Is it possible to make a routine so that when I press/send impulses to a zwave/zigbee pill it opens my ID Lock?
Would like to add an impulse-switch on the 2nd floor to open door downstairs.
Welcome! 
Is it this Zwave lock?
I’m guessing “pill“ is a Google translate error and you meant “button“?
Except you can’t send messages to most buttons, so I’m confused. 
If indeed you have the zwave lock that I linked to, and you are using the Samsung SmartThings home automation platform (which is what this forum is for), then it should certainly be doable.
Which SmartThings/Aeotec hub are you using? And which country do you live in? The options for the solution will vary a little bit, depending on those answers.
Also, if you can link to the kind of “pill“ you were thinking of, that would also help.