Can yet set the relay for open or closed? Does the relay throw is you lose power to the unit? Sounds like a great idea!
I'm using a dual pole relay so it can be wired either normally open or closed and when safety activates it can either break a circuit or make a circuit depending on what the end user wants to interrupt or activate.
So far based on the feed back I'd say the majority of people seem to find the same value in the device as I did. This gives me some motivation to build a more friendly version of the unit with some sort of interface for end users to make adjustments. I'll see what I can come up with