I am contemplating putting in some relays and running the PSU Control plugin. I have a few questions regarding the best way to accomplish this. I have been looking for the right relay to use. I saw a video where a relay was being used to switch the 24V between the PSU and the controller board. I then looked at the relay and saw that it is rated for 10 amps. A Mean Well LRS-350-24 puts out up to 350.4 Watts or 24VDC at up to 14.6 amps. I have the Creality V4.2.7 board in my Ender 3, which comes with a 15 amp fuse. This appears to be a problem waiting to happen if I were to go with a relay rated to 10 amps. I could put the incoming mains through the relay, as it would only pull a max of 6.8 amps at 115 VAC, but I would rather not mess with it if I can help it. I wish the PSU would have a remote switch like an ATX power supply and I could run the remote switch wires to the relay... that would make me more comfortable.
Another question I have related to the PSU Control plugin is the correlation between the PSU Control plugin and the PSU Control RPiGPIO plugin. I just want to make sure I understand. Is the PSU Control just a catch-all user interface to turn on and off the device but doesn't actually do so directly? Is the sub-plugin, like RPiGPIO the "behind the scenes" method of actually doing so? The funny thing is, my Ender 3 is plugged into an older APC switched PDU and I can log into the PDU interface and turn it on and off there but I don't think there is a way to tie it in with OctoPrint or the PSU Control plugin.