By Bestbuy.com

Coolgear - USB to TTL / CMOS Serial Adapter - RS-232 - Isolated - Terminal Block Connectors - Bus Powered - Black

The USB-2323TTLMOS-IS is a flexible USB to RS-232 TTL/CMOS adapter that eliminates voltage guesswork by offering selectable logic levels - 1.8V, 2.5V, 3.3V, or 5V - via an easy-access DIP switch. Designed with electrical safety in mind, it features 2,500Vrms isolation across TXD, RXD, and GND lines, making it ideal for sensitive embedded systems and lab environments. Features a 5-pin terminal block connector and supports data rates up to 921.6Kbps. Powered via USB, this adapter requires no external power and works seamlessly with Windows 7 through 11, macOS, and Linux.