Three-level lightning prevention module of internet access protection

Abstract

Provided is a three-level lightning prevention module based on internet access protection. A first level lightning prevention system is located on an RJ45 interface side of an input side, and comprises four gas discharge tubes which are located between differential data lines and are connected in parallel. A second level lightning prevention system is located on an isolation transformer, and a wire is pulled out from a central tap of each winding of the isolation transformer to be connected to the ground by being connected with a voltage dependent resistor in series. A third level lightning prevention system A is also located on the isolation transformer, and a wire is pulled out from the central tap of each winding of the isolation transformer to be connected to the ground by being connected with an inductor and a bipolar transient voltage suppressor in series in sequence. A third level lightning prevention system B is located on the isolation transformer and is divided into four protective sets, and each protective set comprises a rectifier bridge and a one-way TVS connected with the rectifier bridge in parallel. The three-level lightning prevention module of the internet access protection has the advantages that the protection level is high, TVS junction capacitance is processed ingeniously, signals are not decayed, response time and flow of all components are utilized reasonably, and multi-level protection is formed.

Description

technical field [0001] The invention relates to the field of lightning protection and communication, in particular, to a three-level lightning protection module applied to the protection of 10 / 100 / 1000M network ports. Background technique [0002] The lightning protection board is a device that connects the motherboard and the external interface and can suppress surges, ESD, lightning and other impacts. With the development of wireless WIFI, wireless coverage and wireless monitoring have been extensively constructed. These devices are usually placed outdoors to withstand the impact of wind, rain and lightning, which urgently needs to enhance the lightning protection capability of the product. In particular, power over Ethernet is often used in network devices, and Power Over Ethernet (PoE) is a technology for integrating power supply into standard local area network devices. It can supply power to network devices, such as IP phones, IP cameras and APs, by using the same ca...

AI Technical Summary

Problems solved by technology

Designed to solve the problems of high protection requirements and high signal quality requirements

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