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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 ...
An Internet kill switch is a countermeasure concept of activating a single shut off mechanism for all Internet traffic.. The concept behind having a kill switch is based on creating a single point of control (i.e. a switch) for a single authority to control or shut down the Internet in order to protect it or its users.
In Microsoft Windows and ReactOS, a PC or server is shut down by selecting the Shutdown item from the Start menu on the desktop. Options include shutting down the system and powering off, automatically restarting the system after shutting down, or putting the system into stand-by mode .
The safety shutdown system shall shut down the facilities to a safe state in case of an emergency situation, thus protecting personnel, the environment and the asset. The safety shutdown system shall manage all inputs and outputs relative to emergency shutdown (ESD) functions (environment and personnel protection).
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.
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Critical instrumented functions (process shutdown, emergency shutdown) Actuated isolation valves; Pressure relief devices; Blowdown valves and flare system; Drilling well control (blowout preventer, mud and cement) Ventilation and heating, ventilation, and air conditioning; Drainage systems; Ballast systems; Hull cargo tanks inerting system ...
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