I have an SC546 Chime Module that I've had installed for 6 months or so. I'm using it with a home alarm system that I've cooked up myself. I rarely use it, but today I was testing some code changes and discovered that it no longer responds to commands. It will sound when I plug it in, but not when I send a command.
I tried it on different housecodes, with signals sent by RF and wireline, and it seems to be completely dead.
It's a cheap item and I would like to replace it, but I don't want to keep buying them if they all have such a short life. I notice that there's an X10 Pro branded version with model number PHH02. It looks identical, and I assume that there's no difference between the 2 units.
Does anybody else have experience with these modules? What kind of failure rate do you see with these? Is there any advantage to the Pro version?