These switches ensure NC contacts open when the contact block is separated from the operator. NC contacts of conventional E-Stops remain closed if the contact block gets separated from the operator. Direct Opening Action ensures that even if the contacts are welded, the force applied on the button will directly open the contact. And a Safety Interlock Mechanism keeps contacts open when the operator is locked. XN E-Stops can also save space. The XN1E series has a depth of only 47.7mm for four contacts. The XN5E series extends just 21mm from the front of the panel.