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The HL-340 USB Serial Port USB to RS232 Adapter Cable is a reliable serial communication solution designed to connect modern computers and laptops with legacy RS232 devices. Featuring the dependable HL-340 chipset, this adapter converts a standard USB port into a DB9 Male Serial (COM) Port, enabling seamless communication with PLCs, CNC machines, GPS receivers, POS systems, barcode scanners, modems, microcontrollers, and industrial equipment.
The HL-340 USB Serial Port supports USB 1.1 and USB 2.0 standards and provides stable, high-speed data transfer with built-in 128-byte transmit and 512-byte receive buffers. Its plug-and-play design, durable transparent housing, and support for automatic handshake protocols make it an ideal solution for engineers, technicians, automation professionals, and electronics enthusiasts.
🔧 Key Features
- HL-340 USB Serial Port chipset for reliable USB to RS232 conversion
- Converts USB port into a standard DB9 Male Serial (COM) Port
- USB 1.1 and USB 2.0 compliant
- Built-in 128-byte transmit (TX) buffer and 512-byte receive (RX) buffer
- Supports automatic handshake protocol
- Plug-and-play installation with driver support
- Compact and durable transparent blue housing
- Designed with electromagnetic interference (EMI) protection
- Ideal for industrial, commercial, and embedded serial communication
📐 Technical Specifications
| Product Name | HL-340 USB Serial Port USB to RS232 Adapter Cable |
| Chipset | HL-340 |
| USB Interface | USB Type-A Male |
| Serial Interface | DB9 Male RS232 (COM Port) |
| USB Standard | USB 1.1 / USB 2.0 |
| Transmit Buffer | 128 Bytes |
| Receive Buffer | 512 Bytes |
| Communication Protocol | RS232 Serial Communication |
| Handshake Support | Automatic Handshake Protocol |
| Operating Systems | Windows 95, 98, 98SE, ME, 2000, XP, Vista, Windows 7 (32-bit & 64-bit), Windows 8, Windows 10, Windows 11* |
| Housing Color | Transparent Blue |
| Protection | Electromagnetic Interference (EMI) Protection |
| Applications | Industrial Automation, PLC Programming, CNC Machines, POS Systems, GPS Devices, Serial Communication |
📌 Applications
- PLC programming and industrial automation
- CNC machine communication
- Barcode scanners and POS terminals
- GPS receivers and navigation equipment
- RS232 serial modems and communication devices
- Microcontroller and embedded system development
- Laboratory and testing instruments
- LED control cards and industrial controllers
- Serial debugging and maintenance applications
💡 Why Choose This HL-340 USB Serial Port?
The HL-340 USB Serial Port offers a simple and dependable way to connect legacy RS232 equipment to modern computers that no longer include serial ports. With its reliable HL-340 chipset, fast data communication, integrated data buffers, and broad Windows compatibility, it delivers stable performance for industrial, commercial, educational, and DIY electronics projects.
📦 Package Includes
- 1 × HL-340 USB Serial Port USB to RS232 Adapter Cable
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