CN202749304U - Control circuit for relays - Google Patents
Control circuit for relays Download PDFInfo
- Publication number
- CN202749304U CN202749304U CN 201220343447 CN201220343447U CN202749304U CN 202749304 U CN202749304 U CN 202749304U CN 201220343447 CN201220343447 CN 201220343447 CN 201220343447 U CN201220343447 U CN 201220343447U CN 202749304 U CN202749304 U CN 202749304U
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- relay
- triode
- photoelectrical coupler
- control
- diode
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Abstract
The utility model relates to a control circuit for relays. The control circuit comprises a first relay and a relay driving circuit, wherein the relay driving circuit comprises a first optoelectronic coupler and a first triode; the input end of the first optoelectronic coupler controls a relay control signal for controlling the on and off of a first relay coil; a power control module is arranged between the power input end of the relay and a processor; the power control module consists of a low level trigger unit, a second relay connected with the output end of the low level trigger unit, a high level trigger unit and a third relay connected with the output end of the high level trigger unit; output loops of the second relay and the third relay are connected in series; the other end of the output loop of the second relay is connected with an electric power supply of the relay driving circuit; and the other end of the output loop of the third relay is connected with the power input end of the first relay. The control circuit can be used for effectively preventing malfunction of the relays resulting from equipment power up and power down, and external interference.
Description
Technical field
The utility model relates to a kind of control circuit for relay, belongs to the Control field.
Background technology
Relay is a kind of device that is in daily use in control system, is used for realizing the control of multiple actuator, uses simple, reliable.In the prior art, common relay drive circuit is to control one to one, i.e. the control of corresponding one road output relay of one road IO signal.Often run in actual applications following problem: (1) device power need to be made an appointment with the initialization time of a few tens of milliseconds, and the state of IO signal is uncertain during this period; (2) moment of device looses power because the existence of energy-storage travelling wave tube in the circuit, often processor dead electricity stop control, peripheral IO still is in unsettled operating state; (3) the residing circumstance complication of equipment, control signal is subject to the impact of external electromagnetic interference.More than three kinds of situations, IO often is in uncontrolled or stochastic regime, or follows the appearance of burr and pulse, these all can cause the misoperation of output relay misoperation and outside actuator.
Summary of the invention
The purpose of this utility model provides a kind of control circuit for relay, and this control circuit that is used for relay can prevent effectively that the relay misoperation that device power, power down and external interference cause from doing, facts have proved reliable and stable, simple possible.
For achieving the above object, the technical solution adopted in the utility model is: a kind of control circuit for relay comprises one first relay and is used for the relay drive circuit of this relay of control; This relay drive circuit comprises the first photoelectrical coupler, is used for driving the first triode of described the first relay; Described the first photoelectrical coupler input receives the relay control signal that is used for control the first relay coil break-make; The first photoelectrical coupler output loop one end is connected to the first relay power input and the first relay coil one end, the other end is connected to the first triode input circuit that is comprised of base stage and collector electrode, emitter is connected to the relay coil other end in this first triode input circuit, grounded collector in the first triode input circuit;
Processor, its output are used for the power control signal of control relay drive circuitry and are used for the relay control signal of control the first relay coil break-make;
Be provided with energy supply control module between described relay power input and the described processor, this energy supply control module is comprised of low level trigger element, the second relay that is connected with low level trigger element output, high level trigger element and the 3rd relay that is connected with high level trigger element output; Described the second relay and the 3rd relay normally opened contact separately are connected in series, this the second relay normally open contact other end is connected with described relay drive circuit power supply, this the 3rd relay normally open contact other end is connected with described the first relay power input, and described processor is provided with default coding;
Described low level trigger element comprises the first comparator, the second photoelectrical coupler that is connected with the first comparator, is used for driving the second triode of described the second relay; Described the first comparator one input receives the power control signal that is used for the control relay drive circuitry of self processor, and another input of described the first comparator receives default coding; The second photoelectrical coupler output loop one end is connected to the second relay power and the second relay coil one end, is provided with the second triode that works in saturated or cut-off state between the second photoelectrical coupler output loop other end and the second relay coil other end;
Described high level trigger element comprises the second comparator, the 3rd photoelectrical coupler that is connected with the second comparator, be used for the 3rd triode that drives described the 3rd relay and work in saturated or cut-off state; Described the second comparator one input receives the power control signal that is used for the control relay drive circuit of self processor, and another input of described the second comparator receives default coding; Be provided with an inverter between described the second comparator and the 3rd photoelectrical coupler; Two outputs of the 3rd photoelectrical coupler are connected respectively to base stage and the collector electrode in described the 3rd triode input circuit, and one the 3rd resistance is positioned at the 3rd relay power and the second relay coil one end; Described the 3rd triode output loop one end is connected to described the 3rd relay coil, the 3rd triode output loop other end ground connection.
Further improvement project is as follows in the technique scheme:
1, in the such scheme, one the 3rd diode is in parallel with described relay, and this 3rd diode cathode is connected to described the 3rd triode output loop, and this 3rd diode cathode is connected to described relay power input; One the 7th electric capacity is connected across described the first photoelectrical coupler output loop two ends.
2, in the such scheme, one first diode is in parallel with described the second relay, and this first diode cathode is connected to described the second triode output loop, and this first diode cathode is connected to described the second relay power.
3, in the such scheme, one the 3rd electric capacity is connected across described photoelectrical coupler output loop two ends.
4, in the such scheme, one second diode is in parallel with described the 3rd relay, and this second diode cathode is connected to described the 3rd triode output loop, and this second diode cathode is connected to described the 3rd relay power.
5, in the such scheme, one the 4th electric capacity is connected across described the 3rd photoelectrical coupler output loop two ends.
Because technique scheme is used, the utility model compared with prior art has following advantages and effect:
The utility model is used for the control circuit of relay, can prevent effectively that the relay misoperation that device power, power down and external interference cause from doing, facts have proved reliable and stable, simple possible; Secondly, power control circuit is divided into low level trigger element, two loops of high level trigger element, has improved the redundancy of control in hardware designs.
Description of drawings
Accompanying drawing 1 is used for the control circuit electrical schematic diagram of relay for the utility model;
Accompanying drawing 3 is the utility model relay drive circuit electrical schematics.
In the above accompanying drawing: 1, relay drive circuit; 2, energy supply control module; 21, low level trigger element; 22, high level trigger element; 3, power supply; 4, processor.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment: a kind of control circuit for relay comprises one first relay R LY3 and is used for the relay drive circuit 1 of this relay of control; This relay drive circuit 1 comprises the first photoelectrical coupler U6, is used for driving the first triode Q3 of described the first relay R LY3; Described the first photoelectrical coupler U6 input receives the relay control signal that is used for control the first relay R LY3 coil break-make; The first photoelectrical coupler U6 output loop one end is connected to the first relay power input CTL and the first relay R LY3 coil one end, the other end is connected to the first triode Q3 input circuit that is comprised of base stage and collector electrode, emitter is connected to the relay coil other end in this first triode Q3 input circuit, grounded collector in the first triode Q3 input circuit;
Be provided with energy supply control module 2 between described relay power input CTL and the described processor, this energy supply control module 2 is comprised of low level trigger element 21, the second relay R LY1 that is connected with low level trigger element 21 outputs, high level trigger element 22 and the 3rd relay R LY2 that is connected with high level trigger element 22 outputs; Described the second relay R LY1 and the 3rd relay R LY2 normally opened contact separately are connected in series, this second relay R LY1 normally opened contact other end is connected with described relay drive circuit 1 power supply, this the 3rd relay R LY2 normally opened contact other end is connected with described the first relay power input CTL, and described processor is provided with default coding;
Described low level trigger element 21 comprises the first comparator U1, the second photoelectrical coupler U4 that is connected with the first comparator U1, is used for driving the second triode Q1 of described the second relay R LY1; Described the first comparator U1 one input receives the power control signal that is used for the control relay drive circuitry of self processor, and another input of described the first comparator U1 receives default coding; The second photoelectrical coupler U4 output loop one end is connected to the second relay R LY1 power supply and the second relay R LY1 coil one end, is provided with the second triode Q1 that works in saturated or cut-off state between the second photoelectrical coupler U4 output loop other end and the second relay R LY1 coil other end;
Described high level trigger element 22 comprises the second comparator U2, the 3rd photoelectrical coupler U5 that is connected with the second comparator U2, be used for driving described the 3rd relay R LY2 and work in the 3rd triode Q2 of saturated or cut-off state; Described the second comparator U2 one input receives the power control signal that is used for the control relay drive circuit of self processor, and another input of described the second comparator U2 receives default coding; Be provided with an inverter U3 between described the second comparator U2 and the 3rd photoelectrical coupler U5; Two outputs of the 3rd photoelectrical coupler U5 are connected respectively to base stage and the collector electrode in described the 3rd triode Q2 input circuit, and one the 3rd resistance R 3 is positioned at the 3rd relay R LY2 power supply and the second relay R LY1 coil one end; Described the 3rd triode Q2 output loop one end is connected to described the 3rd relay R LY2 coil, the 3rd triode Q2 output loop other end ground connection.
One the 3rd diode D3 is in parallel with described relay R LY3, this the 3rd diode D3 positive pole is connected to described the 3rd triode Q3 output loop, this the 3rd diode D3 negative pole is connected to described relay power input CTL, and the 3rd diode D3 is the fly-wheel diode of the first relay R LY3 coil; One the 7th capacitor C 7 is connected across described the first photoelectrical coupler U6 output loop two ends.
One first diode D1 is in parallel with described the second relay R LY1, this first diode D1 positive pole is connected to described the second triode Q1 output loop, this first diode D1 negative pole is connected to described the second relay R LY1 power supply, and the first diode D1 is the fly-wheel diode of the second relay R LY1 coil.
One the 3rd capacitor C 3 is connected across described photoelectrical coupler U6 output loop two ends.
One second diode D2 is in parallel with described the 3rd relay R LY2, this second diode D2 positive pole is connected to described the 3rd triode Q2 output loop, this second diode D2 negative pole is connected to described the 3rd relay R LY2 power supply, and the second diode D2 is the fly-wheel diode of the 3rd relay R LY2 coil.
One the 4th capacitor C 4 is connected across described the 3rd photoelectrical coupler U5 output loop two ends.
The foregoing course of work is as follows.
Shown in attached Fig. 1 and 2, increase energy supply control module 2 in relay control module 1 prime.When needs are controlled the first output relay RLY3, processor sends the consistent power control signal of a certain default coding, trigger the acting in conjunction in loop 21 and high level triggering loop 22 by low level in the energy supply control module 2, controlled source node CTL_24V is communicated to power supply 24V, be that relay control module 1 must be electric, the first output relay RLY3 is exported the direct control of control IO signal IO_B0.When not needing to control, the power control signal of processor is set to non-default encoded radio, relay control module 1 dead electricity then, and the first output relay RLY3 is in uncontrolled state.
The low level of energy supply control module 2 triggers in the loop 21, and the A mouth of the first comparator U1 meets the power control signal IO_A3 ~ IO_A0 of processor, and the B mouth connects default encoded radio, is Binary Zero 101 such as figure.When power control signal IO_A3 ~ IO_A0 sends 0101, consistent with default encoded radio, the first comparator U1 output low level then, 2 pin of the second optocoupler U4 are low level, the optocoupler conducting, the ground level of the second triode Q1 flows into forward current and is in saturation condition, drives the second relay R LY1 coil and gets electricly, and the normally opened contact of the second relay R LY1 is closed.
High level triggers in the loop 22, and the A mouth of the second comparator U2 meets the power control signal IO_A7 ~ IO_A4 of processor, and the B mouth connects default coding, is Binary Zero 011 such as figure.When power control signal IO_A7 ~ IO_A4 sends 0011, consistent with default coding, the second comparator U2 output low level then, convert high level to through the first inverter U3,2 religions of the 3rd optocoupler U5 are high level, the optocoupler cut-off, and the ground level of the 3rd diode Q2 flows into forward current and is in saturation condition, drive the 3rd relay R LY2 coil and get electricly, the normally opened contact of the 3rd relay R LY2 is closed.
When power control signal IO_A7 ~ IO_A0 sends 00110101, trigger loop 21 and high level triggering loop 22 actings in conjunction by low level, the second relay R LY1 and the 3rd relay R LY2 move simultaneously, power supply 24V and controlled source node CTL_24V connect, output relay module 1 gets electric, and then the first output relay RLY3 is exported the direct control of control signal IO_B0.On the contrary, when power control signal IO_A7 ~ IO_A0 is non-zero 0110101, then the second relay R LY1 and the 3rd relay R LY2 can not move simultaneously, controlled source node CTL_24V is open-circuit condition, this moment, output relay module 1 controlled source was opened a way the first output relay RLY3) not controlled.
In the output relay module, the first diode D3 is connected anti-parallel in the first output relay RLY3 coil, for coil current provides current by pass.The first triode Q3 only is operated in saturated and cut-off state, need select suitable current-limiting resistance R9R10 by calculating for this reason.The first capacitor C 6 is parallel to the first optocoupler input, is input end signal filtering, and the second capacitor C 7 is parallel to the first optocoupler output, is output end signal filtering.Each components and parts effect is similar in the energy supply control module.
Above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with technique can understand content of the present utility model and according to this enforcement, can not limit protection range of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, and all should be encompassed within the protection range of the present utility model.
Claims (6)
1. control circuit that is used for relay comprises one first relay (RLY3) and is used for the relay drive circuit (1) of this relay of control; This relay drive circuit (1) comprises for first photoelectrical coupler (U6) of signal isolation, for the first triode (Q3) that drives described the first relay (RLY3); Described the first photoelectrical coupler (U6) input receives the relay control signal that is used for control the first relay (RLY3) coil break-make; The first photoelectrical coupler (U6) output loop one end is connected to the first relay (RLY3) controlled source node (CTL_24V) and the first relay (RLY3) coil one end, the other end is connected to the first triode (Q3) input circuit that is comprised of base stage and collector electrode, emitter is connected to the relay coil other end in this first triode (Q3) input circuit, grounded collector in the first triode (Q3) input circuit;
Processor (4), its output are used for the power control signal of control relay drive circuitry and are used for the relay control signal of control the first relay (RLY3) coil break-make;
It is characterized in that: be provided with energy supply control module (2) between described the first relay (RLY3) controlled source node (CTL_24V) and the described processor (4), this energy supply control module (2) is comprised of low level trigger element (21), the second relay (RLY1) that is connected with low level trigger element (21) output, high level trigger element (22) and the 3rd relay (RLY2) that is connected with high level trigger element (22) output; Described the second relay (RLY1) and the 3rd relay (RLY2) normally opened contact separately are connected in series, this the second relay (RLY1) normally opened contact other end is connected with the power supply (24V) that is used for to described relay drive circuit (1) power supply, the controlled source node (CTL_24V) that is used for relay drive circuit (1) power supply in this 3rd relay (RLY2) normally opened contact other end and described the first relay is connected, and described processor is provided with default the coding;
Described low level trigger element (21) comprises the first comparator (U1), the second photoelectrical coupler (U4) that is connected with the first comparator (U1), is used for driving second triode (Q1) of described the second relay (RLY1); Described the first comparator (U1) input receives the power control signal that is used for the control relay drive circuitry of self processor, and another input of described the first comparator (U1) receives default coding; The second photoelectrical coupler (U4) output loop one end is connected to the second relay (RLY1) power supply and the second relay (RLY1) coil one end, is provided with the second triode (Q1) that works in saturated or cut-off state between the second photoelectrical coupler (U4) output loop other end and the second relay (RLY1) coil other end;
Described high level trigger element (22) comprises the second comparator (U2), the 3rd photoelectrical coupler (U5) that is connected with the second comparator (U2), be used for the 3rd triode (Q2) that drives described the 3rd relay (RLY2) and work in saturated or cut-off state; Described the second comparator (U2) input receives the power control signal that is used for the control relay drive circuit of self processor, and another input of described the second comparator (U2) receives default coding; Be provided with an inverter (U3) between described the second comparator (U2) and the 3rd photoelectrical coupler (U5); Two outputs of the 3rd photoelectrical coupler (U5) are connected respectively to base stage and the collector electrode in described the 3rd triode (Q2) input circuit, and one the 3rd resistance (R3) is positioned at the 3rd relay (RLY2) power supply and the second relay (RLY1) coil one end; Described the 3rd triode (Q2) output loop one end is connected to described the 3rd relay (RLY2) coil, the 3rd triode (Q2) output loop other end ground connection.
2. control circuit according to claim 1, it is characterized in that: one the 3rd diode (D3) is in parallel with described relay (RLY3), this the 3rd diode (D3) positive pole is connected to described the 3rd triode (Q3) output loop, and this 3rd diode (D3) negative pole is connected to described relay power input (CTL); One the 7th electric capacity (C7) is connected across described the first photoelectrical coupler (U6) output loop two ends.
3. control circuit according to claim 1 and 2, it is characterized in that: one first diode (D1) is in parallel with described the second relay (RLY1), this the first diode (D1) positive pole is connected to described the second triode (Q1) output loop, and this first diode (D1) negative pole is connected to described the second relay (RLY1) power supply.
4. control circuit according to claim 1 and 2, it is characterized in that: one the 3rd electric capacity (C3) is connected across described photoelectrical coupler (U6) output loop two ends.
5. control circuit according to claim 1 and 2, it is characterized in that: one second diode (D2) is in parallel with described the 3rd relay (RLY2), this the second diode (D2) positive pole is connected to described the 3rd triode (Q2) output loop, and this second diode (D2) negative pole is connected to described the 3rd relay (RLY2) power supply.
6. control circuit according to claim 1 and 2, it is characterized in that: one the 4th electric capacity (C4) is connected across described the 3rd photoelectrical coupler (U5) output loop two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220343447 CN202749304U (en) | 2012-07-16 | 2012-07-16 | Control circuit for relays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220343447 CN202749304U (en) | 2012-07-16 | 2012-07-16 | Control circuit for relays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202749304U true CN202749304U (en) | 2013-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220343447 Withdrawn - After Issue CN202749304U (en) | 2012-07-16 | 2012-07-16 | Control circuit for relays |
Country Status (1)
| Country | Link |
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| CN (1) | CN202749304U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751143A (en) * | 2012-07-16 | 2012-10-24 | 苏州工业园区和顺电气股份有限公司 | Control circuit for relay |
| CN103680274A (en) * | 2013-12-26 | 2014-03-26 | 江苏大学 | Automatic detection method and device for connection wire of electrical experimental facility |
| CN103996567A (en) * | 2014-05-27 | 2014-08-20 | 华为技术有限公司 | Contactor driving circuit |
| CN107166165A (en) * | 2017-07-07 | 2017-09-15 | 山东特联信息科技有限公司 | Filling machine control device and system |
| CN114188915A (en) * | 2021-12-03 | 2022-03-15 | 浙江佳乐科仪股份有限公司 | Built-in signal self-locking isolation control device of frequency converter |
-
2012
- 2012-07-16 CN CN 201220343447 patent/CN202749304U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751143A (en) * | 2012-07-16 | 2012-10-24 | 苏州工业园区和顺电气股份有限公司 | Control circuit for relay |
| CN103680274A (en) * | 2013-12-26 | 2014-03-26 | 江苏大学 | Automatic detection method and device for connection wire of electrical experimental facility |
| CN103680274B (en) * | 2013-12-26 | 2016-01-20 | 江苏大学 | A kind of connection wire of electrical experimental facility automatic testing method and device |
| CN103996567A (en) * | 2014-05-27 | 2014-08-20 | 华为技术有限公司 | Contactor driving circuit |
| CN107166165A (en) * | 2017-07-07 | 2017-09-15 | 山东特联信息科技有限公司 | Filling machine control device and system |
| CN114188915A (en) * | 2021-12-03 | 2022-03-15 | 浙江佳乐科仪股份有限公司 | Built-in signal self-locking isolation control device of frequency converter |
| CN114188915B (en) * | 2021-12-03 | 2024-08-02 | 浙江佳乐科仪股份有限公司 | Built-in signal self-locking isolation control device of frequency converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130220 Effective date of abandoning: 20141210 |
|
| RGAV | Abandon patent right to avoid regrant |