The Exsys USB 2.0 To Serial RS 232 comes in a metal case providing four serial RS232 high performance UART 16C550 outputs. It is designed to add four more serial outputs in a rugged metal enclosure for desktop computer or notebook via USB 2.0 bus. It has LED indicators for data transmission on each port and comes with two brackets for wall mounting and a DIN Rail kit for mounting on a carrier rail in a 19 inch rack. A terminal block and DC jack are available for optional power supply.

I/O addresses and interrupt are assigned by the operating system
Terminal block 9 to 48VDC and DC socket for optional power supply
Power from the USB bus