Lanner LEC-2220 - Manual (Page 15)

15
Board Layout
Chapter 3
Embedded and Industrial Computing
RS-232/422/485 Serial Port(COM2, CN16): It is a RS-
232/422/485 port through the D-SUB9 connector.
SW2, SW3, and SW4: Select COM2 Protocol Setting
RS-232
RS-422
RS-485
Switch
Protocol
SW2 SW3 SW4
RS-232
1
2
3
4
ON
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
RS-422
1
2
3
4
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
RS-485
1
2
3
4
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
Jumper Settings
Serial-ATA Connector (J6): It is for connecting a 2.5’’
harddisk to be served as your system’s storage. It can
support SATA II which features Data transfer rates up to
3.0 Gb/s (300 MB/s).
4-pin Serial-ATA Power Connector (J8): It is for
connecting the SATA power cord.
RS-232 Serial Port(COM1, CN15): It is a RS-232 port
through the D-SUB9 connector.
6 7 8 9
1 2 3 4 5
Pin No. Pin Name Pin No. Pin Name
1 dCd 6 dsR
2 RXd 7 RTs
3 TXd 8 CTs
4 dTR 9 RIA
5 GNd
Pin No. Function
1 GNd
2 TX+
3 TX-
4 GNd
5 RX-
6 RX+
7 GNd
LEB-2220
Pin No. Function
1 +12V
2 GNd
3 GNd
4 +5V
1 2 3 4 5 6 7
1 2 3 4
Pin No. Pin Name
Rs-232 Rs-422 Rs-485
1 dCd Txd+ data-
2 RXd Txd- data+
3 TXd Rxd+
4 dTR Rxd-
5 GNd
6 dsR
7 RTs
8 CTs
9 RI
SW2 SW3 SW4
ON
OFF
1 2 3 4
OFF
ON
OFF
ON
4 3 2 1 4 3 2 1