This is how my home automation talks to my house lighting. The power supply goes bad in them.
So I bought about $2 in parts and fixed it as other before me have. I used better caps they are higher temp. They think the get to hot and go bad. Sure saves paying 80 + shipping for a new one.
Here is the post.
Repair of 2413S PLM When the Power Supply Fails - Smarthome Channel - Universal Devices Forum
This setup runs my hot water recirculation pump. When you turn on a light close to water. Like a bathroom light it will run the pump for a certain amount of time. So when you get to the sink it is warm.
This was bad for a day before I fixed it man you don’t realize how much you like this feature until it is gone for a day.
I am very glad it is back.