X502 CR

I/O Exp. Board/2 RS-232/5pin/3pin

RS-232 ports : 2
COM3 : TXD, RXD, RTS, CTS, GND
COM4 : TXD, RXD, GND
16550 compatible
Internal FIFO : 16 bytes for each COM port
Transmission speed: 115.2K BPS max.
Isolated : none