Is it possible to work with switches Niko

type 170-05000

and can anyone explain the difference between NO / NG



Yes, they are compatible with the pushbutton module.

NO: normally open contact.
NG: normally closed contact

is it possible to have a controle led whith the new niko buttons ?
they work on 230 V how we must make the cabling :question:

You should remove the 230V indicator lamp and replace it by the supplied leds.