Just to follow up - I wired these up both “wet” and “dry” and they work just fine
It is an industrial application (ice machines run off of 3 phase) but it works just fine as all the switches in the machine run off of a single phase of the three phase and we used one of the legs to power the FS20Z1 as well.
Now I just need to figure out a bypass - i’ve been using my phone exclusively to power on/off the machines - but if network goes out I need to have a way to switch to manual.
also - looking for a good timer - so each time i turn on the switch I can set it for 5 hrs, 10 hrs, or whatever.
I did a search in the forum - One individual wrote a simple timer app I think? not sure.
I downloaded and am using core - as an emergency stop (if switch is on for 15 hours straight, turn off) but it doesn’t work well. It doesn’t seem to know which the machine is switched on/off consistently. so it emergency stops the machine at unexpected times. . .