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Universal serial bus-balanced voltage digital interface converter

A universal serial bus and balanced voltage technology, applied in the field of signal isolation, can solve the problem of easy breakdown of communication chips and achieve the effect of preventing burnout

Active Publication Date: 2013-01-02
ZHEJIANG HECHUAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a universal serial bus-balanced voltage digital interface converter to solve the problem that the communication chip in the PLC is easily broken down in the prior art

Method used

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  • Universal serial bus-balanced voltage digital interface converter
  • Universal serial bus-balanced voltage digital interface converter
  • Universal serial bus-balanced voltage digital interface converter

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Embodiment Construction

[0033] 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.

[0034] refer to figure 1 , figure 1 A structural schematic diagram of a universal serial bus-balanced voltage digital interface converter is shown.

[0035] The universal serial bus-balanced voltage digital interface converter includes: USB interface unit, USB-serial signal conversion unit, RS-422 signal processing unit and RS-422 interface, the above-mentioned converter also includes a signal isolation unit, the signal isolation unit is set Between the USB-...

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Abstract

The invention provides a universal serial bus-balanced voltage digital interface converter. The universal serial bus-balanced voltage digital interface converter comprises a USB interface unit, a USB-serial signal converting unit, an RS-422 signal processing unit, an RS-422 interface and a signal isolating unit. The signal isolating unit is arranged between the USB-serial signal converting unit and the RS-422 signal processing unit and used for electrically isolating a signal between the USB-serial signal converting unit and the RS-422 signal processing unit. By means of the technical isolation scheme, compared with the prior art and on the premise that a normal communication function and the signal transmission quality are guaranteed, the electrical connection between a computer and a programmable logic controller (PLC) on a signal transmission line is switched off, and accordingly the stoppage that a communication chip is burned down due to electricity leakage is completely eradicated.

Description

technical field [0001] The invention relates to the field of signal isolation, and more specifically relates to a universal serial bus-balanced voltage digital interface converter. Background technique [0002] PLC (Programmable Logic Controller, programmable logic controller) is a widely used industrial automation control equipment. It can process the signal input to the PLC, and send out the corresponding output signal according to the program stored in it to control the operation of the equipment. Because its program can be completely compiled by the user, PLC has strong flexibility. Therefore, whether it is in the automation of a single machine, the automation of the entire production line, or even the production automation of the entire factory, PLC plays an important role and is widely used. practical use. [0003] The most important feature of PLC is that it can be programmed by the user. Today’s PLC products use special software on a personal computer (PC) to progr...

Claims

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Application Information

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IPC IPC(8): G06F13/40
Inventor 鄢鹏飞
Owner ZHEJIANG HECHUAN TECH
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