards depending on your specific needs, making it ideal for different applications and environments.
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CH340 Chip for Stable Performance:
The module is powered by the reliable CH340 chip, known for its excellent compatibility and performance with USB ports. It ensures stable data transmission, high-speed communication, and ease of integration with a wide range of devices, including PCs, embedded systems, and microcontrollers.
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Two-Way TVS Protection:
The two-way Transient Voltage Suppression (TVS) protection ensures that the module is shielded from voltage spikes, preventing damage from electrical surges and noise. This feature enhances the durability of the module, especially in industrial and high-noise environments.
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Versatile Application Range:
Ideal for use in industrial automation, data acquisition, communication systems, embedded systems, and PLC control, this module can connect to a wide array of devices that use serial communication standards. It is perfect for controlling machinery, gathering data from sensors, and integrating various RS485/RS232/RS422-based devices into modern systems.
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Plug-and-Play Design:
The module is designed for easy installation with plug-and-play functionality. It is compatible with Windows, Linux, and macOS, and requires no additional drivers in many cases, simplifying the setup process and minimizing the time needed for deployment.
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Durable and Industrial-Grade Construction:
With robust protection against voltage spikes and high-temperature fluctuations, this module is built to endure demanding industrial conditions, ensuring long-lasting and reliable performance in harsh environments.
Technical Specifications
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Chipset: CH340
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Communication Standards Supported: RS485, RS232, RS422
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TVS Protection: Two-way protection against voltage surges and spikes
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Operating Voltage: 5V (via USB)
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Data Transfer Rate: Up to 1 Mbps
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Connector Types: DB9, terminal block, or screw terminal (depending on model)
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Operating Temperature Range: -40°C to 85°C
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Dimensions: Compact and portable for easy integration into existing systems
Multiple Protections
TVS Transient Suppression Protection: Equipped with TVS transient suppression protection to prevent damage to internal chips caused by incompatible voltage levels.
Instant Overvoltage Protection: Provides protection against transient interferences such as lightning, electrostatic discharge, surge impact, and overvoltage caused by power system switching. Protective circuits are used to divert harmful transient energy to the ground, effectively shielding the device from potential damage due to these disturbances.
Intelligent Core for Stable Transmission
Utilizes the CH340 driver for reliable performance.
Supports USB to RS485 half-duplex communication and RS232 full-duplex communication for versatile data transmission needs.
Wiring Instructions
Connects directly to your computer's USB port.
USB to RS485
| No. | USB-A | Port Information | 485 Signal |
|---|---|---|---|
| 1 | A | 485+ | 485+ |
| 2 | B | 485- | 485- |
| 3 | GND | GND | GND |
| 4 | GND | GND | GND |
| 5 | +5V | +5V | +5V |
USB to RS485/232
USB to RS485/422
Product Size
| Model | Shell Material | Interface | Warranty |
|---|---|---|---|
| TFU485D | PVC Shell | Nickel-Plated Interface | One Year |
Applicable Products (For Reference):
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POS Machines
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Barcode Printers
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Access Control Systems
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PLCs
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Scanners
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External Modems
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CNC Machines
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PLAM
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Tax Control Machines
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LED Displays
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Temperature Control Equipment
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Tablets
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Programmable Controllers
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Industrial Control Machines
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Industrial Instruments
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Touch Screens
Applications
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Industrial Automation:
Interface with PLCs, sensors, and controllers, allowing seamless communication with legacy equipment using RS232, RS485, or RS422 standards.
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Data Acquisition:
Collect data from sensors and devices in environments like manufacturing facilities, research labs, and monitoring systems.
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Embedded Systems Integration:
Connect embedded systems or microcontrollers to RS485, RS232, or RS422 devices for real-time communication.
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Communication Networks:
Utilize the module for building or expanding communication systems in industrial, commercial, or remote environments where long-distance communication is required.
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Point-to-Point or Multi-Point Communication:
Easily connect devices for point-to-point or multi-point communication, suitable for applications ranging from factory equipment to telemetry systems.
Easy Connection
Simply plug in and install the driver to start using.
Driver Installation Steps:
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Download the driver installation package.
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Double-click the .exe file to run the installation.
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Once the installation is successful, the device is ready for use.
How to Check the USB Driver:
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Right-click "My Computer" and select "Properties."
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Click on "Device Manager."
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When the computer connects to the USB, a USB serial device (COM) will appear in the Device Manager.
Effective Date: March 27, 2025
At OpenELAB, we are committed to providing accurate product descriptions and delivering high-quality products. If you experience any issues with your purchase, please notify us within 60 days of the shipment date.
1. Warranty Disclaimer
Unless explicitly stated in a specific agreement or purchase order, OpenELAB makes no warranties—express or implied—regarding the fitness, suitability, or merchantability of any product for a particular purpose or special use.
2. Warranty Policy
Warranty Period
The standard warranty period for products sold by OpenELAB is 12 months from the date of delivery.
Under this warranty, OpenELAB will make a reasonable effort to repair or replace products free of charge if defects are due to issues with raw materials, design, or manufacturing.
If the defect qualifies under this policy but falls outside the covered scope, reasonable charges may apply for repair or replacement.
After the warranty period, support may still be available at a reasonable fee.
Warranty Exclusions
The warranty does not apply in the following cases:
- The product is beyond the 12-month warranty period.
- Damage due to misuse, improper maintenance or storage, or failure to follow the user guide or manual.
- Issues caused by Force Majeure events (e.g., natural disasters, war, legal changes, etc.).
- Unauthorized repair attempts by the customer.
- The product is not defective but has been opened and is non-returnable by policy.
3. Returns & Refunds
If you're not satisfied with your purchase, you may be eligible for a return or exchange:
- Return for Refund: Within 15 days of receipt (unopened).
- Return for Replacement: Within 30 days of receipt (damaged or defective).
- Exchange Window: Up to 30 days from receipt.
Please email us at info@openelab.io for a return authorization before sending anything back.
Return Conditions
- Items must be in original, clean, and mint condition with packaging intact.
- Returns of damaged, used, scratched, modified, or programmed items will not be accepted.
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Shipping & Fees
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