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RS485 bus short circuit isolator

A RS485, isolator technology, applied in the field of communication, can solve problems such as short circuit and communication failure, and achieve the effect of increasing transmission distance, increasing load capacity, and increasing anti-interference ability

Inactive Publication Date: 2010-11-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of communication failure caused by the short circuit of a certain branch of the fire protection network based on the RS485 bus, the present invention provides an RS485 bus short circuit isolator

Method used

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  • RS485 bus short circuit isolator
  • RS485 bus short circuit isolator
  • RS485 bus short circuit isolator

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Experimental program
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specific Embodiment approach 1

[0017] Specific implementation mode one: according to the instructions attached figure 1 and 2 Describe this embodiment in detail, a kind of RS485 bus short-circuit isolator described in this embodiment, it comprises first electrical interface 11, passive signal short-circuit automatic isolation module 13 and second electrical interface 12, described passive signal short-circuit automatic The isolation module 13 includes a drive trigger unit 13-1, a switch drive unit 13-2 and an RS485 bus switch module 13-3,

[0018] The signal communication end of the first electrical interface 11 is connected with the signal input end of the drive trigger unit 13-1 and the first signal communication end of the RS485 bus switch module 13-3 at the same time, and the signal output end of the drive trigger unit 13-1 is connected with the first signal communication end of the RS485 bus switch module 13-3. The signal input end of switch drive unit 13-2 is connected, the signal output end of descr...

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that this embodiment also includes a voltage stabilized power supply module 14 and a first lightning protection and surge protection module 9, the first lightning protection and surge protection module The first signal communication end of 9 is connected to the signal communication end of the first electrical interface 11, and the second signal communication end of the first lightning protection and surge protection module 9 is simultaneously connected to the signal input end of the drive trigger unit 13-1 and the RS485 The first signal communication end of the bus switch module 13 - 3 is connected, and the power output end of the stabilized power supply module 14 is connected to the power input end of the first lightning protection and surge protection module 9 .

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that this embodiment also includes a second lightning protection and surge protection module 10, and the first lightning protection and surge protection module 10 of the second The signal communication end is connected to the second signal communication end of the RS485 bus switch module 13-3, the second signal communication end of the second lightning protection and surge protection module 10 is connected to the signal communication end of the second electrical interface 12, and the voltage is stabilized The power output end of the power supply module 14 is also connected to the power input end of the second lightning and surge protection module 10 .

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Abstract

The invention discloses an RS485 bus short circuit isolator, which relates to the technical field of communication and solves the problem of short circuit isolation among branches of common RS485 bus-based firefighting. The RS485 bus short circuit isolator comprises a first electrical interface, a short circuit automatic isolating module of a passive signal and a second electrical interface, wherein the short circuit automatic isolating module of the passive signal comprises a drive trigger unit, a switch drive unit and an RS485 bus switch unit. The RS485 bus short circuit isolator can also adopt the following structure that: the isolator comprises the first electrical interface, an active front end data transceiver module, an active rear end data transceiver module, an automatic transceiver control module, the second electrical interface and a voltage-stabilizing power supply module. The invention is applied to an RS485 bus firefighting network.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an RS485 bus short-circuit isolator. Background technique [0002] At present, in the RS485 bus network, when a branch is short-circuited, the entire bus network will be short-circuited, causing communication failure of other branches. In addition, during long-distance industrial wiring, the devices on the RS485 bus are very vulnerable to lightning strikes , due to factors such as accumulated charge, potential difference, and surge voltage. Contents of the invention [0003] In order to solve the problem of communication failure caused by the short-circuit of a certain branch of the commonly used RS485 bus-based fire protection network, all branches of the entire bus network are short-circuited, and the present invention provides an RS485 bus short-circuit isolator. [0004] An RS485 bus short-circuit isolator of the present invention comprises a first electrical interfa...

Claims

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Application Information

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IPC IPC(8): H04L12/40H04L12/24
Inventor 王建民马宁张爱民殷景华曹一江桂太龙
Owner HARBIN UNIV OF SCI & TECH
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