User`s manual

UPort 1200/1400/1600 Series User’s Manual Driver Installation
Adjustable Pull High/low Resistors for the RS-485 Port
The UPort uses DIP switches to set the pull high/low resistor values for each serial port.
To set the pull high/low resistors to 150 KΩ, make sure both of the assigned DIP switches are in
the OFF position.
To set the pull high/low resistors to 1 KΩ, make sure both of the assigned DIP switches are in
the ON position. This is the default setting.
1 2
SW
Pull High Pull Low
ON
1 KΩ 1 KΩ
OFF
150 KΩ 150 KΩ
UPort 1200 DIP Switches
Port1, Port 2
P1 P2
UPort 1400 DIP Switches
Port1, Port 2,
Port 3, Port 4
P1 P2 P3 P4
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