Adding Auxiliary contact for ATEX certified push button still hold its compliance with ATEX or its lose
According to the ATEX standards and european directive, user is not allowed to modify a certified ATEX product. For example, XB4BP383B5EX.
In this case, user lose the initial certification and have to ask for a new certification via a notified body.
This is a legal reason why in the ATEX products, user is not allowed to change an operator head and add or replace a contact block.
Any adaptation requires new certification by a notified body.