UGREEN USB-A 2.0 to DB9 Male Adapter Cable 1.5m CR104
Product Overview
The UGREEN CR104 USB-A to DB9 RS-232 Adapter Cable is designed to bridge modern USB interfaces with traditional serial communication systems. It features a USB-A male connector on one end and a DB9 RS-232 male connector on the other, allowing you to connect older serial devices such as POS systems, PLC controllers, barcode scanners, and routers to laptops or desktops.
With a 1.5-meter cable length, it offers flexible installation in office, workshop, or industrial environments. This adapter is designed for standard serial communication use only. It supports RS-232 protocol devices and does not function as a video or USB data cable. Ensure compatibility with your equipment before use.
Features
- USB-A to DB9 RS-232 conversion cable
- Enables connection to legacy serial devices
- 1.5-meter cable length for flexible setup
- Built-in chipset (FTDI / PL2303) for stable communication
- Supports reliable serial data transmission
- Plug and play on most modern systems
- Durable construction with shielded cable design
- Gold-plated connectors for improved signal quality
Benefits
- Connects modern computers to older RS-232 equipment
- Eliminates the need for dedicated serial ports
- Ensures stable and error-free communication
- Suitable for professional, industrial, and IT use
- Cost-effective solution for maintaining legacy systems
How to Use
- Plug the USB-A connector into your computer
- Connect the DB9 RS-232 end to your device
- Install drivers if required (automatic on many systems)
- Start communication via your software or terminal
Common Applications
- POS systems and retail equipment
- Barcode scanners and receipt printers
- Industrial PLC controllers and machinery
- Network equipment (routers, switches via console port)
- Modems, GPS devices, and diagnostic tools
Specifications
- Model: CR104 (UG-20211)
- Connector 1: USB-A 2.0 Male
- Connector 2: DB9 RS-232 Male
- Cable Length: 1.5 meters
- Data Transmission: Serial RS-232 protocol
- Chipset: FTDI / PL2303 (varies by version)
- Compatibility: Windows, macOS, Linux
- Power Supply: USB-powered (no external power required)
- Build: Shielded cable with durable casing




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