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  2. Kill switch - Wikipedia

    en.wikipedia.org/wiki/Kill_switch

    For fail-safe operation, the emergency stop button is a normally closed switch, which ensures that a broken wire will not prevent it from being activated, but may accidentally activate the emergency stop. In the European Union, most types of machinery are required to be equipped with an emergency stop according to the Directive 2006/42/EC ...

  3. Fail-safe - Wikipedia

    en.wikipedia.org/wiki/Fail-safe

    To make a PLC fail-safe the system does not require energization to stop the drives associated. For example, usually, an emergency stop is a normally closed contact. In the event of a power failure this would remove the power directly from the coil and also the PLC input. Hence, a fail-safe system.

  4. Panic button - Wikipedia

    en.wikipedia.org/wiki/Panic_button

    A medical alert panic button or medical alarm is an electronic device worn on a bracelet or necklace as part of a medical alert system. When pressed, it sends a wireless signal to a home console which dials alarm monitoring staff and alerts them of an emergency condition.

  5. Emergency brake (train) - Wikipedia

    en.wikipedia.org/wiki/Emergency_brake_(train)

    Emergency Brake Handle on Bombardier commuter rail equipment, Sounder, Seattle, WA. In the USA, an emergency stop cord is not used. Any visible cord running within the body of a railway car would have been what was known as the "communicating cord". This was a method of signalling the engine operator (known in the US as the "engineer").

  6. Push switch - Wikipedia

    en.wikipedia.org/wiki/Push_switch

    A push switch (button) is a momentary or non-latching switch which causes a temporary change in the state of an electrical circuit only while the switch is physically actuated. An automatic mechanism (i.e. a spring ) returns the switch to its default position immediately afterwards, restoring the initial circuit condition.

  7. Sifa - Wikipedia

    en.wikipedia.org/wiki/Sifa

    It is usually a pedal and/or large press button, which monitors the alertness of the driver. The driver has to repeatedly press a button after a fixed interval; if they fail to do so, the train will carry out an emergency stop. It complements the external train safety systems: PZB, LZB and ETCS. [3] The Sifa control display in the ICE 3

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