By default, all 4 InoDrive digital inputs are configured to be electrically PNP. You can use the Set Input Polarity block to change any or all of the digital inputs to accept an NPN electrical signal.

Item Description
Select the Slot for the particular InoDrive you want to set input polarity
Select the specific digital input (0,1,2, or 3) that you want to change
From the drop down, select either the PNP or NPN option