Add four RS232 serial ports to any notebook or desktop computer using a single USB port - USB to Serial - USB to RS232 - USB to DB9 - USB to serial Adapter - USB to serial port
Industrial 4 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...
Add 4 DIN Rail-mountable RS232 Serial ports to any system through USB - 4 port usb serial adapter - 4 port usb to rs232 - USB to DB9 - USB to serial converter - USB to serial hub
Add eight RS232 serial ports to any notebook or desktop computer using a single USB port - USB to Serial - USB to RS232 - USB to DB9 - USB to serial Adapter - USB to serial port