Startechcom usb to db9 rs232 serial adaptor hubs startechcom icusb2324i the startechcom icusb2324i 4 port industrial usb to serial hub with din rail clips converts a single usb port into four rs232 serial ports enabling you to connect to monitor and control your serial deviceswith rugged metal construction sturdy wall mounting brackets and top hat din rail clips included this hub provides versatile mounting options and a robust solution for both harsh industrial environments and sim