User`s guide

Chapter 2
24
QBOX-1600 User’s Manual
 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 RS-232/422/485 Port 2 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
Figure 7 Com ports
COM 2 COM 1