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LEC-2050 Fanless Embedded System User’s Manual

SC2T1/SC2T2: Select COM1 Type Jumper

COM1 TYPE SC2T2 SC2T1

RS-232 (Default) 1-2 1-2,5-6,7-8,11-12

RS-422 3-4 2-4,3-5,8-10,9-11

RS-485 5-6 2-4,3-5,8-10,9-11

PCOM1: COM1 Pin 9 Function Jumper

The Ring Indicator (pin 9) of RS-232 port of COM1 can be altered to provide

different functions as the following:

PIN NO. DESCRIPTION

1-2 +5V

3-4 +12V

5-6 RI

COM2 Pin Definition:

Serial Port Type

PIN NO.

RS-232 RS-485 RS-422

Data Carrier

Detect (DCDA #)

TXRX- TX-

Receive Data

(RXDA)

TXRX+ TX+

Transmit Data

(TXDA)

RX-

9 6

COM2

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 37 38

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