live 230V~
	 |
	 |
	 |
	 |_______
	 |	|
	_|_	|
	| |	|
	| |	Voltage -> U/R
	| |
	|_|	|
	 |	|
	 |______|
	 |
	 |
	 0
	
	Ouput (lamp or so)
	
	 0
	 |
	 |
	Neurtal