Add an R422/485 serial port to your laptop or desktop computer through USB - USB to Serial - usb to rs485 - USB to DB9 - usb to rs422 - USB to serial Adapter
Add RS232, RS422 and RS485 support to your laptop or desktop computer via USB - USB to RS232 RS422 RS485 - USB to Serial - USB to DB9 - USB to serial Adapter - USB to serial port
Add two RS422/485 serial ports through a standard or low profile PCI expansion slot - pci serial card - rs422 serial card - rs485 serial card - dual port serial card - 2 port rs422 pci card
Convert a USB port into 8 RS232 serial ports in an industrial rack-mountable chassis, and daisy chain multiple hubs for a scalable solution - 8-Port USB-to-Serial Adapter Hub - USB to RS232 port...
Industrial 8 port serial hub 15kV Level 4 ESD - IP30 rating Metal USB to serial adapter converter w/ each DB9 port set to RS232/RS422/RS485(2wire/4wire) baud rates up to 921.6Kbps - Desk/wall/DIN...