USB to RS232 Serial Adapter

The USB to RS232 Serial Adapter provides a simple and reliable way to connect legacy RS232 serial devices to any modern computer or laptop via a standard USB port. Built around a USB-to-UART bridge chip (typically CH340, PL2303, or equivalent), the adapter enumerates as a virtual COM port, allowing existing serial applications to communicate with connected devices without any modification. It is compatible with a wide range of serial equipment including modems, PLC controllers, CNC machines, barcode scanners, POS systems, tax printers, label writers, and industrial instrumentation. The connector carries the full RS232 signal set including TXD, RXD, RTS, CTS, DTR, DSR, DCD, RI, and GND, supporting both hardware and software flow control. Bus-powered via USB, no external supply is required. Driver installation is straightforward, with plug-and-play support on Windows 10 and 11, and driver packages available for older Windows versions, macOS, and Linux.

Specification:

• USB Interface : USB 2.0 Type-A
• Serial Connector : DB9 Male (9-pin) / DB25 Male (25-pin)
• Converter Chip : CH340 / PL2303 (may vary by batch)
• Signal Standard : EIA/TIA-232
• Baud Rate : 75 bps – 1 Mbps (programmable)
• RS232 Signals : TXD, RXD, RTS, CTS, DTR, DSR, DCD, RI, GND
• Flow Control : RTS/CTS (hardware), XON/XOFF (software)
• Data Format : 5 / 6 / 7 / 8 data bits, 1 / 2 stop bits, None / Odd / Even parity
• Power Supply : Bus-powered via USB (no external power needed)
• OS Support : Windows 7 / 8 / 10 / 11, macOS, Linux