C&T Solution VCO-6131E-4M2 User Manual page 22

Chapter 2: Switches and Connectors
2.3 I/O Interface Descriptions
COM1_2 , COM3_4
RS232 / RS422 / RS485 Connector Type: 9-pin D-Sub
Pin RS232 Definition
1(10)
2(11)
3(12)
4(13)
5(14)
6(15)
7(16)
8(17)
9(18)
RS422 / 485 Full Duplex
DCD#
RxD
TxD
DTR#
GND
DSR#
RTS#
CTS#
RI#
VCO-6131E-4M2 l User's Manual
RS485 Half Duplex Definition
Definition
TX-
TX+
RX+
RX-
GND
10 14
15 18
1 5
6 9
DATA-
DATA+
GND
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