Figure 6 Com Ports - Quanmax QBOX-2080 Series User Manual

COM ports
COM ports with the pin definitions.
COM 1
QBOX-2080 Series User's Manual
COM3
COM 2
COM1~2 RS-232 / 422 / 485 Port DB-9
Pin RS-232
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 +5V
COM3~4 RS-232 Port DB-9

Figure 6 COM ports

COM4
Half Duplex
RS-422
RS-485
TX- DATA-
TX+ DATA+
RX+ N/A
RX- N/A
GND GND
N/A N/A
N/A N/A
N/A N/A
+5V +5V
Pin RS-232
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 +5V
18
Chapter 2
Full Duplex
RS-485
TX-
TX+
RX+
RX-
GND
N/A
N/A
N/A
+5V