Startech.Com ICUSB422IS 1 Port Serial Adapter Card

Compatible with both USB 2.0 and USB 1.1 Supports 4-wire RS422 and 2-wire RS485 applications RS422/485 Baud rate up to 921.6 Kbps Provides one RS422/485 port while powering the device through USB RS-485 mode supports Auto Transceiver Turn Around (ATTA) Optical Isolation and Surge Protection (2500 Vrms) Supports DB9 and terminal block connector