Increasing the Noise Immunity of the Electronic Access Control System under the Influence of ESD Impulse Interferences

Electronic access control systems are one of the main security elements of controlled areas in a building. Reliable functioning of the electronic access control system in the conditions of electromagnetic interference is the basis for their effective use. Sources of impulse interference are electrostatic discharge from people passing through the turnstile, electromagnetic fields or conducted interference in the power supply network from a lightning discharge, industrial facilities, etc. These sources create impulse interference in the nanosecond or microsecond range. Interference can lead to a violation of the quality criterion of the system. The paper considers new constructive ways to reduce impulse interferences in communication lines or secondary power supply circuits of an electronic access control system. An analysis of the effectiveness of these methods is given.