CN204681415U - RS485 intelligence junction box - Google Patents
RS485 intelligence junction box Download PDFInfo
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- CN204681415U CN204681415U CN201520447093.2U CN201520447093U CN204681415U CN 204681415 U CN204681415 U CN 204681415U CN 201520447093 U CN201520447093 U CN 201520447093U CN 204681415 U CN204681415 U CN 204681415U
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- 230000001052 transient effect Effects 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 3
- 206010003830 Automatism Diseases 0.000 abstract description 5
- 238000002955 isolation Methods 0.000 abstract description 5
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 102100028680 Protein patched homolog 1 Human genes 0.000 description 2
- 101710161390 Protein patched homolog 1 Proteins 0.000 description 2
- 102100036894 Protein patched homolog 2 Human genes 0.000 description 2
- 101710161395 Protein patched homolog 2 Proteins 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model proposes a kind of RS485 intelligence junction box, comprise master 485 chip and multiple from 485 chips, described master and slave 485 chips all adopt model to be the chip of SN65HVD3082, and the receiver output pin of described master 485 chip is connected with the drive data input pin from 485 chips respectively; The described receiver output pin from 485 chips is connected through the drive data input pin of analog switch with main 485 chips respectively, the described receiver output pin from 485 chips is also connected with single-chip microcomputer respectively, and described single-chip microcomputer is also connected with analog switch and loud speaker respectively; Described single-chip microcomputer adopts model to be the chip of STC12C2052.RS485 intelligence junction box involved by the utility model can realize the automatism isolation of fault branch.
Description
Technical field
The utility model relates to power domain, particularly relates to a kind of RS485 intelligence junction box.
Background technology
RS485 bus sends and differential received based on balance, has stronger anti-common mode disturbances ability, is widely used in the communications field.In electric power system, when power information is gathered, normally local data acquisition terminal is connected by RS485 bus with electric energy meter, realizes the collection of information.But when being connected from different electric energy meter by same data collection station, if communication fault appears in one of them electric energy meter, then whole communication line can be caused to paralyse.
Utility model content
In order to solve the problem, the utility model proposes a kind of RS485 intelligence junction box, to realize the automatism isolation of fault branch.
To achieve these goals, the utility model proposes a kind of RS485 intelligence junction box, comprise master 485 chip and multiple from 485 chips, described master and slave 485 chips all adopt model to be the chip of SN65HVD3082, and the receiver output pin of described master 485 chip is connected with the drive data input pin from 485 chips respectively; The described receiver output pin from 485 chips is connected through the drive data input pin of analog switch with main 485 chips respectively, the described receiver output pin from 485 chips is also connected with single-chip microcomputer respectively, and described single-chip microcomputer is also connected with analog switch and loud speaker respectively; Described single-chip microcomputer adopts model to be the chip of STC12C2052.
Preferably, from described master, the first transient voltage suppressor ground connection is drawn from the A pin of 485 chips, the 3rd transient voltage suppressor ground connection is drawn from B pin, at A, the second transient voltage suppressor is also connected between B two pins, the first thermistor is drawn from one end of the second transient voltage suppressor, the second thermistor is drawn from the other end of the second transient voltage suppressor, the first anti-thunder tube ground connection is drawn from described first thermistor, the 3rd anti-thunder tube ground connection is drawn from described second thermistor, also draw wire respectively from above-mentioned two thermistors and connect the second anti-thunder tube.
Preferably, the drive data input pin DI extraction wire of described master 485 chip connects the negative pole of the first resistance and diode respectively, the other end of described first resistance is connected to the positive pole of described diode and one end of the first electric capacity respectively, the other end ground connection of described first electric capacity, the positive pole of described diode is also connected to DE pin and the/RE pin of described master 485 chip through not gate.
Preferably, described not gate adopts model to be the chip of 74AHC1G04.
The beneficial effect of the program of the present utility model is that the zero propagation that above-mentioned RS485 intelligence junction box can realize transceiving data is changed automatically, the automatism isolation of fault branch and have lightening surge preventing function, star can connect up simultaneously, extend the communication distance of RS485.
Accompanying drawing explanation
Fig. 1 shows the principle schematic of the RS485 intelligence junction box involved by the utility model.
Fig. 2 shows the lightening surge preventing protective circuit schematic diagram involved by the utility model.
Fig. 3 shows the automatic transceiving change-over circuit schematic diagram involved by the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described.
As shown in Figure 1, RS485 intelligence junction box involved by the utility model comprises master 485 chip 1 and multiple from 485 chips, be described from 485 chips for four in the present embodiment, described master and slave 485 chips all adopt model to be the chip of SN65HVD3082.When sending signal from host computer A to slave computer (namely electric energy meter B1 ~ B4), the receiver output pin RO of described master 485 chip 1 is connected with the drive data input pin DI from 485 chips respectively; When sending signal from slave computer to host computer A, the described receiver output pin RO from 485 chips is connected through the drive data input pin DI of analog switch 3 with main 485 chips 1 respectively, the described receiver output pin RO from 485 chips is also connected with single-chip microcomputer 4 respectively, and described single-chip microcomputer 4 is also connected with analog switch 3 and loud speaker 5 respectively.Wherein said single-chip microcomputer 4 adopts model to be the chip of STC12C2052.
In the concrete course of work, described RS485 intelligence junction box is connected with host computer A and electric energy meter B1 ~ B4 by 485 buses, described master 485 chip 1 is utilized to convert the differential signal from host computer A to Transistor-Transistor Logic level, then with broadcast mode distribute to each branch road from 485 chips 21 ~ 24, more above-mentioned Transistor-Transistor Logic level is converted to differential signal from 485 chips 21 ~ 24 be sent to each branch 485 bus by described.Described RS485 intelligence junction box serves repeater and extends distance and expand the effect of terminal quantity.For four road junction boxs, its four branch bus respectively by serial mode wiring, can be equivalent to original one group of bus to divide into four groups by star-like mode, solve the limitation of wiring.When slave computer transmits data to host computer A, these data can first be sent in described single-chip microcomputer 4, described single-chip microcomputer 4 can monitor these data, judge whether to there is fault according to these data, when a certain branch road breaks down, the analog switch 3 that described single-chip microcomputer 4 can trigger on this branch road disconnects, and triggers described loud speaker 5 simultaneously and sends alarm signal, realize the automatism isolation function of fault branch.
RS485 intelligence junction box involved by the utility model also has lightening surge preventing function, concrete protective circuit schematic diagram as shown in Figure 2, from described master, the first transient voltage suppressor TVS1 ground connection is drawn from the A pin of 485 chips, the 3rd transient voltage suppressor TVS3 ground connection is drawn from B pin, at A, the second transient voltage suppressor TVS2 is also connected between B two pins, the first thermistor PTC1 is drawn from one end of the second transient voltage suppressor TVS2, the second thermistor PTC2 is drawn from the other end of the second transient voltage suppressor TVS2, the first anti-thunder tube Q1 ground connection is drawn from described first thermistor PTC1, the 3rd anti-thunder tube Q3 ground connection is drawn from described second thermistor PTC2, two thermistors are also drawn wire respectively and are connected the second anti-thunder tube Q2.The egress bus of all 485 chips all adopts anti-thunder tube and TVS pipe to form two class protection.When bus senses the high pressure macro-energy signals such as thunderbolt; lightning protection function between the line line first provided by anti-thunder tube, between line ground; Lightning Over-voltage is released rapidly; the Transient Currents produced in process of releasing can induce a peak voltage in circuit; above-mentioned peak voltage can absorb by the TVS pipe that Subloop Protect uses; if there is larger electric current, step-down can be carried out by the high value of thermistor.
RS485 intelligence junction box involved by the utility model also has automatic transceiving translation function, concrete automatic transceiving change-over circuit principle as shown in Figure 3, the drive data input pin DI extraction wire of described master 485 chip 1 connects the negative pole of the first resistance R1 and diode D1 respectively, the other end of described first resistance R1 is connected to the positive pole of described diode D1 and one end of the first electric capacity C1 respectively, the other end ground connection of described first electric capacity C1, the positive pole of described diode D1 is also connected to DE pin and the/RE pin of described master 485 chip 1 through not gate N.Described not gate N adopts model to be the chip of 74AHC1G04.So just can utilize drive data input pin DI control DE pin and the/RE pin of described master 485 chip 1.
The zero propagation that RS485 intelligence junction box involved by the utility model can realize transceiving data is changed automatically, the automatism isolation of fault branch and have lightening surge preventing function, simultaneously can star wiring, extends the communication distance of RS485.
Claims (4)
1. a RS485 intelligence junction box, it is characterized in that: comprise master 485 chip and multiple from 485 chips, described master and slave 485 chips all adopt model to be the chip of SN65HVD3082, and the receiver output pin of described master 485 chip is connected with the drive data input pin from 485 chips respectively; The described receiver output pin from 485 chips is connected through the drive data input pin of analog switch with main 485 chips respectively, the described receiver output pin from 485 chips is also connected with single-chip microcomputer respectively, and described single-chip microcomputer is also connected with analog switch and loud speaker respectively; Described single-chip microcomputer adopts model to be the chip of STC12C2052.
2. RS485 intelligence junction box according to claim 1, it is characterized in that: from described master, the first transient voltage suppressor ground connection is drawn from the A pin of 485 chips, the 3rd transient voltage suppressor ground connection is drawn from B pin, at A, the second transient voltage suppressor is also connected between B two pins, the first thermistor is drawn from one end of the second transient voltage suppressor, the second thermistor is drawn from the other end of the second transient voltage suppressor, the first anti-thunder tube ground connection is drawn from described first thermistor, the 3rd anti-thunder tube ground connection is drawn from described second thermistor, also draw wire respectively from above-mentioned two thermistors and connect the second anti-thunder tube.
3. RS485 intelligence junction box according to claim 1, it is characterized in that: the drive data input pin DI extraction wire of described master 485 chip connects the negative pole of the first resistance and diode respectively, the other end of described first resistance is connected to the positive pole of described diode and one end of the first electric capacity respectively, the other end ground connection of described first electric capacity, the positive pole of described diode is also connected to DE pin and the/RE pin of described master 485 chip through not gate.
4. RS485 intelligence junction box according to claim 3, is characterized in that: described not gate adopts model to be the chip of 74AHC1G04.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520447093.2U CN204681415U (en) | 2015-06-26 | 2015-06-26 | RS485 intelligence junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520447093.2U CN204681415U (en) | 2015-06-26 | 2015-06-26 | RS485 intelligence junction box |
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| Publication Number | Publication Date |
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| CN204681415U true CN204681415U (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520447093.2U Expired - Fee Related CN204681415U (en) | 2015-06-26 | 2015-06-26 | RS485 intelligence junction box |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452799A (en) * | 2016-09-09 | 2017-02-22 | 深圳市中科智诚科技有限公司 | Anti-surge concentrator for network communication engineering |
| CN110176136A (en) * | 2019-06-25 | 2019-08-27 | 中国科学院新疆理化技术研究所 | A method of 485 communications under nuclear radiation environment |
| CN112987618A (en) * | 2021-03-25 | 2021-06-18 | 镇江中煤电子有限公司 | 485 communication circuit of sensor of coal mine safety monitoring system |
-
2015
- 2015-06-26 CN CN201520447093.2U patent/CN204681415U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452799A (en) * | 2016-09-09 | 2017-02-22 | 深圳市中科智诚科技有限公司 | Anti-surge concentrator for network communication engineering |
| CN110176136A (en) * | 2019-06-25 | 2019-08-27 | 中国科学院新疆理化技术研究所 | A method of 485 communications under nuclear radiation environment |
| CN112987618A (en) * | 2021-03-25 | 2021-06-18 | 镇江中煤电子有限公司 | 485 communication circuit of sensor of coal mine safety monitoring system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20170626 |