KBox E-410-APL - User Guide, Rev. 1.0
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11.1.6.
DB9 Port
DB9 ports have four possibilities of pin assignments depending on ordered configuration (see Subsection 4.2.9).
RS232/422/485 (Port X1 & X2)
RS232 (Port X3 & Port X4)
CAN Bus (Port X3 & X4)
DIO (Port X4)
Table 11: RS232/422/485 Serial Port (see Figure 1, pos. 9)
Pin
RS232
RS422
RS485
Half
Duplex
RS485
Full
Duplex
COM (9-pin D-SUB Male Connector)
1
DCD
TX-
DATA-
TX-
2
RXD
TX+
DATA+
TX+
3
TXD
RX+
N/A
RX+
4
DTR
RX-
N/A
RX-
5
GND
GND
GND
GND
6
DSR
N/A
N/A
N/A
7
RTS
N/A
N/A
N/A
8
CTS
N/A
N/A
N/A
9
RI
N/A
N/A
N/A
Table 12: RS232 Serial Port (see Figure 1, pos. 9)
Pin
Signal Name
COM (9-pin D-SUB Male Connector)
1
DCD
2
RXD
3
TXD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI