Figure 6 Com Port - Quanmax QDSP-207B User's Manual Controller


COM port
COM port with the pin definitions.
QDSP-207B User's Manual
Pin RS-232
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI / +5V*

Figure 6 COM port

Half Duplex
RS-422
RS-485
TX- DATA-
RX+ NA
TX+ DATA+
RX- NA
GND GND
NA NA
NA NA
NA NA
NA / +5V* NA / +5V*
20
Chapter 2
Full Duplex
RS-485
TX-
RX+
TX+
RX-
GND
NA
NA
NA
NA / +5V*