2ch serial ports of RS-232C conformity is equipped. Setting a baudrate to 15 - 230,400bps is possible.
It attaches a usable driver library same as a COM port of PC main body in Windows. It supports Win32 API communication function by OS standard and MSComm of Visual Basic.
One PC can implement a board to 16 pieces at the maximum. By device manager, Setting it to COM1 - COM256 is possible.
It put a buffer memory of 64byte for exclusive use of the transmission, and for exclusive use of the reception on each channel.
As optionally, It prepares straight cable(1.8m), cross cable (1.8m), and 9 pin D-SUB connectors for my own cables(A male type or a female type).