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Switching on, switching off, short-term switching off a voltage, supplied to a currrent current loop, for powering external fire alarm. Voltage drop is used to reset a trigerred triggered alarm into initial status:
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Switching on, switching off, short-term switching off a voltage, supplied to a currrent current loop, for powering external fire alarm. Voltage drop is used to reset a trigerred triggered alarm into initial status:
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