Com Port Rs422/485 Termination Resistor Setting; At/Atx Setting (Pson1) - Advantech UNO-127 User Manual

A.7.3

COM Port RS422/485 Termination Resistor Setting

SW1
Description
Default
COM1
COM2
SW2
Description
Default
COM3
COM4
A.8

AT/ATX Setting (PSON1)

PSON1 using jumper for setting AT/ATX mode. The default setting is AT mode. See
the follow- ing table for jumper installation for mode.
Default
Description
ATX Mode
AT Mode (Default)
UNO-127 User Manual
Termination Resistor setting
This switch is used to select Termination Resistor (120 ohm) for long
distance transmissions or device matching.
Bit3 off & Bit8 off
Bit3 on
Bit8 on
Termination Resistor setting
This switch is used to select Termination Resistor (120 ohm) for long
distance transmissions or device matching.
Bit3 off & Bit8 off
Bit3 on
Bit8 on
PIN 1 2 3
Instruction
Closed 2-3
Closed 1-2
30
PSON1