Lanner LEC-2110 - Manual (Page 14)

14
Board Layout
Chapter 3
Embedded and Industrial Computing
SW2: Select COM2 and COM3 Termination in RS-
485 This switch is used to enable or disable the signal
termination for COM2 and COM3. 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.
RS-232/422/485 Serial Port (COM3~COM6, CN2): It has
4 serial ports through terminal block connector. Note that
only COM3 can select among RS232/422/485.
SC3T1 and SC3T2: Select COM3 Protocol Setting
RS-232
RS-422
RS-485
Switch
Protocol
SC3T1 SC3T2
RS-232
(Default) 1-2 1-5
2-6
3-7
4-8
RS-422
3-4 5-9
6-10
7-11
8-12
RS-485
5-6 5-9
6-10
7-11
8-12
Note: When using RS-422/RS-485 in COM2, you
must enable the “Serial Port2/3 RS485 driver”
option first in the BIOS menu.
LAN1/LAN2 Ports (LANB1/LANB2): The LAN ports are
provided by RTL8111E-VB-CG Ethernet controller whose
interface complies with PCI-e 1.1 (2.5 Ghz) and IEEE
802.3az Draft 3.0 (EEE). It has advanced management
features including Wake-on-LAN and remote wake-up .
Pin No. Description
Fast Ethernet Gigabit Ethernet
1 TX+ MD0+
2 TX- MD0-
3 RX+ MD1+
4 T45 MD2+
5 T45 MD2-
6 RX- MD1-
7 T78 MD3+
8 T78 MD3-
Clear CMOS jumper (CMOS1): It is for clearing the CMOS
memory.
Digital I/O (DGIO1)
Digital IN/OUT(DIO1) Connector: The 8 pins of General
Purpose Input/Output (GPIO) support input and output
operations through the DB-9 female connector.
TTL Level is +5V; Maximum input current for each port
is 10mA; Maximum output current for each port is
100uA
Input/Output Voltage Logic Register
0~2V Low 0
2~5V High 1
Pin No. Pin Name
1-2 Normal (Default)
2-3 Clear CMOS
Pin No. Pin Name
RS-232
1 RTS5#
2 RxD5
3 TxD5
4 CTS5#
5 CGND
6 RTS6#
7 RxD6
8 TxD6
9 CTS6#
10 DGND
Pin No. Pin Name
RS-232 RS-422 RS-485
11 RTS3# TX- DATA-
12 RxD3 TX+ DATA+
13 TxD3 RX+
14 CTS3# RX-
15 EGND
16 RTS4#
17 RxD4
18 TxD4
19 CTS4#
20 FGND
SW2
ON
OFF
COM Port Pin Number Termination
COM2 Selector 1, 2 on/off Enable/Disable
COM3 Selector 3,4 on/off Enable/Disable
The default setting is “Disable”
SC2T1
2
1 6
5
9
5
1 12
8
4
SC2T2
1 2 3
10 9 8 7 6 5 4 3 2 1
20 19 18 17 16 15 14 13 12 11
COM6 COM5
COM4 COM3
Note: The orientation
of CN2 illustrated here
is opposite of the one
on the front panel.