Access control systems are present practically everywhere today – at offices, business centers, the warehouse centers, garages, parkings, hotels, educational and trade enterprises, public transport and so on. What is represented by these systems and what they happen?
All about SKD
Modern control systems of access are divided into two classes on way of management, namely into network and autonomous control. The network or centralized devices exchange data with the central computer and the blocking devices, creating reports on events and passing of employees on the territory and also keeping control and account of working hours. Besides, network SKD can be integrated with the systems of photoverification, video surveillance, OPS and so on. Independent ACS work without the central computer and do not need distant control, cable lines or management of the operator.
Universal control systems of access work by the principle of network SKD, however at various malfunctions they are capable to switch in the autonomous mode.
SKD equip with different types of identifiers. So, the mechanical type of devices will recognize codes of keys and maps with the help of perforation and other constructive parts. The magnetic identifier will recognize the magnetized site of surface, and optical – the barcode in the reflected or passing optical radiation. The electronic contact identifier will recognize information on chip of the admission or key, acoustic – the coded acoustic signal and combined – combination of several identification elements.
Choice of SKD
It is desirable to choose expensive control systems of access in case the number of users exceeds the number of employees of the enterprise – they will be able easily and quickly to process all arriving data, working at full capacity. At the small enterprises it is reasonable to install throughput systems more simply. SKD with the minimum redundancy of additional equipment, but with addition of the necessary modules in case of need will become the most favorable acquisition.
The modern automated SKD check the code of the card and open the electromagnetic lock in case of its compliance to the set parameters.
Before purchase of control system of access it is necessary to ask in detail at the supplier ways of expansion of system: what equipment should be bought in addition what elements will need to be replaced, modernization and what service support the supplier will give in the future what is the time will borrow. It is also desirable to consider the legal framework and the possibilities of providing certain information in appropriate authorities in case of offense.