Exsys USB B Female Female to RS232, RS422, RS485 Male Interface Adapter [EX-1344HMV]; 309-598

The Exsys USB Converter provides four high performance 16C550-type UART compatible RS232, 422 or 485 serial ports. It is designed for PC, Notebooks or 19-inch rack to provide instant COM port expansion in a robust metal case through the USB 2.0 bus. With the easy installation you don't need to open the computer system. With the included USB cable A-male to B-male you can fix the connector with screw.

IO addresses and interrupt is set from the operating system

Data bits are 7 and 8

LED Display for RX and TX