Boxford TCL125. (Fresh start )

[John11668]

I think I have sussed the control wires to the relay now Inee, and I havent disturbed any others so hoping it will work when it gets correct inputs .
Will see what happens when I get new power supplies for BOB and The relay board .

Thanks to all for your help,

[John11668]

So being a bit pedantic here in trying to understand the difference between 0v, and Ground?? Remember I am not an electrician.
On the diagram included above, the Small DC voltages are shown as say 12v to 0v. AC supply is L,N,and E, and the 0v is connected back to earth anyway.

Some boards have both 0v and GND suggesting at least a subtle difference , And the TCL 125 control panel is a veritable spaghetti of green and white cables all of which seem to be connected to the metal chassis anyway. Is it OK to connect anything resembling 0v,,GND, and earth to the metal chassis provided that it in turn is securely connected to the incoming Earth conductor ?

I will be adding my new power supplies to my upper deck tomorrow and clearly it would be neater if these could be earthed to the chassis , and where a PSU has connections to L,N,E, and V- ,V+ is there any reason why I cant link E and v- and fasten to the chassis locally to the chassis locally?