UNO-2271G_V2 User Manual 42
A.8.2 COM Port RS422/485 Termination Resistor Setting
A.9 AT/ATX Setting (PSON1)
PSON1 can be used for AT/ATX setting. The default setting is ATX mode. See the fol-
lowing table for jumper configuration
SW1 Termination Resistor Setting
Description
This switch is used to select Termination Resistor (120 ohm)
for long distance transmission or device matching.
Default Bit3 off & Bit8 off
COM1 Bit3 on
COM2 Bit8 on
AT 1-2
ATX 2-3 Default
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