Pushbuttons + VMB1BL and VMB2BL

I would like to connect 3 blinds to the Velbus modules VMB1BL and VMB2BL. As a backup instance I would like to connect three push buttons on the contacts of those modules to have a manuel control available if system goes down.

I have carefully read the Velbus example (on page 3 of folder_velbus02en.pdf) and a second document (vmb2bl_uk_rev2.pdf) but I am not sure if Niko will be compatible.

Could someone confirm me if it is possible to use one of these Niko switches (niko.be/default.aspx?PageID= … roup=13837)

Niko 170-25900 (ROLLUIKDRUKKNOP VOOR ELEKTRONISCHE STURINGEN)
Niko 170-15900 (ROLLUIKDRUKKNOP ELEKTRISCH GESCHEIDEN)

Which of the above ones is the most suitable?

should not be a problem…