The UGREEN 20222 converts a compatible computer's USB-A connection to an RS-232 DB9 male serial interface. It is designed for connecting supported serial devices that use RS-232 communication, including compatible modems and equipment with a matching DB9 connection. The adapter combines USB 2.0 connectivity with a PL2303 conversion chipset in a 2 m cable, providing a practical serial connection for supported computers and RS-232 equipment. Key Features USB to Serial: Converts USB-A computer connectivity to RS-232. DB9 Male Connector: Connects compatible RS-232 female ports. PL2303 Chipset: Manufacturer-listed USB-to-serial conversion chipset. USB 2.0: Computer-side USB-A interface. 2 m Cable: Extended connection distance for supported serial equipment. Technical Specifications Component Specification UGREEN 20222 Computer Connector USB-A 2.0 Male Serial Connector RS-232 DB9 Male Cable Length 2 m Chipset PL2303 Signal Type RS-232 serial Compatibility & Important Information Requires equipment using an RS-232 serial connection and compatible DB9 pin arrangement. RS-232 is different from TTL-level UART, RS-422 and RS-485 signaling. The cable provides a DB9 male connector, so the target serial connection must be suitable for that connector. Driver support for the PL2303 chipset depends on the operating system and chipset version. Please to review Q: Is this an RS-232 adapter or a USB extension cable? A: It is a USB-to-RS-232 serial converter, not a simple USB extension. Q: Is the DB9 connector male or female? A: DB9 male. Q: Which conversion chipset is used? A: PL2303. Q: Can it conne directly to a TTL UART device? A: No. The cable is designed for RS-232 signaling. Q: Will I need a driver? A: Driver requirements depend on the host operating system and the installed PL2303 support.
