UGREEN serial to USB cable adapter RS-232 to USB Type-A, 2 m (model 20222)

UGREEN 20222 is a 2 m serial-to-USB cable adapter that converts RS-232 serial signals to a USB Type-A connection. It provides a direct physical link between legacy devices with DB9/RS-232 ports and modern computers or USB hubs with Type-A ports, enabling data exchange, configuration and control without requiring separate RS-232 ports on the host. The cable integrates an RS-232 connector on one end and a USB Type-A plug on the other, designed for straightforward connection and reliable serial communication at common serial settings.

Advantages

This adapter simplifies connecting industrial equipment, POS terminals, modems and older measurement instruments to contemporary PCs by translating RS-232 signalling to USB. The 2 m length offers flexibility in workplace layout while keeping a compact single-cable solution. Built around a well-known serial chipset, the cable supports common serial features such as automatic handshake and standard baud rate configuration, and is compatible with mainstream operating systems that provide the required drivers.

Suitable for

• Connecting POS devices and receipt printers with DB9/RS-232 ports to modern PCs
• Linking industrial controllers, PLCs or measurement instruments to laptops or desktops
• Using with serial modems, barcode scanners and label printers
• Configuring routers, switches or other network equipment that use serial console ports
• Data transfer and configuration for legacy devices in labs, workshops and field service

Key specifications

• Connector type (device end): RS-232 (DB9 form factor, straight male)
• Connector type (host end): USB Type-A straight male
• Cable length: 2 m
• Serial features: supports standard baud rates and automatic handshake
• Data transfer: USB 2.0 class speeds suitable for serial communication (over 1 Mbps nominal for practical use cases)
• Compatibility: supports major desktop and laptop operating systems with appropriate drivers

How to use

Plug the RS-232 connector into the serial port of the legacy device and insert the USB Type-A plug into an available USB port on the computer or hub. Install or verify the appropriate driver on the host system if it is not automatically recognized; many modern systems detect common serial-to-USB chipsets and install drivers automatically. After driver installation, configure the virtual COM port and set the required baud rate, parity, data bits and stop bits in your terminal software or device management application to match the connected device.

Usage recommendations

Use a stable USB port on the host (avoid unpowered USB hubs for critical connections), confirm driver compatibility with the host OS version, and set matching COM port parameters in your software. For industrial or long-term installations, secure the cable and avoid sharp bends or tension to ensure reliable serial communication.