Schneider XB2BR mushroom head spring return button

Precautions:The buttons of the XB2 series can be added with a self-locking module (ZB2BZ21C) to achieve the self-locking function (except emergency stop buttons, selections, and key switches) Note: This self-locking module cannot lock the button head, only the contacts, and only one layer of contacts can be installed after the self-locking module is installed.