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An emergency switch in Japan. On railways, [1] an emergency stop is a full application of the brakes in order to bring a train to a stop as quickly as possible. [2] This occurs either by a manual emergency stop activation, such as a button being pushed on the train to start the emergency stop, or on some trains automatically, when the train has passed a red signal or the driver has failed to ...
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").
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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
(Most machines will have a red stop button and an emergency stop - the emergency stop stays down when you hit it, and should not be used for normal stopping because the integrity of the latching system is safety critical.) Presumably everyone understands "Stop" so why we introduce the "binary on-off glyph" is a mystery. But it is all trivia anyway.
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A number of emergency facilities are available in MRT stations, such as emergency stop plungers to stop trains approaching or at the station, and emergency telephones. Emergency communication buttons in trains allow communication with MRT staff, and emergency detrainment ramps at both ends of the trains allow for evacuation to the track or ...
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.