
NPort 5000 Series User Manual
185
Setting up terminators for a 4-wire RS485 network
NPort IA5000A Series (DIP Switches)
The DIP switches are located on the PCB board; you will need to take off the covers to access them. To set
the pull-
high resistor to 150 KΩ, flip DIP1 to “OFF,” and then set the pull
-
low resistor to 150 KΩ, and then
flip DIP2 to “OFF.” To set the pull-
high resistor to 1 KΩ, flip DIP1 to “ON,” and then set the pull
-low resistor
to 1 KΩ, and then flip DIP2 to “ON.” Make sure that DIP3 is “ON” to enable the 120Ω terminator. The
default settings for the pull-high and pull-low resistors, and the terminators are all at “OFF.”
NPort IA5150A/IA5250A Series