That is correct. When Inputs 5 & 6 are at GND and they are in digital mode the Input is in the Off state. If using Inputs 5 & 6 in digital mode and actually trying to have them change state a pull up resister to +5 V is required to turn the respective Input On with GND turning the respective Input Off.
Reply To: How do I set EXIO6I Analog Inputs to 0? 2017-12-21T22:32:18+00:00