Lightning protection interface design of serial communication interface of secondary instrument
A technology of serial communication and interface design, applied in the direction of logic circuit interface device, logic circuit connection/interface layout, contact components, etc., can solve the problems of unstable and unreliable data transmission of serial communication interface, and ensure stability. , the effect of ensuring safety
Inactive Publication Date: 2019-11-26
HUNAN CHINA RESOURCES POWER LIYUJIANG CO LTD
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[0003] The purpose of the present invention is to provide a lightning protection interface design for the serial communication port of the secondary instrument, which solves the problem of the existing protection serial port equipment and serial interface equipment being damaged by lightning, and the unstable and unreliable data transmission of the serial communication interface. question
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[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0026] In implementation 1, see Figure 1-3 , a secondary instrument serial communication port lightning protection interface design, including instrument serial interface 1 and heat dissipation hole 15, the input end of instrument serial interface 1 is electrically connected to photoelectric isolator 2 through connection harness 4, and instrument serial The output end of interface 1 is electrically connected to the first surge protector 3. To achieve reliable...
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The invention discloses lightning protection interface design of a serial communication interface of a secondary instrument. An instrument serial interface and a heat dissipation hole are included; the input end of the instrument serial interface is electrically connected to a photoelectric isolator through connection wiring harness; and the output end of the instrument serial interface is electrically connected to a first surge protector. According to the lightning protection interface design of the serial communication interface of the secondary instrument in the invention, to realize reliable protection of the serial interface, the photoelectric isolator is needed; furthermore, lightning protection surge protection is also needed; due to dual protection, electric isolation of indoor andoutdoor serial interfaces can be realized; furthermore, outdoor lightening can be prevented; the interface mode using the isolator and the surge protector is very flexible; only the fact that the position, where the surge protector is connected, is positioned at one side outdoors is ensured; furthermore, the fact that the grounding position and the outdoor ground are connected together is considered; the design is suitable for all serial communication interfaces; the surge protector and grounding are flexibly increased on the serial interface and the photoelectric isolator; and thus, completeelectric isolation can be realized.
Description
technical field [0001] The invention relates to the technical field of a lightning protection device for a serial port of a secondary instrument, in particular to a design of a lightning protection interface for a serial communication port of a secondary instrument. Background technique [0002] Smart meters developed with the maturity of single-chip microcomputer technology in the early 1980s. Now the world's meter market is basically monopolized by smart meters. Networking communication interface. The key to realizing this technology is to ensure that the communication link is safe and reliable. Since the RS-485 standard has long-distance transmission (more than 1200 meters), the maximum transmission rate can reach 10Mbps, and high signal noise is printed. At the same time, the serial port circuit has the advantages of convenient control and low cost, making multi-point connection possible. Therefore, RS-485 becomes the intelligent standard communication interface. How...
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IPC IPC(8): H02H9/00H03K19/0175H01R4/66H01R13/03H02G3/04H05K5/02H05K5/03
CPCH02H9/005H03K19/017536H01R4/66H01R13/03H02G3/0462H05K5/0213H05K5/0234H05K5/0217H05K5/0226H05K5/03
Inventor 熊波
Owner HUNAN CHINA RESOURCES POWER LIYUJIANG CO LTD