STARTECH.COM 2 Port USB to RS232 RS422 RS485 Serial Adapter with COM Retention

- Backwards compatible with USB 1.1 - Both ports can function simultaneously with mixed or matched communication protocols - USB-powered; No additional external power adapter required - Includes a bracket for wall mounting the USB to Serial adapter - Features rugged screw-lock USB port to ensure cords are not accidentally disconnected

From the manufacturer

Add RS232, RS422 & RS485 support to a laptop or desktop computer via USB

The ICUSB2324852 2 Port USB to RS232 RS422 RS485 Serial Adapter with COM Retention lets you connect every type of serial device to your USB-enabled computer, whether it be for RS232, RS422, or RS485 communication.

The adapter features a 9-pin (DB9) male and a 5-pin terminal block serial connector as well as dip-switch controls for easy port configuration with minimal software requirements.

The adapter also supports using 2 ports simultaneously, including with mixed protocols; for example RS-232 on port 1, and RS-485 on port 2, or a number of other combinations.

For a convenient, and clean installation in office or industrial settings, the RS232/RS422/RS485 USB Adapter is wall-mountable and fully powered via the host USB connection, providing power to the attached serial device without requiring an external power adapter.