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Board Layout

Chapter 3

Embedded and Industrial Computing

SC2T1, SC2T2: Select COM2 Protocol Setting

RS-232

RS-422

RS-485

Switch

Protocol

SC2T1 SC2T2

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.

Jumper Settings

Serial-ATA Connector (SATA1): 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 (PS4S1): It is for

connecting the SATA power cord.

RS-232 Serial Port(COM1): It is a RS-232 port through the

D-SUB9 connector.

Select COM1/COM2 Pin 9 function: Pin 9 of RS-232

port (PCOM1/PCOM2) can be altered according to the

following definition:

RS-232/422/485 Serial Port (COM2): It is a RS-

232/422/485 port through the D-SUB9 connector.

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Pin No. Pin Name Pin No. Pin Name

1 DCD 6 DSR

2 RXD 7 RTS

3 TXD 8 CTS

4 DTR 9 RI

5 GND

Pin No. Function

1 GND

2 TX+

3 TX-

4 GND

5 RX-

6 RX+

7 GND

LEB-2110A

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

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SC2T2

SC2T1

Pin No. Function

1-2 (Default) Ring In

3-4 +5V

5-6 +12V

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 40 41

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