Lightning protection isolator and lightning protection isolation circuit

Abstract

The invention discloses a lightning-protection isolator and a lightning-protection isolating circuit. The lightning-protection isolator comprises a shell, an isolator mainboard, lightning-protection isolator input terminals A1-A3, a surge protecting module for lightning protection and a connecting unit, the surge protecting module and the isolator mainboard are fixed in the shell, the lightning-protection isolator input terminals A1-A3 are fixed on the shell, and the surge protecting module is electrically connected with the isolator mainboard through the connecting unit which is electrically connected with the lightning-protection isolator input terminals A1-A3. The lightning-protection isolating circuit comprises an isolating circuit, a surge protecting circuit and three coordinate resistors R54, R31 and R22. By the lightning-protection isolator and the lightning-protection isolating circuit, residual voltage can be eliminated, and service lives of the lightning-protection isolator and the lightning-protection isolating circuit can be detected automatically; when the surge protecting module is replaced, work of the isolator is unaffected, reliability of a system is improved, and cost is lowered.

Description

technical field [0001] The invention relates to the technical field of isolators, in particular to a lightning protection isolator and a lightning protection isolation circuit. Background technique [0002] With the development of computer technology, automatic control technology, information technology, and the increasing application of various forms of electronic systems, this system has been widely used in many industrial sectors and factories with considerable scale and complexity. The working voltage is only a few volts, and the current is on the order of microamps to milliamperes. Lightning phenomena that are common in nature and complex on-site interference signals can easily cause data loss, damage electronic system equipment, and cause serious accidents such as interruption of the entire control system and shutdown of the factory. . [0003] In order to prevent lightning interference, isolators and surge protectors will be added to the electronic system, but at pre...

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Problems solved by technology

[0002] With the development of computer technology, automatic control technology, information technology, and the increasing application of various forms of electronic systems, this system has been widely used in many industrial sectors and factories with considerable scale and complexity. The working voltage is only a few volts, and the current is on the order of microamps to milliamperes. Lightning phenomena that are common in nature and complex on-site interference signals can easily cause data loss, damage electronic system equipment, and cause serious accidents such as interruption of the entire control system and shutdown of the factory.

[0003] In order to prevent lightning interference, isolators and surge protectors will be added to the electronic system, but at present, the isolators and surge protectors provided by most manufacturers are designed separately, and the surge protectors are in parallel structure Yes, this structure cannot eliminate residual pressure and cannot be detected online

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