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High Resolution CCTV Systems - HD CCTV
IP video systems
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Access control
Videodoorphones, doorphones and intercoms
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Each access control system's integral part. Physical means of access rights realisation. Most important
element influencing entire systems efficiency. According to principle that system is as good as weakest
link, important part of designing access control system is correct choosing elements like doors, gates, etc.
Choosing correct "locking" element should be made with careful calculation of passageways characteristics,
movement density, passageway state monitoring, etc.

Next device having strong influence on security and functionality of passageway are electric locks. Their
functioning principle and possibility of electric steering allows realisation of passageway authorisation
rights. We divide electric locks into two groups:

- Fail Safe - open without any voltage applied. They find their usage in evacuation installations. When power
is down all the passageways are open for evacuation.
- Fail Secure - open with voltage applied.

Electric strike
Most popular way of making passageway accesible. Installed in door-frame in place where standard lock's catch is. Applying voltage causes electromagnet to work, releases electrick strike and unlocks the door.

Electrick locks
Made in form of conventional lock. They differ only in electric steering of blocking mechanism or releasing handle. Thanks to door state sensor, eloectrick lock can be used for unlocking the door from the protected side.

Magnetic locks
Device bases on magnetic attraction between electromagnet installed in door-frame and metal yoke mounted on door's edge. Standard electromagnet can hold from 300kg up to 500kg with power supply of 12VDC/0.5A. Work principle is very simple: applying voltage - locks the door. With simplicity some disadvantages come, lack of voltage unlocks the door instantly (it is advised to use convencional locks as well), door-frame and doors it self should be prepared for installation yoke and electromagnet. Those disadvanateges can be used in evacuation systems, where it is requiered for doors to be unlocked when power is down.

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Last modification date:  2021-01-16 , 7:45:29

Products, security systems, control panels, IP cameras, CCTV, Warsaw, monitoring, intercom, access control

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Volta Warsaw. Alarm and fire detection systems - CCTV, motion detectors, cameras, exit buttons and fire buttons, outdoor motion detectors, doorphones, monitoring, leakage detectors and alarm devices. Also sales via web.

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