Everyone knows the emergency stop switch, usually just called emergency stop. The actual technical term here is latching switch, determined by the underlying mechanism. The operator presses the switch in, usually firmly. In this position, the latching switch is then mechanically fixed and the circuit is closed. These switches are required by law for machines and systems in industrial environments. There, they ensure the safety of employees during operation. If the machine has to be stopped quickly to prevent injury or damage, all that is needed is a tap on the emergency stop. The machine then stops immediately. The now closed circuit sends a pulse to the machine control system, which stops the machine immediately without it continuing to run.
This also distinguishes the emergency stop switch from the emergency stop switch, which, contrary to popular belief, does not have the same function. An emergency stop interrupts the power supply to the entire machine. The switch therefore acts as a normally closed contact. As a result, the machine does not remain in its current position, but may continue to run in its mechanical processes for a short time. For this reason, almost only emergency stop actuators are found in modern machines, as they can guarantee a higher level of safety. The reset functions in each of the two variants, emergency stop and emergency stop, but in the same way, by turning the so-called mushroom, the, according to the regulations, red key cap on a yellow background.