The new Series 04 Fail-Safe Emergency-Stop Switching Element’s “fail-safe” element will detect if the stop switch actuator becomes disconnected from the emergency stop actuator. If there is any defect, the failsafe contact opens, cuts power and stops the machinery as if in an emergency shutdown routine. These new contact blocks will fit any new design that utilizes EAO’s Series 04 emergency-stop switches. Retrofitting existing applications is easy as well.