CN202077043U - 485 communication system with strong anti-interference capability - Google Patents
485 communication system with strong anti-interference capability Download PDFInfo
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- CN202077043U CN202077043U CN2011201451490U CN201120145149U CN202077043U CN 202077043 U CN202077043 U CN 202077043U CN 2011201451490 U CN2011201451490 U CN 2011201451490U CN 201120145149 U CN201120145149 U CN 201120145149U CN 202077043 U CN202077043 U CN 202077043U
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Abstract
The utility model relates to a 485 communication system with strong anti-interference capability, which comprises a 485 communication chip U5, a triode Q1, a diode D3, a resistor R23, a resistor R24, a resistor R35, a resistor R31, a resistor R50, a resistor R54, a resistor R68, a resistor R72, a capacitor C18, a bilateral diode RV7, a bilateral diode RV8, a recoverable fuse F7, a recoverable fuse F8, a 3.3V power source and a 5V power source. Compared with the prior art, the 485 communication system with the strong anti-interference capability has the advantages of guaranteeing high reliability, effectively reducing damages to weak current equipment caused by lightning stroke, static electricity and electric surge and the like.
Description
Technical field
The utility model relates to a kind of 485 communication systems, especially relates to 485 strong communication systems of a kind of antijamming capability.
Background technology
Existing intelligent alarm building conversational system all belongs to weak electricity system, be subjected to strong magnetic easily, the damage of strong thunder and lightning, surge, static, cause very big economic loss, thunder and lightning can cause multiple multi-form harm, can prevent the harm of thunder and lightning without any a kind of way comprehensively, can only the degree of damage to crops caused by thunder can be dropped to minimum by various effective ways, in reality for many years people to the understanding of direct lightning strike, induction thunder, spherical thunder than higher, protect also perfect relatively, but relatively weak to the consciousness of self-protection of lightning surge and safeguard procedures.The harm of modal electronic equipment since direct stroke do not cause, but since current surge that thunderbolt is responded in power supply and communication line when taking place cause.On the one hand because electronic equipment internal structure height integrated (VLSI chip), equipment is withstand voltage, the level of anti-overcurrent descends thereby cause, ability to bear to thunder and lightning (comprising induction thunder and switching overvoltage surge) descends, because the signal source path increases, system is easier than before invaded by lightning wave on the other hand.Surge voltage can be scurried into electronic equipment from approach such as power line or holding wires, and it is most important therefore to design 485 perfect lightning protection communication systems.
The utility model content
The purpose of this utility model is exactly to provide 485 strong communication systems of a kind of antijamming capability for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions:
485 communication systems that a kind of antijamming capability is strong, it is characterized in that, comprise 485 communication chip U5, triode Q1, diode D3, resistance R 23, resistance R 24, resistance R 35, resistance R 31, resistance R 50, resistance R 54, resistance R 68, resistance R 72, capacitor C 18, bidirectional diode RV7, bidirectional diode RV8, can recover fuse F7, can recover fuse F8,3.3V power supply, 5V power supply;
Described triode Q1 comprises base stage, emitter, collector electrode, and its base stage is connected with resistance R 23, and described emitter is connected with the 3.3V power supply, and its collector electrode is connected with 485 communication chip U5 by resistance R 35;
Described resistance R 24 1 end ground connection, the other end is connected with 485 communication chip U5;
The positive pole of described diode D3 is connected with the 3.3V power supply by resistance R 31, and the negative pole of described diode D3 is connected with 485 communication chip U5;
Described 485 communication chip U5 are connected with the 5V power supply, and described capacitor C 18 1 terminates between 485 communication chip U5 and the 5V power supply, other end ground connection;
Described 485 communication chips by resistance R 54 with can recover fuse F7 and be connected, described 485 communication chips by resistance R 72 with can recover fuse F8 and be connected;
Described resistance R 50 1 terminates between 485 communication chips and the resistance R 54, and the other end is connected with the 5V power supply;
Described resistance R 68 1 terminates between 485 communication chips and the resistance R 72, other end ground connection;
Described bidirectional diode RV7 one terminates at resistance R 54 and can recover between the fuse F7 other end ground connection;
Bidirectional diode RV8 one terminates at resistance R 72 and can recover between the fuse F8 other end ground connection.
Described 485 communication chip U5 are 485 communication chips of SP3082 series.
Described diode D3 is a transient voltage suppression diode.
Described bidirectional diode RV7, bidirectional diode RV8 are bidirectional transient voltage and suppress diode.
Compared with prior art, the utlity model has comprehensive safeguard function, all carried out effective protection in chip level and circuit aspect, can guarantee high reliability and effectively reduce thunderbolt, static, surge infringement, thereby improve the antijamming capability of chip and prolonged useful life weak current equipment.
Description of drawings
Fig. 1 is the electrical block diagram of the utility model importation;
Fig. 2 is the electrical block diagram of the utility model output.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
As shown in Figure 1 and Figure 2,485 communication systems that a kind of antijamming capability is strong comprise 485 communication chip U5, triode Q1, diode D3, resistance R 23, resistance R 24, resistance R 35, resistance R 31, resistance R 50, resistance R 54, resistance R 68, resistance R 72, capacitor C 18, bidirectional diode RV7, bidirectional diode RV8, can recover fuse F7, can recover fuse F8,3.3V power supply, 5V power supply;
Described triode Q1 comprises base stage, emitter, collector electrode, and its base stage is connected with resistance R 23, and described emitter is connected with the 3.3V power supply, and its collector electrode is connected with 485 communication chip U5 by resistance R 35; Described resistance R 24 1 end ground connection, the other end is connected with 485 communication chip U5; The positive pole of described diode D3 is connected with the 3.3V power supply by resistance R 31, and the negative pole of described diode D3 is connected with 485 communication chip U5; Described 485 communication chip U5 are connected with the 5V power supply, and described capacitor C 18 1 terminates between 485 communication chip U5 and the 5V power supply, other end ground connection; Described 485 communication chips by resistance R 54 with can recover fuse F7 and be connected, described 485 communication chips by resistance R 72 with can recover fuse F8 and be connected; Described resistance R 50 1 terminates between 485 communication chips and the resistance R 54, and the other end is connected with the 5V power supply; Described resistance R 68 1 terminates between 485 communication chips and the resistance R 72, other end ground connection; Described bidirectional diode RV7 one terminates at resistance R 54 and can recover between the fuse F7 other end ground connection; Bidirectional diode RV8 one terminates at resistance R 72 and can recover between the fuse F8 other end ground connection.
SP3082 family chip and unique circuit design that described 485 communication chip U5 adopt U.S. Sipex company to produce comprehensively improve intelligent intercommunication reliability of products, with the damage of reply thunder and lightning, static, surge, reduce the maintenance cost of system to integral device
SP3082 has following main feature:
SP3082 has 485 senior safety guarantee communication chips; have ± the 15kV esd protection; the 1/8th unit load; support 256 receivers on a bus; controllable transmission rate swing, receiver fail safe, short-circuit protection, open circuit protection, pulse input protection, overheat protective function; anti-surge, antistatic have guaranteed the normal use under harsh environment for use.
Described diode D3 is a transient voltage suppression diode.
Described bidirectional diode RV7, bidirectional diode RV8 are bidirectional transient voltage and suppress diode.
The utility model adopts duplicate protection, in the circuit design aspect, mainly is transient state (transition) voltage inhibition diode to be arranged and can recover fuse 30V900mA in the design of signal leading portion; Mainly adopt SP3082 lightning protection 485 communication chips in chip level;
Transient voltage suppression diode is called for short the TVS device; under the applied in reverse condition of regulation; when bearing a high-octane instantaneous overvoltage pulse; its working impedance can be reduced to very low conduction value immediately; allow big electric current to pass through; and with voltage clamping to predeterminated level, thereby protect the precision components in the electronic circuit to avoid damaging effectively.The transient pulse power that TVS can bear can reach kilowatt, and its clamp response time only is 1ps (10-12S).The surge forward current that TVS allows under the T=10ms condition, can reach 50～200A at TA=250C.
Two-way TVS can absorb instantaneous big pulse power at positive and negative both direction, and voltage clamping is arrived predeterminated level, and two-way TVS is applicable to alternating current circuit, and unidirectional TVS generally is used for DC circuit.
Can recover fuse is to be processed into through special process by high-tech polymer resin and conductive nano crystal grain, and under the normal condition, the conductive nano crystal forms chain conductive path, fuse operate as normal with the resin-based link; When circuit is short-circuited or transships; the big electric current of fuse of flowing through makes its collection temperature rise; when reaching Curie temperature; its density of states reduces rapidly, and phase transformation increases, and inner electrically conductive links is change of snowslide attitude or fracture; fuse is phase step type and adjourns high-impedance state; electric current is by rapid pinch off, thereby circuit is carried out fast, limits accurately and protects; its small electric current makes fuse be in guard mode always; after outage and fault eliminating, its collection temperature drop is low, and the density of states increases; phase transformation is restored; nanocrystal is reduced into the chain conductive path, and resettable fuse reverts to normal condition, need not artificial replacing.
Claims (4)
1. 485 communication systems that antijamming capability is strong, it is characterized in that, comprise 485 communication chip U5, triode Q1, diode D3, resistance R 23, resistance R 24, resistance R 35, resistance R 31, resistance R 50, resistance R 54, resistance R 68, resistance R 72, capacitor C 18, bidirectional diode RV7, bidirectional diode RV8, can recover fuse F7, can recover fuse F8,3.3V power supply, 5V power supply;
Described triode Q1 comprises base stage, emitter, collector electrode, and its base stage is connected with resistance R 23, and described emitter is connected with the 3.3V power supply, and its collector electrode is connected with 485 communication chip U5 by resistance R 35;
Described resistance R 24 1 end ground connection, the other end is connected with 485 communication chip U5;
The positive pole of described diode D3 is connected with the 3.3V power supply by resistance R 31, and the negative pole of described diode D3 is connected with 485 communication chip U5;
Described 485 communication chip U5 are connected with the 5V power supply, and described capacitor C 18 1 terminates between 485 communication chip U5 and the 5V power supply, other end ground connection;
Described 485 communication chips by resistance R 54 with can recover fuse F7 and be connected, described 485 communication chips by resistance R 72 with can recover fuse F8 and be connected;
Described resistance R 50 1 terminates between 485 communication chips and the resistance R 54, and the other end is connected with the 5V power supply;
Described resistance R 68 1 terminates between 485 communication chips and the resistance R 72, other end ground connection;
Described bidirectional diode RV7 one terminates at resistance R 54 and can recover between the fuse F7 other end ground connection;
Bidirectional diode RV8 one terminates at resistance R 72 and can recover between the fuse F8 other end ground connection.
2. 485 communication systems that a kind of antijamming capability according to claim 1 is strong is characterized in that, described 485 communication chip U5 are 485 communication chips of SP3082 series.
3. 485 communication systems that a kind of antijamming capability according to claim 1 is strong is characterized in that, described diode D3 is a transient voltage suppression diode.
4. 485 communication systems that a kind of antijamming capability according to claim 1 is strong is characterized in that, described bidirectional diode RV7, bidirectional diode RV8 are bidirectional transient voltage and suppress diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201451490U CN202077043U (en) | 2011-05-09 | 2011-05-09 | 485 communication system with strong anti-interference capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201451490U CN202077043U (en) | 2011-05-09 | 2011-05-09 | 485 communication system with strong anti-interference capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202077043U true CN202077043U (en) | 2011-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201451490U Expired - Fee Related CN202077043U (en) | 2011-05-09 | 2011-05-09 | 485 communication system with strong anti-interference capability |
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| Country | Link |
|---|---|
| CN (1) | CN202077043U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103500988A (en) * | 2013-09-06 | 2014-01-08 | 深圳大成创安达电子科技发展有限公司 | Alternating current-direct current high voltage protection device of electronic chip and achievement method thereof |
| CN104819747A (en) * | 2015-05-27 | 2015-08-05 | 成都德麦科技有限公司 | Wireless wall-type temperature-and-humidity transmitter |
| CN105771568A (en) * | 2016-03-02 | 2016-07-20 | 马骏 | Novel waste-gas treatment device based on 485 communication technology |
-
2011
- 2011-05-09 CN CN2011201451490U patent/CN202077043U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103500988A (en) * | 2013-09-06 | 2014-01-08 | 深圳大成创安达电子科技发展有限公司 | Alternating current-direct current high voltage protection device of electronic chip and achievement method thereof |
| CN104819747A (en) * | 2015-05-27 | 2015-08-05 | 成都德麦科技有限公司 | Wireless wall-type temperature-and-humidity transmitter |
| CN105771568A (en) * | 2016-03-02 | 2016-07-20 | 马骏 | Novel waste-gas treatment device based on 485 communication technology |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20150509 |
|
| EXPY | Termination of patent right or utility model |