Chapter 3, Board layout – Lanner LEC-3012 User Manual
Page 17
17
Board Layout
Chapter 3
Embedded and Industrial Computing
Connectors on LEK-AU4
SATA Port (J1)
4-pin Serial-ATA Power Connector (J2): It is for
connecting the SATA power cord.
RS-232/422/485 Serial Port(COM1~COM4, CN1)
P I N
NO.
1
2
3
4
5
6
7
8
9
10
RS-232
SIN SOUT GND
SIN SOUT GND
RS-422
TX+
TX-
RX-
RX+ GND TX+
TX-
RX-
RX+ GND
RS-485
TX+
TX-
RX-
RX+ GND TX+
TX-
RX-
RX+ GND
RS-485
D+
D-
GND
D+
D-
GND
P I N
NO.
11
12
13
14
15
16
17
18
19
20
RS-232
SIN SOUT GND
SIN SOUT GND
RS-422
TX+
TX-
RX-
RX+ GND TX+
TX-
RX-
RX+ GND
RS-485
TX+
TX-
RX-
RX+ GND TX+
TX-
RX-
RX+ GND
RS-485
D+
D-
GND
D+
D-
GND
Note: The default protocol is in RS-232. To switch
between RS-232, 422 and 485, use the BIOS menu
as shown below
1 2 3 4 5 6 7 8 9 10
COM1 COM3
11 12 13 14 15 16 17 18 19 20
COM2 COM4
LEK-AU4/6/8
7 6 5 4 3 2 1
4 3 2 1
Pin No.
Function
1
GND
2
TX+
3
TX-
4
GND
5
RX-
6
RX+
7
GND
Pin No.
Function
1
5V
2
Ground
3
Ground
4
12V