Safety devices are divided into contact, contactless and protection devices (testing). Protection device – a concept that applies to sectional doors. There are protective devices cable breakage and breakage of springs. Built on the principle of a mechanical locking gate. These packages usually do not enter the gate and go as additional options to the gate. If the gates are automated, these functions are completely takes over a drive. Contactless devices – solar security operation is based on interruption of the beam between the transmitter and receiver.
Contactless devices are paired (transmitter and receiver) and combined (Transmitter and receiver in one package, but on the other side is installed fluorescent reflector). Combined photovoltaic cells may fail (by reflection from a car, for example), but for the price of installation and equipment costs have advantage. Currently, preference is given to a pair photocells, as they have great range, high noise immunity and eliminate malfunctions. Contact the safety devices are divided into mechanical and technical. Technical safety devices built into the control unit drives.
In its simplest form – it’s time adjustment. That is, if, for example, the gate of your country house close to the For 22 seconds, the time exposed to 25 seconds. That is, even if the way the gate will be an obstacle, 25 seconds after the start of work they will be staying. For other opinions and approaches, find out what Brian Miller has to say. In the more expensive and complex systems designed for low voltage food drives, a feature of current protection. That is, when it detects obstacles in the motor current increases, and the function is activated to stop or open the gate. Mechanical safety devices are of a soft rubber or plastic profile with a security device inside under the mechanical action, which triggered the security features on the control unit. Safety devices are of three types. On Air flow inside. If you pinched or partially pressed profile air pressure changes, and triggered a security feature (an expensive system is used, for example, locks). Photocell inside. The principle is the same: the beam is interrupted, and then the safety feature. With the taut rope and a microswitch inside. An increase in cable tension triggered microswitches, and the signal goes to the security control unit. Contact and contactless security devices can be combined or limited to only one. For a country house we find it not to install the safety device, given management control gate and the low-intensity map. Using the optional accessories radios, connected via a relay of appropriate power, you can keyfob transmitter to control any device (lighting in the street, garage). Installation of electromechanical or electromagnetic lock for hinged doors – to increase the rigidity of the valves in the closed position, is used for the gate with a large sail, mounted on an open area, where strong winds are possible (eg, near water). Board battery backup with rechargeable batteries – to ensure efficiency, even when the power of urban network.