C&T Solution CT-MSB01 Manual de usuario Pagina 28

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CT-MHW0X Intel 4th Gen Core Processor i7/i5/i3/Pentium/Celeron Micro-ATX IMB
28
3.4.2 COM ConnectorsCN18
RS-232/422/485 function selectable by BIOS
3.4.2.1 RS-232
Pin
Signal
Pin
Signal
1
DCD, Data Carrier Detect
6
DSR, Data Set Ready
2
RXD, Receive Data
7
RTS, Ready To Send
3
TXD, Transmit Data
8
CTS, Clear To Send
4
DTR, Data Terminal Ready
9
RI, Ring Indicator
5
GND, Ground
3.4.2.2 RS-422
Pin
Signal
Pin
Signal
1
TXD-, Transmit Data
6
NA
2
TXD+, Transmit Data
7
NA
3
RXD+, Receive Data
8
NA
4
RXD-, Receive Data
9
NA
5
NA
3.4.2.3 RS-485
Pin
Signal
Pin
Signal
1
DATA-
6
NA
2
DATA+
7
NA
3
NA
8
NA
4
NA
9
NA
5
NA
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