Thanks for the reply. Very useful information here. I looked at my unit and it has a blue LED on the front, but not the rear. So based on that I am assuming it is a 500 series device. I did just purchase it however and am wondering if I should have the PolisyPro instead? I did not see any data on the listing on Amazon from UD which indicated that so perhaps I missed something there.
The Aeotec device I'm playing with is physically sitting next to the ISY994i. I don't think range is the issue. This is more of that the devices it discovered don't seem to be interactable. It's almost as if it doesn't understand there are buttons. Additionally, having played with the Programs, it isn't obvious to me how I'm supposed to code for them. I assumed they would exist in the "If" logic, but really unsure about that. The documentation (PDF) I found was confusing to navigate.