21 com1/2, 22 cn1 – Lanner LEC-2010 User Manual
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LEC-2010 Fanless Embedded System User’s Manual
38
2.2.3.21 Serial Port COM1/2 Connector (COM1, COM2)
Pin No.
Description
TYPE RS-232
RS-422
RS-485
1
Data Carrier Detect ( DCDA # )
422TX+
DATA+
2
Receive Data ( RXDA )
422TX-
DATA-
3
Transmit Data ( TXDA )
422RX+
4
Data Terminal Ready ( DTRA # )
422RX-
5
Ground ( GND )
6
Data Set Ready ( DSRA # )
7
Request To Send ( RTSA # )
8
Clear To Send ( CTSA # )
9
Ring Indicator ( RIA # )
Note: COM1:RS-232 Only; COM2:RS-232,RS422,RS485
2.2.3.22 COM3 ~ 6 Connector (CN1)
COM3
COM4
Pin No.
20
19
18
17
16
15
14
13
12
11
RS-232 RTS3#
SIN3
SOUT3
CTS3# GND
RTS4# SIN4 SOUT4
CTS4#
GND
RS-422 TX+
TX-
RX+
RX-
GND
RS-485 4-wire TX+
TX-
RX+
RX-
GND
RS-485 2-wire DATA+ DATA- NC
NC
GND
COM5
COM6
Pin No.
10
9
8
7
6
5
4
3
2
1
RS-232 RTS5#
SIN5
SOUT5 CTS5# GND RTS6# SIN6 SOUT6
CTS6#
GND
Note: Only COM3 can select RS-232/RS-422/RS-485
Pin1~5: COM6 , Pin6~10: COM5 , Pin11~15: COM4 , Pin16~20: COM3