CN107948034A - One kind is based on RS485 bus communication terminal systems - Google Patents
One kind is based on RS485 bus communication terminal systems Download PDFInfo
- Publication number
- CN107948034A CN107948034A CN201711179309.1A CN201711179309A CN107948034A CN 107948034 A CN107948034 A CN 107948034A CN 201711179309 A CN201711179309 A CN 201711179309A CN 107948034 A CN107948034 A CN 107948034A
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- CN
- China
- Prior art keywords
- level
- bus
- isolation
- transceiver
- conversion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40013—Details regarding a bus controller
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
Abstract
The invention discloses one kind to be based on RS485 bus communication terminal systems, which is made of MCU controllers, isolation and level conversion, transceiver three parts.MCU controllers are responsible for the transmitting-receiving of data and the control of transceiver, and isolation and level conversion realize that electrical isolation between MCU controllers and transceiver and MCU controller level conversions, transceiver realize the conversion of RS485 level and Transistor-Transistor Logic level；Prevent bus short circuit from burning bus port using the fast fuse that recovers in RS485 bus ends, absorb overcurrent and overvoltage with varistor and transient diode.The present invention designs a kind of RS485 bus terminations, using the AMD2582E with Magnetic isolation technology as bus control unit, Phototube Coupling and level translation technology is used between microcontroller and bus control unit, realizes conversion and the signal isolation of varying level.
Description
Technical field
The present invention relates to intelligent communication field, is specifically that one kind is based on RS485 bus communication terminal systems.
Background technology
RS485 buses are widely used in industry spot since its wiring is simple, reliable and stable, but industry spot is done
Disturb source and its enrich, be the reliability of safeguards system, bus termination is needed using multiple isolation such as Phototube Coupling, electromagnetic isolation etc.
A variety of interference protection measures, while protection of the bus termination in terms of overvoltage, lightning Protection is further contemplated, present communicating terminal is prevented
Shield and stability are bad.
The content of the invention
It is an object of the present invention to provide a kind of simple structure, and wiring is simple, reliable and stable based on RS485 bus communication terminals
System.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
One kind is based on RS485 bus communication terminal systems, and the terminal system is by MCU controllers, isolation and level conversion, receipts
Send out device three parts composition.
MCU controllers are responsible for the transmitting-receiving of data and the control of transceiver, and isolation realizes MCU controllers with receiving with level conversion
Electrical isolation and MCU controller level conversions, transceiver between hair device realize the conversion of RS485 level and Transistor-Transistor Logic level；
RS485 bus ends prevent bus short circuit from burning bus port using the fast fuse that recovers, and are inhaled with varistor and transient diode
Receive overcurrent and overvoltage.
Preferably, the MCU controllers use STC15L2K60S microcontrollers, which uses 3.3V low-power dissipation systems
Design, has the function of serial ports online programming.
Preferably, the ADM2582E, wherein comprising integrated form isolation DC D/C power, integrated in single package
One triple channel isolator, a tri-state differential line driver, Differential Input receiver and DC DC conversions
Device, the device are powered using 5V or 3.3V single supplies, and ADM2582E drivers effectively enable circuit with a high level, and
One high level receiver can also be provided and effectively disable circuit, receiver output can be made to enter high impedance status.
The beneficial effects of the invention are as follows：
The present invention designs a kind of RS485 bus terminations, using the AMD2582E with Magnetic isolation technology as bus marco
Device, uses Phototube Coupling and level translation technology between microcontroller and bus control unit, realize conversion and the signal of varying level
Isolation.
Brief description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is based on RS485 bus communication terminal system principle schematics for the present invention.
Fig. 2 is based on RS485 bus communication terminal system circuit diagrams for the present invention.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
As shown in Figs. 1-2, a kind of to be based on RS485 bus communication terminal systems, the terminal system is by M CU controllers, isolation
Formed with level conversion, transceiver three parts.
MCU controllers are responsible for the transmitting-receiving of data and the control of transceiver, and isolation realizes MCU controllers with receiving with level conversion
Electrical isolation and MCU controller level conversions, transceiver between hair device realize the conversion of RS485 level and Transistor-Transistor Logic level；
RS485 bus ends prevent bus short circuit from burning bus port using the fast fuse that recovers, and are inhaled with varistor and transient diode
Receive overcurrent and overvoltage.
Preferably, the MCU controllers use STC15L2K60S microcontrollers, which uses 3.3V low-power dissipation systems
Design, has the function of serial ports online programming.
Preferably, the ADM2582E, wherein comprising integrated form isolation DC D/C power, integrated in single package
One triple channel isolator, a tri-state differential line driver, Differential Input receiver and DC DC conversions
Device, the device are powered using 5V or 3.3V single supplies, and ADM2582E drivers effectively enable circuit with a high level, and
One high level receiver can also be provided and effectively disable circuit, receiver output can be made to enter high impedance status.
The embodiments of the present invention described above are not intended to limit the scope of the present invention.It is any in the present invention
Spirit and principle within the modifications, equivalent substitutions and improvements made etc., should be included in the claim protection model of the present invention
Within enclosing.
Claims (3)
1. one kind is based on RS485 bus communication terminal systems, it is characterised in that：
The terminal system is made of MCU controllers, isolation and level conversion, transceiver three parts；
MCU controllers are responsible for the transmitting-receiving of data and the control of transceiver, and isolation realizes MCU controllers and transceiver with level conversion
Between electrical isolation and MCU controller level conversions, transceiver realize the conversion of RS485 level and Transistor-Transistor Logic level；In RS485
Bus end prevents bus short circuit from burning bus port using the fast fuse that recovers, and absorbs electricity with varistor and transient diode
Stream and overvoltage.
2. RS485 bus communication terminal systems are based on according to claim 1, it is characterised in that the MCU controllers use
STC15L2K60S microcontrollers, the microcontroller are designed using 3.3V low-power dissipation systems, have the function of serial ports online programming.
3. RS485 bus communication terminal systems are based on according to claim 2, it is characterised in that the ADM2582E, wherein
Comprising integrated form isolation DC D/C power, a triple channel isolator, a tri-state differential lines are integrated with single package
Road driver, a Differential Input receiver and DC DC converters, which is powered using 5V or 3.3V single supplies,
ADM2582E drivers can also provide a high level receiver and effectively prohibit with the effectively enabled circuit of a high level
With circuit, receiver output can be made to enter high impedance status.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711179309.1A CN107948034A (en) | 2017-11-23 | 2017-11-23 | One kind is based on RS485 bus communication terminal systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711179309.1A CN107948034A (en) | 2017-11-23 | 2017-11-23 | One kind is based on RS485 bus communication terminal systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107948034A true CN107948034A (en) | 2018-04-20 |
Family
ID=61930825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711179309.1A Pending CN107948034A (en) | 2017-11-23 | 2017-11-23 | One kind is based on RS485 bus communication terminal systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107948034A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180813A (en) * | 2020-10-22 | 2021-01-05 | 湖南中车时代通信信号有限公司 | Hard wire synchronous processing device and control system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203535635U (en) * | 2013-11-14 | 2014-04-09 | 济南大学 | RS232 communication circuit |
| CN206117132U (en) * | 2016-07-15 | 2017-04-19 | 安徽南瑞继远电网技术有限公司 | Leakage current protector circuit based on ARM platform |
| CN107070445A (en) * | 2017-03-22 | 2017-08-18 | 广州致远电子股份有限公司 | A kind of serial communication interface function switching circuit and method |
-
2017
- 2017-11-23 CN CN201711179309.1A patent/CN107948034A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203535635U (en) * | 2013-11-14 | 2014-04-09 | 济南大学 | RS232 communication circuit |
| CN206117132U (en) * | 2016-07-15 | 2017-04-19 | 安徽南瑞继远电网技术有限公司 | Leakage current protector circuit based on ARM platform |
| CN107070445A (en) * | 2017-03-22 | 2017-08-18 | 广州致远电子股份有限公司 | A kind of serial communication interface function switching circuit and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180813A (en) * | 2020-10-22 | 2021-01-05 | 湖南中车时代通信信号有限公司 | Hard wire synchronous processing device and control system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180420 |
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| RJ01 | Rejection of invention patent application after publication |