Com Port Rs422/485 Termination Resistor Setting - Advantech UNO-137 V2 User Manual

Intel atom x6413e and x6425re processor automation computer, with 2 x lan, 2 x com, 4 x usb, 2 x dp, 8 xdio, 1 x mpcie, and 2 x m.2

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RS232 Mode

COM1

RS485 Mode

RS422 Mode

A.8.2

COM Port RS422/485 Termination Resistor Setting

Table A.11: COM Port RS422/485 Termination Resistor Setting

SW1

Description

Default

COM1

COM2

UNO-137 V2 User Manual

Bit 6 ON

Bit 1,2,3,4,5,7,8,9,10 OFF

Bit 7,9,10 ON

Bit 1,2,3,4,5,7,8 OFF

Bit 6,7,9,10 ON

Bit 1,2,3,4,5,8 OFF

Termination resistor setting

This switch is used to select the termination resistor (120 ohm) for long

distance transmissions or device matching

Bit 3 off & Bit 8 off

Bit 3 on

Bit 8 on

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