After trying to get a SimpleHomeNet EZIO8SA to work reliably for almost a year I gave up and switched to the EasyDaq USB8PR 8 Relay Board. It is not presently supported by Indigo but can be scripted to work very well. I have written a script which is easy to use. In an Action you call either a relayON(enter relay number here) or relayOFF(enter relay number here). I have written the script so if a relay is ON or OFF it cannot be requested twice to prevent the logic from screwing up. The board handles up to 10 amps 240 volts. You need Serial Bridge to run it and I have written an app ( http://www.duc.scrapping.cc/home_auto/relays8.shtml ) to switch the relays OFF and ON just so you can see how it works. If anyone wants more information feel free to PM me. I'll be posting the script and app in the near future.
bob