Matrix type multifunctional signal isolation transmitter

Abstract

The invention relates to a matrix type multifunctional signal isolation transmitter, and belongs to the technical field of signal isolation transmission. The transmitter comprises a signal isolation acquisition unit array, an internal digital signal isolation unit array and a signal isolation conversion unit array, the signal isolation acquisition unit is responsible for acquiring an analog inputsignal, converting the analog input signal into a digital value and providing an external isolation digital communication interface; the signal isolation conversion unit is responsible for generatingan analog output signal according to the digital value and providing an external isolation digital communication interface; and the internal digital signal isolation unit array is responsible for internal isolation communication of each signal isolation acquisition unit and each signal isolation conversion unit. According to the matrix type multifunctional signal isolation transmitter, point-to-point transmission, point-to-multipoint transmission, multipoint-to-point transmission and multipoint-to-multipoint transmission from input signals to output signals can be achieved, normal work can beachieved without an independent power supply, and the matrix type multifunctional signal isolation transmitter is simple in circuit structure, easy to integrate and convenient to produce.

Description

technical field [0001] The invention relates to the field of signal isolation, in particular to a matrix multifunctional signal isolation transmitter. Background technique [0002] In many current industrial sites and laboratories, data transmission between multiple devices is involved, and many linear data are usually transmitted by 4~20mA DC current. In order to avoid mutual interference between two devices, generally Use a 4~20mA signal isolator for isolation. However, the signal isolators currently on the market generally have the following problems: [0003] 1. Using expensive isolation devices, the price is generally high; [0004] 2. The isolation circuit used has an isolated power supply, and the isolated power supply circuit not only increases the cost, but also occupies a large PCB area, resulting in a generally large size of the signal isolator, which is not conducive to integration; [0005] 3. The function is relatively single, and the scope of application of...

AI Technical Summary

Problems solved by technology

[0003] 1. Using expensive isolation devices, the price is generally high;

[0004] 2. The isolation circuit used has an isolated power supply, and the isolated power supply circuit not only increases the cost, but also occupies a large PCB area, resulting in a generally large size of the signal isolator, which is not conducive to integration;

[0005] 3. The function is relatively single, and the scope of application of a single product is narrow

[0007] 1. The 4~20mA signal multi-function isolation transmitter mentioned in the patent ZL201821089454.0 has a narrow application range of output temperature and a large temperature drift;

[0008] 2. The patent ZL201821089455.5 is only applicable to the occasion of converting analog signal to digital signal;

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