Vecom IVH-7700, User Manual

Page: 28 / 112

22 GETTING TO KNOW YOUR IVH-7700
©Vecow IVH-7700 User Manual
2.3.5 Serial Port COM 3 (CN18)/ COM 4 (CN27)
Serial
Port
Pin No. RS-232 RS-422
(5-wire)
RS-422
(9-wire)
RS-485
(3-wire)
3,4
1 DCD ----------- ----------- -----------
2 RXD ----------- ----------- -----------
3 TXD ----------- ----------- -----------
4 DTR ----------- ----------- -----------
5 GND ----------- ----------- -----------
6 DSR ----------- ----------- -----------
7 RTS ----------- ----------- -----------
8 CTS ----------- ----------- -----------
9 RI ----------- ----------- -----------
COM 3 and COM 4 support RS-232 only and provide up to 115200bps baud rate.
The pin assignments are listed in the following table:
D I PIN 1 ~ 8 DO PIN 11 ~ 18
20 11
10 1