CN212750731U - Relay safety control device - Google Patents
Relay safety control device Download PDFInfo
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- CN212750731U CN212750731U CN202022267826.8U CN202022267826U CN212750731U CN 212750731 U CN212750731 U CN 212750731U CN 202022267826 U CN202022267826 U CN 202022267826U CN 212750731 U CN212750731 U CN 212750731U
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- photoelectric coupler
- relay
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- 230000002159 abnormal effect Effects 0.000 abstract description 3
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Abstract
The utility model relates to a relay safety control device, first power give third photoelectric coupler through first pilot lamp and first photoelectric coupler, and third photoelectric coupler is given through second pilot lamp and second photoelectric coupler to first power, and third photoelectric coupler is given through second photoelectric coupler to the second power, and third photoelectric coupler is realized to third photoelectric coupler control. When not needing the operation relay, make first optoelectronic coupler and second optoelectronic coupler disconnection through the power supply control signal, first power and second power do not give the third optoelectronic coupler, even if electromagnetic signal disturbs, also can not cause the relay malfunction, thereby can effectively solve electromagnetic interference and produce the problem that disturbs to control signal and lead to the relay malfunction. Moreover, the running state of each corresponding line can be intuitively known through each indicating lamp, so that the running state of the whole device can be determined according to the running state of each line, and the device can be timely maintained when abnormal conditions occur.
Description
Technical Field
The utility model relates to a relay safety control device.
Background
The application of the relay is very wide, and the control reliability is very important for the control of the relay, so that the relay is required to be ensured not to be operated by mistake or refused to operate. In general, a relay is controlled to be turned on or off by a relay control signal, and the relay control signal is a signal with a low voltage, so that the relay control signal may be affected by electromagnetic interference, thereby causing malfunction of the relay.
SUMMERY OF THE UTILITY MODEL
The utility model provides a relay safety control device for solve the relay and easily receive electromagnetic interference's influence and the problem of maloperation.
The utility model adopts the following technical scheme:
a relay safety control device comprising: the power supply comprises a first power supply, a second power supply, a first resistor, a second resistor, a third resistor, a first indicator light, a second indicator light, a third indicator light, a fourth indicator light, a first photoelectric coupler, a second photoelectric coupler, a third photoelectric coupler, a first power supply control signal receiving interface, a second power supply control signal receiving interface, a relay control signal receiving interface and a relay;
the first power supply is connected with one end of the first resistor, the other end of the first resistor is connected with one end of the first indicator lamp, the other end of the first indicator lamp is connected with the input end of the light emitting diode of the first photoelectric coupler, and the output end of the light emitting diode of the first photoelectric coupler is connected with the first power supply control signal receiving interface;
the first power supply is connected with one end of the second resistor, the other end of the second resistor is connected with one end of the second indicator light, the other end of the second indicator light is connected with the input end of the light emitting diode of the second photoelectric coupler, and the output end of the light emitting diode of the second photoelectric coupler is connected with the second power supply control signal receiving interface;
the input end of the phototriode of the first photoelectric coupler is connected with the first power supply, the output end of the phototriode of the first photoelectric coupler is connected with one end of a third resistor, the other end of the third resistor is connected with one end of a third indicator light, the other end of the third indicator light is connected with the input end of a light-emitting diode of the third photoelectric coupler, and the output end of the light-emitting diode of the third photoelectric coupler is connected with the relay control signal receiving interface;
the input of the phototriode of the second photoelectric coupler is connected with the second power supply, the output of the phototriode of the first photoelectric coupler is connected with the input of the phototriode of the third photoelectric coupler, the output of the phototriode of the third photoelectric coupler is connected with one end of a fourth indicator light, the other end of the fourth indicator light is connected with one end of a control coil of the relay, and the other end of the control coil of the relay is grounded.
Preferably, the relay safety control device further comprises a manual safety switch and a total power supply control signal receiving interface, the total power supply control signal receiving interface is connected with one end of the manual safety switch, and the other end of the manual safety switch is connected with the first power supply control signal receiving interface and the second power supply control signal receiving interface.
Preferably, the first power supply is a +3.3V power supply, and the second power supply is a +24V power supply.
The utility model has the advantages that: the used two power of relay control all indirectly give third optoelectronic coupler, but give third optoelectronic coupler through first optoelectronic coupler and second optoelectronic coupler, and, first optoelectronic coupler and second optoelectronic coupler are controlled by the power supply control signal that first power supply control signal received interface and second power supply control signal received interface, only when power supply control signal satisfies first optoelectronic coupler and second optoelectronic coupler and switches on the requirement, first power and second power just export for third optoelectronic coupler, and then just can control the relay according to the relay control signal that relay control signal received interface. Therefore, when the relay does not need to be operated, the power supply control signals received by the first power supply control signal receiving interface and the second power supply control signal receiving interface enable the first power supply and the second power supply not to supply power to the third photoelectric coupler, even if the light emitting diode of the third photoelectric coupler is caused to emit light due to electromagnetic signal interference, the phototriode is conducted, relay misoperation cannot be caused, and the problem that the electromagnetic interference interferes the control signals to cause relay misoperation can be effectively solved. Moreover, the running state of each corresponding line can be intuitively known through each indicating lamp, so that the running state of the whole device can be determined according to the running state of each line, and the device can be timely maintained when abnormal conditions occur.
Drawings
Fig. 1 is a circuit diagram of a relay safety control device;
fig. 2 is a circuit connection diagram of the manual safety switch, the total power supply control signal receiving interface, the first power supply control signal receiving interface, and the second power supply control signal receiving interface.
Detailed Description
As shown in fig. 1, the present embodiment provides a relay safety control device, including: the power supply comprises a first power supply (namely a power supply V1), a second power supply (namely a power supply V2), a first resistor (namely a resistor R1), a second resistor (namely a resistor R2), a third resistor (namely a resistor R3), a first indicator lamp (namely an indicator lamp L1), a second indicator lamp (namely an indicator lamp L2), a third indicator lamp (namely an indicator lamp L3), a fourth indicator lamp (namely an indicator lamp L4), a first photocoupler (namely a photocoupler Q1), a second photocoupler (namely a photocoupler Q2), a third photocoupler (namely a photocoupler Q3), a first power supply control signal receiving interface (interface P1), a second power supply control signal receiving interface (interface P2), a relay control signal receiving interface (interface P3) and a relay.
The power supply V1 is a relay control power supply and is a +3.3V power supply; the power supply V2 is a relay driving power supply and is a +24V power supply. The power supply V1 and the power supply V2 can be conventional power supplies, and the description of the embodiment is omitted.
As shown in fig. 1, a power supply V1 is connected to one end of a resistor R1, the other end of the resistor R1 is connected to one end of an indicator light L1, the other end of the indicator light L1 is connected to the input end of a light emitting diode of a photocoupler Q1, and the output end of the light emitting diode of a photocoupler Q1 is connected to an interface P1.
The power supply V1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with one end of the indicator light L2, the other end of the indicator light L2 is connected with the input end of the light-emitting diode of the photoelectric coupler Q2, and the output end of the light-emitting diode of the photoelectric coupler Q2 is connected with the interface P2.
The input end of the phototriode of the photoelectric coupler Q1 is connected with a power supply V1, the output end of the phototriode of the photoelectric coupler Q1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with one end of an indicator light L3, the other end of the indicator light L3 is connected with the input end of a light emitting diode of the photoelectric coupler Q3, and the output end of the light emitting diode of the photoelectric coupler Q3 is connected with an interface P3.
The input end of the phototriode of the photoelectric coupler Q2 is connected with a power supply V2, the output end of the phototriode of the photoelectric coupler Q1 is connected with the input end of the phototriode of the photoelectric coupler Q3, the output end of the phototriode of the photoelectric coupler Q3 is connected with one end of an indicator light L4, the other end of the indicator light L4 is connected with one end of a control coil T1 of a relay, and the other end of the control coil T1 is grounded.
It will be appreciated that the relay' S contact switch S1 is provided in the desired circuit and that the particular type of contact switch S1 is set by the actual need. In the present embodiment, the contact switch S1 is a normally open contact switch, for example.
Because the power supply control signals received by the interface P1 and the interface P2 are the same, in order to improve the control reliability and prevent the abnormal control condition, the relay safety control device further comprises a manual safety switch S2 and a total power supply control signal receiving interface (i.e., an interface P4), as shown in fig. 2, the interface P4 is connected with one end of the manual safety switch S2, and the other end of the manual safety switch S2 is connected with the interface P1 and the interface P2. The manual safety switch S2 implements a manual activation control, which may be a conventional rocker switch. It should be understood that the interface P4 is used for inputting the power supply control signal, and the power supply control signal can be outputted by the controller, i.e. the interface P4 is connected to the first control signal output terminal of the controller. The power supply control signal is used for controlling whether current flows in the light emitting diodes of the photocoupler Q1 and the photocoupler Q2, namely whether the light emitting diodes emit light, namely whether the photocoupler Q1 and the photocoupler Q2 are conducted. The interface P3 is used for inputting the relay control signal, and the relay control signal can also be output by the controller, i.e. the interface P3 is connected with the second control signal output end of the controller. As another embodiment, the power supply control signal and the relay control signal may also be manually input, for example, two control keys (a control key can output a high level signal or a low level signal), one control key outputs the power supply control signal, and the other control key outputs the relay control signal.
It should be understood that the specific types of components and electrical parameters of the circuit shown in fig. 1 are set by actual requirements, such as: in this embodiment, the resistances of the resistor R1 and the resistor R2 are 1K Ω, and the resistance of the resistor R3 is 250R; the models of the photoelectric coupler Q1, the photoelectric coupler Q2 and the photoelectric coupler Q3 can be Panasonic AQW214 or TLP 127; the model of the relay is determined by practical application scenarios, such as DSP2a-DC 24V.
The four indicating lamps can be LED indicating lamps, and in addition, the four indicating lamps can be different in color for the convenience of distinguishing.
When the relay needs to be controlled, the controller outputs a power supply control signal (the power supply control signal is a low level signal), then, under the effect of the power supply control signal, current flows in the light emitting diodes of the photoelectric coupler Q1 and the photoelectric coupler Q2, the light emitting diodes emit light, the phototriodes of the photoelectric coupler Q1 and the photoelectric coupler Q2 are conducted due to sensing the light signal, then, the power supply V1 supplies the input end of the light emitting diode of the photoelectric coupler Q3 through the phototriode of the photoelectric coupler Q1, and the power supply V2 supplies the input end of the phototriode of the photoelectric coupler Q3 through the phototriode of the photoelectric coupler Q2. Further, the indicator lamp L1 and the indicator lamp L2 are turned on, and the worker can visually recognize the states of the photocoupler Q1 and the photocoupler Q2 through the states of the indicator lamp L1 and the indicator lamp L2. The controller outputs a relay control signal (the relay control signal is a low level signal), current exists in a light emitting diode of a photoelectric coupler Q3, the light emitting diode emits light, a phototriode of a photoelectric coupler Q3 is conducted due to sensing of a light signal, a power supply V2 supplies power to a control coil T1 of the relay through the phototriode of the photoelectric coupler Q3 and an indicator light L4, current exists in the control coil T1, and the contact switch S1 is attracted. Moreover, the indicator lamp L3 is turned on, and the operator can intuitively know the operating state of the photocoupler Q3 through the state of the indicator lamp L3. The indicator light L4 lights up, and the staff can learn the operating condition of relay through the state intuitional perception of indicator light L4.
When the relay control is finished, the power supply control signal output by the controller is a high level signal, then, no current flows in the light emitting diodes of the photoelectric coupler Q1 and the photoelectric coupler Q2, the light emitting diodes are extinguished, the photosensitive triodes of the photoelectric coupler Q1 and the photoelectric coupler Q2 are disconnected, and then, the power supply V1 and the power supply V2 are not supplied to the photoelectric coupler Q3 any more. The relay control signal output by the controller is a high level signal. The four indicator lights are all turned off. At this time, even if the interface P3 is a low level signal due to electromagnetic interference, the control coil T1 is not energized because the power supply V1 and the power supply V2 are not provided, and the contact switch S1 is not erroneously operated.
It should be understood that, when the relay is controlled, the low-level power supply control signal and the relay control signal may be output at the same time, or the power supply control signal may be output first and then the relay control signal may be output. When the relay control is finished, the high-level power supply control signal and the relay control signal can be simultaneously output, or the power supply control signal can be output first and then the relay control signal is output, or the relay control signal can be output first and then the power supply control signal is output. It should be understood that the present application protects the hardware circuit structure of the relay safety control device, and does not relate to the output mode and output sequence of the power supply control signal and the relay control signal, and the output mode and output sequence are only the operation mode in the subsequent practical application of the relay safety control device, and do not affect the implementation of the hardware structure of the relay safety control device.
Claims (3)
1. A relay safety control device, comprising: the power supply comprises a first power supply, a second power supply, a first resistor, a second resistor, a third resistor, a first indicator light, a second indicator light, a third indicator light, a fourth indicator light, a first photoelectric coupler, a second photoelectric coupler, a third photoelectric coupler, a first power supply control signal receiving interface, a second power supply control signal receiving interface, a relay control signal receiving interface and a relay;
the first power supply is connected with one end of the first resistor, the other end of the first resistor is connected with one end of the first indicator lamp, the other end of the first indicator lamp is connected with the input end of the light emitting diode of the first photoelectric coupler, and the output end of the light emitting diode of the first photoelectric coupler is connected with the first power supply control signal receiving interface;
the first power supply is connected with one end of the second resistor, the other end of the second resistor is connected with one end of the second indicator light, the other end of the second indicator light is connected with the input end of the light emitting diode of the second photoelectric coupler, and the output end of the light emitting diode of the second photoelectric coupler is connected with the second power supply control signal receiving interface;
the input end of the phototriode of the first photoelectric coupler is connected with the first power supply, the output end of the phototriode of the first photoelectric coupler is connected with one end of a third resistor, the other end of the third resistor is connected with one end of a third indicator light, the other end of the third indicator light is connected with the input end of a light-emitting diode of the third photoelectric coupler, and the output end of the light-emitting diode of the third photoelectric coupler is connected with the relay control signal receiving interface;
the input of the phototriode of the second photoelectric coupler is connected with the second power supply, the output of the phototriode of the first photoelectric coupler is connected with the input of the phototriode of the third photoelectric coupler, the output of the phototriode of the third photoelectric coupler is connected with one end of a fourth indicator light, the other end of the fourth indicator light is connected with one end of a control coil of the relay, and the other end of the control coil of the relay is grounded.
2. The relay safety control device according to claim 1, further comprising a manual safety switch and a total power supply control signal receiving interface, wherein the total power supply control signal receiving interface is connected to one end of the manual safety switch, and the other end of the manual safety switch is connected to the first power supply control signal receiving interface and the second power supply control signal receiving interface.
3. The relay safety control device according to claim 1, wherein the first power source is a +3.3V power source, and the second power source is a +24V power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022267826.8U CN212750731U (en) | 2020-10-13 | 2020-10-13 | Relay safety control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022267826.8U CN212750731U (en) | 2020-10-13 | 2020-10-13 | Relay safety control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212750731U true CN212750731U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022267826.8U Expired - Fee Related CN212750731U (en) | 2020-10-13 | 2020-10-13 | Relay safety control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212750731U (en) |
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2020
- 2020-10-13 CN CN202022267826.8U patent/CN212750731U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211229 Address after: 461000 Xuchang electric Vocational College at the intersection of Weiwen road and Beihuan Road, Weidu District, Xuchang City, Henan Province Patentee after: XUCHANG ELECTRIC VOCATIONAL College Address before: 461000 Weiwen road and Yongchang Avenue Xuchang electrical vocational college, Weidu District, Xuchang City, Henan Province Patentee before: Wei Yi |
|
| 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: 20210319 |