FIELD: protective devices.
SUBSTANCE: invention relates to means of protecting small-size points of trade from robberies. Device comprises a mark generator, emitting pulses with period of 30 seconds, an alarm button, which corresponding contact is connected to the reset input R of the counter, and the other one – contact with clock input of counter, made so that potential at its output is increased through 180, 210 and 240 s after count of pulses from mark generator, with possibility of connection with various actuators.
EFFECT: high reliability of protection by using a combination of technical means and illegal actions.
1 cl, 1 dwg
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