CN203118869U - Relay control circuit - Google Patents
Relay control circuit Download PDFInfo
- Publication number
- CN203118869U CN203118869U CN 201320171251 CN201320171251U CN203118869U CN 203118869 U CN203118869 U CN 203118869U CN 201320171251 CN201320171251 CN 201320171251 CN 201320171251 U CN201320171251 U CN 201320171251U CN 203118869 U CN203118869 U CN 203118869U
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- CN
- China
- Prior art keywords
- triode
- relay
- diode
- control
- photoelectrical coupler
- Prior art date
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Abstract
The utility model relates to a relay control circuit, which comprises a relay (K1), a photoelectric coupler (U1) and a triode (Q1), wherein two ends of the input end of the relay (K1) are provided with a diode (D1), an emitting diode of the triode (Q1) is grounded, a collecting electrode of the triode (Q1) is electrically connected with the diode (D1), a base electrode of the triode (Q1) is electrically connected with one end of the output ends of the photoelectric coupler (U1) through a resistor (R1), the other end of the output ends of the photoelectric coupler (U1) is connected with a power supply, a positive electrode of the control end of the photoelectric coupler (U1) is connected with external control signals through a resistor (R4), a negative electrode of the control end of the photoelectric coupler (U1) is grounded through a resistor (R3), and two ends of the diode (D1) are provided with a resistor (R2). The utility model provides a simple and reasonable relay control circuit with higher practicability.
Description
Technical field
The utility model relates to a kind of control relay circuit.
Background technology
Relay is a kind of electric control device; has control system (claim not only input circuit) and by control system (but also claiming output loop); usually be applied in the control circuit of automation; be a kind of switch that goes to control big electric current running with little electric current, in circuit, play effects such as safeguard protection and change-over circuit.In existing Auto-Test System or control system, generally all can use relay control, by the break-make of single-chip microcomputer or other input signal control relays, and then the power consumption equipment of control relay output connection.Yet existing relay control circuit design is comparatively complicated, and control signal is not and the relay electrical isolation, has certain security risk, has certain limitation.
The utility model content
The utility model provides a kind of advantages of simple, the control relay circuit that practicality is stronger.
The utility model is achieved through the following technical solutions:
A kind of control relay circuit, comprise relay (K1), photoelectrical coupler (U1) and triode (Q1), the two ends of described relay (K1) input are provided with diode (D1), the grounded emitter of described triode (Q1), the collector electrode of described triode (Q1) is electrically connected with described diode (D1), the output of the base stage of described triode (Q1) by resistance (R1) and photoelectrical coupler (U1) wherein end is electrically connected, another termination power of output of photoelectrical coupler (U1), the positive pole of the control end of described photoelectrical coupler (U1) is connected with external control signal by resistance (R4), the negative pole of the control end of described photoelectrical coupler (U1) is by resistance (R3) ground connection, and described diode (D1) two ends are provided with resistance (R2).
Be provided with diode (D2) between the collector electrode of described triode (Q1) and the resistance (R2).
The beneficial effect that the utility model brings is:
In the utility model, described control relay circuit simplicity of design is reasonable, and element is less, only comprises an optocoupler and triode etc., and optocoupler has been realized the electrical equipment isolation of control signal and relay end simultaneously, makes circuit more safe and reliable.Light-emitting diode in the circuit can show the on off operating mode of relay, and is more directly perceived more clear.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is the circuit diagram of control relay circuit described in the utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail:
Embodiment as control relay circuit described in the utility model, as shown in Figure 1, comprise relay (K1), photoelectrical coupler (U1) and triode (Q1), the two ends of described relay (K1) input are provided with diode (D1), the grounded emitter of described triode (Q1), the collector electrode of described triode (Q1) is electrically connected with described diode (D1), the output of the base stage of described triode (Q1) by resistance (R1) and photoelectrical coupler (U1) wherein end is electrically connected, another termination power of output of photoelectrical coupler (U1), the positive pole of the control end of described photoelectrical coupler (U1) is connected with external control signal by resistance (R4), the negative pole of the control end of described photoelectrical coupler (U1) is by resistance (R3) ground connection, and described diode (D1) two ends are provided with resistance (R2).When the control signal of outside input was low level, described photoelectrical coupler (U1) was output as cut-off state, made the triode (Q1) of back also be cut-off state, and relay this moment (K1) is in off-state; When the control signal of outside input was high level, described photoelectrical coupler (U1) was output as conducting state, made the triode (Q1) of back also be conducting state, and relay this moment (K1) is in closure state.
In the present embodiment, be provided with diode (D2) between the collector electrode of described triode (Q1) and the resistance (R2).
Claims (2)
1. control relay circuit, it is characterized in that comprising relay (K1), photoelectrical coupler (U1) and triode (Q1), the two ends of described relay (K1) input are provided with diode (D1), the grounded emitter of described triode (Q1), the collector electrode of described triode (Q1) is electrically connected with described diode (D1), the output of the base stage of described triode (Q1) by resistance (R1) and photoelectrical coupler (U1) wherein end is electrically connected, another termination power of output of photoelectrical coupler (U1), the positive pole of the control end of described photoelectrical coupler (U1) is connected with external control signal by resistance (R4), the negative pole of the control end of described photoelectrical coupler (U1) is by resistance (R3) ground connection, and described diode (D1) two ends are provided with resistance (R2).
2. control relay circuit as claimed in claim 1 is characterized in that being provided with diode (D2) between the collector electrode of described triode (Q1) and the resistance (R2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320171251 CN203118869U (en) | 2013-03-28 | 2013-03-28 | Relay control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320171251 CN203118869U (en) | 2013-03-28 | 2013-03-28 | Relay control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203118869U true CN203118869U (en) | 2013-08-07 |
Family
ID=48899191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320171251 Expired - Fee Related CN203118869U (en) | 2013-03-28 | 2013-03-28 | Relay control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203118869U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767505A (en) * | 2015-03-26 | 2015-07-08 | 成都力鑫科技有限公司 | Switching circuit with circuit protection function |
| CN104793516A (en) * | 2015-03-26 | 2015-07-22 | 成都力鑫科技有限公司 | Control switch for garbage briquetting control system |
| CN110460158A (en) * | 2019-08-15 | 2019-11-15 | 中国科学院紫金山天文台 | A kind of astronomical telescope instrument and equipment remote power supply distribution system |
-
2013
- 2013-03-28 CN CN 201320171251 patent/CN203118869U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767505A (en) * | 2015-03-26 | 2015-07-08 | 成都力鑫科技有限公司 | Switching circuit with circuit protection function |
| CN104793516A (en) * | 2015-03-26 | 2015-07-22 | 成都力鑫科技有限公司 | Control switch for garbage briquetting control system |
| CN110460158A (en) * | 2019-08-15 | 2019-11-15 | 中国科学院紫金山天文台 | A kind of astronomical telescope instrument and equipment remote power supply distribution system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20140328 |