CN204558366U - A kind of control relay circuit with isolation - Google Patents
A kind of control relay circuit with isolation Download PDFInfo
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- CN204558366U CN204558366U CN201520221803.XU CN201520221803U CN204558366U CN 204558366 U CN204558366 U CN 204558366U CN 201520221803 U CN201520221803 U CN 201520221803U CN 204558366 U CN204558366 U CN 204558366U
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Abstract
The utility model discloses a kind of control relay circuit with isolation, relate to control relay circuit technical field.There is not potential safety hazard to during control relay circuit hotline maintenance in this circuit.The base stage of triode Q1 is connected on the other end of resistance R2, and the base stage of triode Q2 is connected on the other end of resistance R3; The base stage of triode Q4 is connected on the emitter of triode Q3, the collector electrode of triode Q3 is connected on one end of resistance R4, the base stage of triode Q3 is connected on one end of resistance R5, the other end of resistance R4 is connected on 5V supply terminals, and the other end of resistance R5 is connected to relay and closes a floodgate on end; The base stage of triode Q6 is connected on the emitter of triode Q5, the collector electrode of triode Q5 is connected on one end of resistance R6, the base stage of triode Q5 is connected on one end of resistance R7, the other end of resistance R6 is connected on 5V supply terminals, and the other end of resistance R7 is connected to relay and operates a switch on end.
Description
Technical field
The utility model relates to control relay circuit technical field, is specifically related to a kind of control relay circuit with isolation.
Background technology
Current control relay circuit is directly connected to control end on relay 12V supply terminals.Because 12V supply terminals power supply powers to the drive end of control relay circuit, power also will to the control end of control relay circuit, the stability that drive end is powered is vulnerable to the stability influence that control end is powered.Drive end power supply is unstable, and on triode, easily produce the peak voltage of about 35V, the peak voltage of about 35V easily causes triode and burns out, thus affects the useful life of relay.Further, existing control relay circuit is connected directly between on forceful electric power, causes there is potential safety hazard to the band forceful electric power maintenance of control relay circuit.Therefore, design a kind of peak voltage that can prevent the actuating of relay from producing and damage is caused to triode, and seem very necessary at the control relay circuit of isolating the band that there is not potential safety hazard during control relay circuit hotline maintenance.
Utility model content
The utility model be in order to solve existing control relay circuit due to the power supply of drive end and control end be same road power supply, the stability that drive end is powered is vulnerable to the stability influence that control end is powered, on triode, easily produce higher peak voltage cause triode and burn out, thus affect the useful life of relay, there are these deficiencies of potential safety hazard with forceful electric power maintenance, the stability providing a kind of drive end to power can not be controlled the stability influence of end power supply, drive end power supply is stablized, higher peak voltage can not be produced on triode, triode is easy burn-out not, thus extend control relay circuit useful life, and to a kind of control relay circuit with isolation that there is not potential safety hazard during control relay circuit hotline maintenance.
Above technical problem is solved by following technical proposal:
A kind of control relay circuit with isolation, comprise: resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, diode D1, diode D2, transient voltage suppressor TVS, triode Q1, triode Q2, triode Q3, triode Q4, triode Q5, triode Q6, electric capacity C1, a node, No. two nodes, No. three nodes, No. four nodes, No. five nodes, No. six nodes, No. seven nodes, No. eight nodes, No. nine nodes, No. ten nodes, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, photoelectrical coupler OPT22, photoelectrical coupler OPT23, electric wire earth terminal GND, relay closes a floodgate and holds, relay is operated a switch end, 12V supply terminals, 5V supply terminals and signal ground end SGND, the negative pole end of described diode D1,12V supply terminals, one end of resistance R1 and the negative pole end of diode D2 are connected on a node, the emitter of the emitter of described triode Q1, the other end of resistance R1 and triode Q2 is connected on No. two nodes, the collector electrode of one end of the positive terminal of described diode D1, the collector electrode of triode Q1, transient voltage suppressor TVS, one end of resistance R3, one end of electric capacity C1 and triode Q4 is connected on No. three nodes, the collector electrode of the other end of the positive terminal of described diode D2, the collector electrode of triode Q2, transient voltage suppressor TVS, one end of resistance R2, the other end of electric capacity C1 and triode Q6 is connected on No. four nodes, one end of the emitter of triode Q4, signal ground end SGND, the transmitting of triode Q6, one end of resistance R10 and resistance R13 is connected on No. five nodes, described relay combined floodgate end, one end of resistance R8, one end of resistance R9 are connected on No. six nodes, No. 3 ports of the other end of described resistance R5, the other end of resistance R10 and photoelectrical coupler OPT22 are connected on No. seven nodes, operate a switch end, one end of resistance R11, one end of resistance R12 of described relay is connected on No. eight nodes, the other end of described resistance R9, No. 2 ports of photoelectrical coupler OPT22, the other end of resistance R12, No. 2 ports of photoelectrical coupler OPT23 and electric wire earth terminal GND are connected on No. nine nodes, No. 3 ports of the other end of described resistance R7, the other end of resistance R13 and photoelectrical coupler OPT23 are connected on No. ten nodes, the base stage of triode Q1 is connected on the other end of resistance R2, and the base stage of triode Q2 is connected on the other end of resistance R3, the base stage of triode Q4 is connected on the emitter of triode Q3, and the collector electrode of triode Q3 is connected on one end of resistance R4, and the base stage of triode Q3 is connected on one end of resistance R5, and the other end of resistance R4 is connected on 5V supply terminals, the base stage of triode Q6 is connected on the emitter of triode Q5, and the collector electrode of triode Q5 is connected on one end of resistance R6, and the base stage of triode Q5 is connected on one end of resistance R7, and the other end of resistance R6 is connected on 5V supply terminals, the other end of resistance R8 is connected on No. 1 port of photoelectrical coupler OPT22, the other end of resistance R11 is connected on No. 1 port of photoelectrical coupler OPT23, No. 4 ports of photoelectrical coupler OPT22 are connected on 5V supply terminals, and No. 4 ports of photoelectrical coupler OPT23 are also connected on 5V supply terminals.
R1 is current limiting safeguard resistor, prevents big current from causing damage to the device after control relay circuit.
D1, D2, TVS, C1 are protection device, and the comparatively high peak voltage of about the 35V preventing control relay circuit action from producing causes damage to triode.
R2, R3 are transistor base current control resistor, make to be in comparatively stable state during triode operation.
R4, R6, Q3, Q5 provide drive current for control relay circuit;
R8, R11 are respectively photoelectrical coupler OPT22 and photoelectrical coupler OPT23 provides setting operating current.
The course of work: when relay combined floodgate end becomes high level from low level, high level is after the current limliting of resistance R8, again through the LEDs ON of photoelectrical coupler OPT22, the light-emitting diode of photoelectrical coupler OPT22 is made to produce light signal, thus make the photistor conducting of photoelectrical coupler OPT22, and then make No. seven nodes become high level from low level, now, triode Q3 conducting, and then triode Q4 conducting, No. three nodes become low level from original high level, the triode Q2 conducting controlled by resistance R3, now there is enough pressure reduction and make control relay circuit towards the action of relay combined floodgate end in two control ends of control relay circuit.In like manner, when relay operate a switch end become high level from low level time, high level is after the current limliting of resistance R11, again through the LEDs ON of photoelectrical coupler OPT23, the light-emitting diode of photoelectrical coupler OPT23 is made to produce light signal, thus make the photistor conducting of photoelectrical coupler OPT23, and then make No. ten nodes become high level from low level, now, triode Q5 conducting, and then triode Q6 conducting, No. four nodes become low level from original high level, the triode Q1 conducting controlled by resistance R2, now there is enough pressure reduction and control relay circuit to be operated a switch end action towards relay in two control ends of control relay circuit.
Two control ends of this programme repeat circuit control circuit are No. three nodes and No. four nodes.R4, R6, Q3, Q5 by 5V power supply for control relay circuit provides drive current, be pulled to compared with 12V power supply (cause due to the fluctuation of civil power this power supply stable not) in the past more reliable and more stable.The stability that the drive end of control relay circuit is powered can not be controlled the stability influence holding power supply, drive end power supply is stablized, higher peak voltage can not be produced on triode, triode is easy burn-out not, thus extend useful life of relay, and there is not potential safety hazard to during control relay circuit hotline maintenance.This programme cost is low, and reliability is high.This programme achieves the signal of telecommunication by photoelectrical coupler OPT22 and photoelectrical coupler OPT23 and turns the function that light signal turns the signal of telecommunication again, has accomplished electrical isolation, has made control relay circuit part depart from forceful electric power end, become safer
As preferably, described triode Q1 and described triode Q2 is the triode of positive-negative-positive.The triode connecting circuit of this model is simple and be easy to control, good stability.
As preferably, described triode Q3, described triode Q4, described triode Q5 and described triode Q6 are the triode of NPN type.The triode connecting circuit of this model is simple and be easy to control, good stability.
The utility model can reach following effect:
The stability that the drive end of the utility model control relay circuit is powered can not be controlled the stability influence holding power supply, drive end power supply is stablized, higher peak voltage can not be produced on triode, triode is easy burn-out not, thus extend useful life of relay, and there is not potential safety hazard to during control relay circuit hotline maintenance.The utility model cost is low, and reliability is high.
Accompanying drawing explanation
Fig. 1 is a kind of circuit theory syndeton schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is further described.
Embodiment, a kind of control relay circuit with isolation, shown in Figure 1, comprising: resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, diode D1, diode D2, transient voltage suppressor TVS, PNP triode Q1, PNP triode Q2, NPN triode Q3, NPN triode Q4, NPN triode Q5, NPN triode Q6, electric capacity C1, a node (101), No. two nodes (102), No. three nodes (103), No. four nodes (104), No. five nodes (105), No. six nodes (106), No. seven nodes (107), No. eight nodes (108), No. nine nodes (109), No. ten nodes (110), resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, photoelectrical coupler OPT22, photoelectrical coupler OPT23, electric wire earth terminal 6ND, relay closes a floodgate and holds, relay is operated a switch end, 12V supply terminals, 5V supply terminals and signal ground end SGND.The negative pole end of described diode D1,12V supply terminals, one end of resistance R1 and the negative pole end of diode D2 are connected on a node.The emitter of described PNP triode Q1, the other end of resistance R1 and the emitter of PNP triode Q2 are connected on No. two nodes.The collector electrode of one end of the positive terminal of described diode D1, the collector electrode of PNP triode Q1, transient voltage suppressor TVS, one end of resistance R3, one end of electric capacity C1 and NPN triode Q4 is connected on No. three nodes.The collector electrode of the other end of the positive terminal of described diode D2, the collector electrode of PNP triode Q2, transient voltage suppressor TVS, one end of resistance R2, the other end of electric capacity C1 and NPN triode Q6 is connected on No. four nodes.The emitter of NPN triode Q4, the transmitting of signal ground end SGND, NPN triode Q6, one end of resistance R10 and one end of resistance R13 are connected on No. five nodes.Described relay combined floodgate end, one end of resistance R8, one end of resistance R9 are connected on No. six nodes.No. 3 ports of the other end of described resistance R5, the other end of resistance R10 and photoelectrical coupler OPT22 are connected on No. seven nodes.Operate a switch end, one end of resistance R11, one end of resistance R12 of described relay is connected on No. eight nodes.The other end of described resistance R9, No. 2 ports of photoelectrical coupler OPT22, the other end of resistance R12, No. 2 ports of photoelectrical coupler OPT23 and electric wire earth terminal GND are connected on No. nine nodes.No. 3 ports of the other end of described resistance R7, the other end of resistance R13 and photoelectrical coupler OPT23 are connected on No. ten nodes.The base stage of PNP triode Q1 is connected on the other end of resistance R2, and the base stage of PNP triode Q2 is connected on the other end of resistance R3.The base stage of NPN triode Q4 is connected on the emitter of NPN triode Q3, and the collector electrode of NPN triode Q3 is connected on one end of resistance R4, and the base stage of NPN triode Q3 is connected on one end of resistance R5, and the other end of resistance R4 is connected on 5V supply terminals.The base stage of NPN triode Q6 is connected on the emitter of NPN triode Q5, and the collector electrode of NPN triode Q5 is connected on one end of resistance R6, and the base stage of NPN triode Q5 is connected on one end of resistance R7, and the other end of resistance R6 is connected on 5V supply terminals.The other end of resistance R8 is connected on No. 1 port of photoelectrical coupler OPT22; The other end of resistance R11 is connected on No. 1 port of photoelectrical coupler OPT23; No. 4 ports of photoelectrical coupler OPT22 are connected on 5V supply terminals, and No. 4 ports of photoelectrical coupler OPT23 are also connected on 5V supply terminals.
R1 is current limiting safeguard resistor, prevents big current from causing damage to the device after control relay circuit.
D1, D2, TVS, C1 are protection device, and the comparatively high peak voltage of about the 35V preventing control relay circuit action from producing causes damage to triode.
R2, R3 are transistor base current control resistor, make to be in comparatively stable state during triode operation.
R4, R6, Q3, Q5 provide drive current for control relay circuit.
R8, R11 are respectively photoelectrical coupler OPT22 and photoelectrical coupler OPT23 provides setting operating current.
The course of work:
When relay combined floodgate end becomes high level from low level, high level is after the current limliting of resistance R8, again through the LEDs ON of photoelectrical coupler OPT22, the light-emitting diode of photoelectrical coupler OPT22 is made to produce light signal, thus make the photistor conducting of photoelectrical coupler OPT22, and then make No. seven nodes become high level from low level, now, NPN triode Q3 conducting, and then NPN triode Q4 conducting, No. three nodes (103) become low level from original high level, the PNP triode Q2 conducting controlled by resistance R3, now there is enough pressure reduction and make control relay circuit towards the action of relay combined floodgate end in two control ends of control relay circuit.
In like manner, when relay operate a switch end become high level from low level time, high level is after the current limliting of resistance R11, again through the LEDs ON of photoelectrical coupler OPT23, the light-emitting diode of photoelectrical coupler OPT23 is made to produce light signal, thus make the photistor conducting of photoelectrical coupler OPT23, and then make No. ten nodes become high level from low level, now, NPN triode Q5 conducting, and then NPN triode Q6 conducting, No. four nodes (104) become low level from original high level, the PNP triode Q1 conducting controlled by resistance R2, now there is enough pressure reduction and control relay circuit to be operated a switch end action towards relay in two control ends of control relay circuit.
Two control ends of this example repeat circuit control circuit are No. three nodes (103) and No. four nodes (104).R4, R6, Q3, Q5 by 5V power supply for control relay circuit provides drive current, be pulled to compared with 12V power supply (cause due to the fluctuation of civil power this power supply stable not) in the past more reliable and more stable.The stability that the drive end of this example control relay circuit is powered can not be controlled the stability influence holding power supply, drive end power supply is stablized, higher peak voltage can not be produced on triode, triode is easy burn-out not, thus extend useful life of relay, and there is not potential safety hazard to during control relay circuit hotline maintenance.This example cost is low, and reliability is high.
This example achieves the signal of telecommunication by photoelectrical coupler OPT22 and photoelectrical coupler OPT23 and turns the function that light signal turns the signal of telecommunication again, has accomplished electrical isolation, has made control relay circuit part depart from forceful electric power end, become safer.
Describe execution mode of the present utility model by reference to the accompanying drawings above, but do not limit by above-described embodiment when realizing, those of ordinary skill in the art can make a variety of changes within the scope of the appended claims or revise.
Claims (3)
1. the control relay circuit with isolation, it is characterized in that, comprise: resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, diode D1, diode D2, transient voltage suppressor TVS, triode Q1, triode Q2, triode Q3, triode Q4, triode Q5, triode Q6, electric capacity C1, a node (101), No. two nodes (102), No. three nodes (103), No. four nodes (104), No. five nodes (105), No. six nodes (106), No. seven nodes (107), No. eight nodes (108), No. nine nodes (109), No. ten nodes (110), resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, photoelectrical coupler OPT22, photoelectrical coupler OPT23, electric wire earth terminal GND, relay closes a floodgate and holds, relay is operated a switch end, 12V supply terminals, 5V supply terminals and signal ground end SGND, the negative pole end of described diode D1,12V supply terminals, one end of resistance R1 and the negative pole end of diode D2 are connected on a node, the emitter of the emitter of described triode Q1, the other end of resistance R1 and triode Q2 is connected on No. two nodes, the collector electrode of one end of the positive terminal of described diode D1, the collector electrode of triode Q1, transient voltage suppressor TVS, one end of resistance R3, one end of electric capacity C1 and triode Q4 is connected on No. three nodes, the collector electrode of the other end of the positive terminal of described diode D2, the collector electrode of triode Q2, transient voltage suppressor TVS, one end of resistance R2, the other end of electric capacity C1 and triode Q6 is connected on No. four nodes, one end of the emitter of triode Q4, signal ground end SGND, the transmitting of triode Q6, one end of resistance R10 and resistance R13 is connected on No. five nodes, described relay combined floodgate end, one end of resistance R8, one end of resistance R9 are connected on No. six nodes, No. 3 ports of the other end of described resistance R5, the other end of resistance R10 and photoelectrical coupler OPT22 are connected on No. seven nodes, operate a switch end, one end of resistance R11, one end of resistance R12 of described relay is connected on No. eight nodes, the other end of described resistance R9, No. 2 ports of photoelectrical coupler OPT22, the other end of resistance R12, No. 2 ports of photoelectrical coupler OPT23 and electric wire earth terminal GND are connected on No. nine nodes, No. 3 ports of the other end of described resistance R7, the other end of resistance R13 and photoelectrical coupler OPT23 are connected on No. ten nodes, the base stage of triode Q1 is connected on the other end of resistance R2, and the base stage of triode Q2 is connected on the other end of resistance R3, the base stage of triode Q4 is connected on the emitter of triode Q3, and the collector electrode of triode Q3 is connected on one end of resistance R4, and the base stage of triode Q3 is connected on one end of resistance R5, and the other end of resistance R4 is connected on 5V supply terminals, the base stage of triode Q6 is connected on the emitter of triode Q5, and the collector electrode of triode Q5 is connected on one end of resistance R6, and the base stage of triode Q5 is connected on one end of resistance R7, and the other end of resistance R6 is connected on 5V supply terminals, the other end of resistance R8 is connected on No. 1 port of photoelectrical coupler OPT22, the other end of resistance R11 is connected on No. 1 port of photoelectrical coupler OPT23, No. 4 ports of photoelectrical coupler OPT22 are connected on 5V supply terminals, and No. 4 ports of photoelectrical coupler OPT23 are also connected on 5V supply terminals.
2. a kind of control relay circuit with isolation according to claim 1, is characterized in that, described triode Q1 and described triode Q2 is the triode of positive-negative-positive.
3. a kind of control relay circuit with isolation according to claim 1, is characterized in that, described triode Q3, described triode Q4, described triode Q5 and described triode Q6 are the triode of NPN type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520221803.XU CN204558366U (en) | 2015-04-14 | 2015-04-14 | A kind of control relay circuit with isolation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520221803.XU CN204558366U (en) | 2015-04-14 | 2015-04-14 | A kind of control relay circuit with isolation |
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| Publication Number | Publication Date |
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| CN204558366U true CN204558366U (en) | 2015-08-12 |
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| CN201520221803.XU Active CN204558366U (en) | 2015-04-14 | 2015-04-14 | A kind of control relay circuit with isolation |
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| CN (1) | CN204558366U (en) |
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Address after: 310024, Zhejiang, Hangzhou province Xihu District Zhuan Tong Street, Zhuan Tong Science and Technology Economic Zone No. 11 Patentee after: Hangzhou Xili intelligent Polytron Technologies Inc Address before: 310014 Zhejiang, Xihu District Tong Tong Street turn to science and technology economic block block No. 11 Patentee before: HANGZHOU XILI WATT-HOUR METER MANUFACTURE CO., LTD. |