USB to Isolated RS-485 Converter
1 port USB-to-Serial Hub. RS-232/422/485
4-Port Industrial USB 2.0 Hub
1 Port USB-to-Serial Adaptor. RS-232
USB to RS-422/485 (inc. mini DB9F-to-TB)
USB to 2-port RS-232/422/485 Serial Hub
USB to 4-port RS-232 Serial Hub