User`s manual

12.3 X502: RS232 * 1
12.3.1 Specifications
For I-7188XC
Parallel I/O :
RS-232 port : 2
COM3 : TXD, RXD, RTS, CTS, GND
COM4: TXD, RXD, GND
16550 compatible
Internal FIFO : 16 bytes
Transmission speed: 115.2K BPS max.
Isolated : none
12.3.2 Pin Assignment :
(X502) COM2
12.3.3 Programming :
For Software Installation & Demo Program, Refer to Section 2.2.2
I/O Expansion Bus for 7188X/7188E User’s Manual, Jun/2004 v1.4, 7PH-000-14---96