Door control device. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Security devices and object signaling
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Remote control of whether a door (for example, a garage) is open or closed allows a special device to be implemented.
A limit switch S3 is installed in the door jamb in series with the diode V2. In the initial position, the door is closed, the contacts of the switch S2 are closed, the coil of the relay K2 is powered by a current rectified by diodes V2 and V3. The winding of relay K1 is de-energized due to the counter-connection of diodes V1 and V3. A break in the wires or opening of the contacts of the switch S2 leads to a de-energization of the winding of the relay K2. The status indicators of the door and the line are incandescent lamps H1 and H2, switched on by contacts K1.l and K2.1 of the corresponding relays.
Relay K1 and K2-RES-9 (passport RS4.524 200), capacitors - K50-6; switch S2 - any type. The voltage of the secondary winding of the power transformer T1 is 15 ... 17 V.
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