electronic doorkeeper - the latest generation

This automatic control device can be used wherever a vertical sliding gate is to be opened and closed in response to light conditions at dawn and dusk, for instance, on a henhouse, etc.

The sensitivity of the system is adjustable. Using our timers, it is possible to open and to close the sliding gate according to the time setting or to open it according to the time setting and to close it in response to the light conditions at dusk

The VSB unit is suitable for outside installation, is weatherproof, can readily be exposed to sunlight and is insensitive to lightning stroke.

Mounting is very easy: Open the sliding gate, fasten it on the VSB unit and insert the batteries.

The lower stop will be automatically "chosen" by the sliding gate, i.e., when the latter reaches the lower position.
The maximum stroke length of 50 cm can be increased, upon request. The system makes it also possible to operate several sliding gates via idlers.

Power supply: 4 type AA (LR6) alkaline batteries.

Latest Modifications:

•   Compact geared motor with steel gears ensuring extremely long life.
•   Battery life now 3 to 4 years with an HS sliding gate or 2 years with a 1.5-kg sliding
    gate featuring a 50-cm lift.
•   Dorkeeper operates considerably more quietly now.
•   Thanks to 40-kg breaking strength, the rope can hardly break any more.
•   Electronic shutdown of motor within one second when the sliding gate is blocked.
    Once the blockage ist removed, the sliding gate will be opened within three minutes.
    The strain on the batteries is virtually negligible.
•   Tensile force: 200 g to to 3 kg, with idler UR on the sliding gate (pulley) 6 kg.

Several thousand VSB Electronic Doorkeepers have proved to be effective in Europe, America, Africa and Australia since 1983 (from Oslo to Lagos, from Sydney to Buenos Aires, from Los Angeles and Montreal).

This latest generation has been produced with the aid of SMT-Technology. The electronic components are fixed to the underside of the PCB (printed circuit board) and are safely protected against corosive gases, humidity and dirt by a special varnish.