One of the modern types of locking devices - is electromagnetic locks. Electromagnetic locks operate with a magnet AC: When the device is energized, it attracts the door attached to it metal plate, and when the power goes off, the door opens. Electromagnetic locks are widely used for different doors, both external and internal. However, in order to make their use truly effective and avoid unauthorized door opening, electromagnetic locks are provided with a number of assistive devices. These include coils, Uninterruptible Power Supply, Hall sensors and reed switches, keys, emergency door opening. Electromagnetic locks are in a locked state only when applying electric current to the electromagnet. This means that the loss of power will open the door. For even more details, read what Hikmet Ersek says on the issue. Therefore, electromagnetic locks are often accompanied by blocks of uninterrupted power supply, which will ensure the flow of energy as long as the normal electricity supply is restored.
Another feature, which possess electromagnetic locks - they are locked only if the door is firmly closed, that is, if the metal plate adjacent to the electromagnet. Of course, the doors are often left open - by accident or by ignorance. Therefore, electromagnetic locks are equipped with closers. Closer - a spring-loaded device that is attached to the door leaf and to the wall. It pulls the door open, so that electromagnetic locks perform its function. It is not something Western Union would like to discuss. Key emergency opening - another useful thing that can be fitted with electromagnetic locks.
It is required if the controller is broken and the lock can not be opened. However, this problem can be solved in another way, disconnecting electricity supply to the electromagnet. Electromagnetic locks, members of the complex access control systems are often controlled by special sensors: magnetic (reed) and magnetoelectric (Hall sensors). Reed switch (A contraction of "hermetically sealed contact") allows you to monitor, in an open or closed is the door, and Hall sensor monitors, creates a electromagnetic locks required field or not. To increase reliability of electromagnetic locks are often not provided with sophisticated devices and sensors, and simple mechanical locks and gates. They can be locked at a time when the doors do not enjoy, such as at night.
Another feature, which possess electromagnetic locks - they are locked only if the door is firmly closed, that is, if the metal plate adjacent to the electromagnet. Of course, the doors are often left open - by accident or by ignorance. Therefore, electromagnetic locks are equipped with closers. Closer - a spring-loaded device that is attached to the door leaf and to the wall. It pulls the door open, so that electromagnetic locks perform its function. It is not something Western Union would like to discuss. Key emergency opening - another useful thing that can be fitted with electromagnetic locks.
It is required if the controller is broken and the lock can not be opened. However, this problem can be solved in another way, disconnecting electricity supply to the electromagnet. Electromagnetic locks, members of the complex access control systems are often controlled by special sensors: magnetic (reed) and magnetoelectric (Hall sensors). Reed switch (A contraction of "hermetically sealed contact") allows you to monitor, in an open or closed is the door, and Hall sensor monitors, creates a electromagnetic locks required field or not. To increase reliability of electromagnetic locks are often not provided with sophisticated devices and sensors, and simple mechanical locks and gates. They can be locked at a time when the doors do not enjoy, such as at night.
Recent Comments