Lanner LEC-2055 - Manual (Page 13)

13
Board Layout
Chapter 3
Embedded and Industrial Computing
COM Protocol
Setting
RS-232 RS-422 RS-485
Selector 1
Selector 2
Selector 3
Selector 4
1 ON
2 OFF
3 OFF
4 OFF
1 OFF
2 ON
3 OFF
4 ON
1 OFF
2 OFF
3 ON
4 ON
Default:RS-232 Only
Note: Enable “serial Port 1 (2 ) RS-485 driver” in
the BIOS when using RS-422/RS-485.
SW5: Select COM1/COM2 Termination in RS-485
This switch is used to enable or disable the signal
termination for COM1 and COM2. We strongly recommend
that you disable termination when the port is configured
as RS-232 and enable it when the port is configured as RS-
485/RS-422
COM Port NO.
Setting
Port No. Without 120 Ω
Termination
With120 Ω
Termination
Selector 1
Selector 2
COM1 OFF ON
OFF ON
Selector 3
Selector 4
COM2 OFF ON
OFF ON
Default: all OFF.
PCOM1: Select COM1 pin 9 function
PCOM2: Select COM2 pin 9 function
RS-232 COM Port(COMB1, COM3): It is the RS-232 serial
pin header.
Jumper Settings
Serial-ATA Connector (SATA1): It is for connecting a 2.5’’
SATA 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 (PS4S1): It is for
connecting the SATA power cord.
Serial Port(COM1/COM2): It is the RS-232/422/485 port
through the D-SUB9 connector.
RS-232/422/485 Pinout:
SW3: Select COM1 Protocol Setting (SW3)
SW4 : Select COM2 Protocol Setting (SW4):
RS-232
RS-422
RS-485
6 7 8 9
1 2 3 4 5
Pin No. Pin Name
RS-232 RS-422 RS-485
1 DCD TX+ D+
2 RXD TX- D-
3 TXD RX+ --
4 DTR RX- --
5 GND GND GND
6 DSR -- --
7 RTS -- --
8 CTS -- --
9 RI -- --
Pin No. Function
1 GND
2 TX+
3 TX-
4 GND
5 RX-
6 RX+
7 GND
7
6
5
4
3
2
1
Pin No. Function
1-2 RS-232 Ring (default)
3-4 +5V
5-6 +10.5V
1
3
5
7
9 2
4
6
8
10
LEB-2055
Pin No. Function Pin No. Function
1 DCD 2 DSR
3 RXD 4 RTS
5 TXD 6 CTS
7 DTR 8 RI
9 GND 10 KEY
Pin No. Function
1 NC
2 Ground
3 Ground
4 5V
4
3
2
1
4 3 2 1
Off
ON
COM1
COM2
1
3
5
2
4
6
4 3 2 1
SW5
Off
ON
SW5
Off
ON
4 3 2 1