Power wiring 6HC + 1LC + Main relay

[PetrKroupa]

Hello,
I would like to use the function to control the power supply. I plugged the relay and the M80 and M81 work. I use duet3 6HC + raspberry +1LC tool board. 5V Supply for raspberry and 6HC with an external 5V source. After switching on the relay, the main 28V power supply is activated. The problem is that only then goes the power to the 1LC tool board and board turn on. So I'm bothered by error Response timeout: CAN etc... . When I reset board, the power turns off again and I start again. It's an endless loop. If I leave the main power supply on, everything works.

Is there some solution?

[MaxGyver]

This post is deleted!

[DIY-O-Sphere]

@petrkroupa
For me it works on a Mini5+ with toolboard, but I do not have SBC
My wiring is described here. https://forum.duet3d.com/topic/19161/smart-remote-power-control.
Maybe you show us yours too.

These are the last 2 lines of my config.g

M80                               ; switch Duet on
G4 S1                             ;wait for expansion boards to start

[PetrKroupa]

Hello,

I confirm that it works. 6HC is powered by an external 5V source. switch 5v internal - off, The other two are connected.

config:

M80
G4 S2
.
.
.

It works exactly the way I wanted it to. Thanks so much for the help !!