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Having trouble sensing contact closure on a Pro3.? As I recall, a CNMSX Pro worked out of the box.? I think the Pro2 did as well.? The ST-IO required a jumper move under the cover to switch from contact closure to reading voltage.? Where and how do I tell this what it's looking at?

Just checked mine.?

Stick a 1 on the PU Disable for the corresponding port.?

Then your digital FB signal is connected to the corresponding i1-i8 green ambiguous joins.? Not the i1-i8_Fb digitals if that makes sense.?

Thank you.? Working perfectly now.? The help screen for that wasn't much help.? It only briefly mentions 0 and 1.? I was totally thrown off trying to use the digital inputs o1-o8 and not getting anywhere.? I read somewhere that the use of 0 means unused, 1 for contact closure, 2 for reading voltage and 3 for reading resistance.

Well almost perfectly. Putting a 1 on all the PU disables held them all high.? Swapped them all out for 0's and now it's working as wished.

Woops.? You are correct.? I looked at my garage door beam sensor signals which isn't actually a dry contact.? No PU disable required as you have discovered!?

Yes but thanks anyway.? You pointed me in the right direction.