4
2.3 RS-232 DB-9 Connection
Pin assignments of the RS-232 port are as follows:
Table 2 Pin assignments of the RS-232 port
RS-232 port pin no. Pin name Signal direction
1 DCD -
2 RXD Output
3 TXD Input
4 DTR Input
5 GND -
6 DSR Output
7 RTS Input
8 CTS Output
9 RI -
