Chapter 2
22
QBOX-2060 User’s Manual
COM 2
COM 1
COM 3
COM 4
COM Ports
Com ports with the pin definitions.
COM1 RS-232/422/485 Port 1 D-SUB 9P
Pin
RS-232
RS-422
Half Duplex
RS-485
Full Duplex
RS-485
1
DCD
TX-
DATA-
TX-
2
DSR
N/A
N/A
N/A
3
RXD
RX+
N/A
RX+
4
RTS
N/A
N/A
N/A
5
TXD
TX+
DATA+
TX+
6
CTS
N/A
N/A
N/A
7
DTR
RX-
N/A
RX-
8
+5V
+5V
+5V
+5V
9
GND
GND
GND
GND
COM2,3,4 RS-232 Port 2,3,4 D-SUB 9P
Pin
RS-232
1
DCD
2
DSR
3
RXD
4
RTS
5
TXD
6
CTS
7
DTR
8
+5V
9
GND
Figure 7 Com ports