Remotely-controlled electronic equipment on-off device

Abstract

The invention discloses a remotely-controlled electronic equipment on-off device. A single chip microcomputer in a microcontroller unit is externally connected with an oscillating circuit, a system programming connector and the like, an interrupt signal input port triggered by electric level downward transition, a recommend standard 232 (RS232) serial communication port and an output port are programmed at a programmable input / output (I / O) port of the single chip microcomputer, the RS232 serial communication port is connected with an Ethernet conversion serial communication module in an Ethernet communication interface circuit, the output port is respectively connected with a power supply control relay and a driving circuit of a communication control relay, a power supply control relay with a four-open and four-close contact point and a communication control relay are respectively in serial connection in front of a power line lightning protector of electronic equipment and Ethernet data line lightning protector of the electronic equipment, and the interrupt signal input port programmed to be triggered by electric level downward transition is connected with an output end of a thunder and lightning surge voltage real-time detection unit. Direct-current power required by internal circuits in the remotely-controlled electronic equipment on-off device can be provided by an alternating-current conversion circuit.

Description

technical field [0001] The invention relates to a disconnecting device for electronic equipment that realizes remote control through a 10BASE-T / 100BASE-TX communication network, and belongs to the technical field of electronic control devices. Background technique [0002] In the current remote-controlled electronic equipment, such as electronic surveillance cameras, the lightning protection scheme is passive, and is connected in series to the Ethernet data line lightning protector at the data line entrance close to the electronic equipment; The power inlet is connected in series to the power line surge protector. When the external lines connected to electronic equipment are invaded by lightning surges, because the line-ground voltage and line-line voltage borne by the data line lightning arrester and power line lightning arrester exceed their protection thresholds, within a few nanoseconds of response time Inside, the protection element (gas discharge tube, or zinc oxide v...

AI Technical Summary

Problems solved by technology

However, there are three problems in the above-mentioned passive protection method. One is that when the lightning surge energy is too large, it exceeds the discharge capacity that the protective components in the lightning arrester can withstand, resulting in the failure of the lightning protection protection; The lightning surge voltage is slightly lower than the protection threshold of the lightning arrester and lasts for a long time. Since the protection element in the lightning arrester cannot change from the cut-off state to the conduction state, the internal electronic components of the protected camera are subjected to a higher voltage and fail. Breakdown damage; the third is that after the protection components in the lightning arrester have been subjected to multiple lightning surge actions, due to the performance degradation or even failure of the lightning protection protection components, the line cannot play its due protective role when the line is subjected to lightning surges again

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