CN109217854A - It is applicable in the indicating circuit of two kinds of level driving - Google Patents
It is applicable in the indicating circuit of two kinds of level driving Download PDFInfo
- Publication number
- CN109217854A CN109217854A CN201710538118.3A CN201710538118A CN109217854A CN 109217854 A CN109217854 A CN 109217854A CN 201710538118 A CN201710538118 A CN 201710538118A CN 109217854 A CN109217854 A CN 109217854A
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- CN
- China
- Prior art keywords
- interface
- level
- indicating circuit
- kinds
- power supply
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/002—Switching arrangements with several input- or output terminals
- H03K17/005—Switching arrangements with several input- or output terminals with several inputs only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/18—Modifications for indicating state of switch
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The present invention relates to the indicating circuits for being applicable in the driving of two kinds of level, the power supply of a voltage class is separately connected by the primary and secondary side of optocoupler, with one for connecting the interface of driving signal corresponding with the power supply, the light emitting diode of indicating circuit of the present invention can be driven when two kinds of level drive signals are effective, realize the indicative function to power supply, indicating circuit principle of the invention is simple, it can be adapted to two kinds of level drive signals simultaneously, when needing with the first power supply, the driving signal of first power supply accesses first interface, indicating circuit of the invention is connected, when needing with second source, the driving signal of second source accesses second interface, indicating circuit of the invention is connected, first interface and second interface, which connect, to be used, it is flexible to operation.
Description
Technical field
The invention belongs to relay protection level actuation techniques fields, and in particular to be applicable in the instruction electricity of two kinds of level drivings
Road.
Background technique
The indicating circuit of level driving in relay protection is separated design, is designed to independent level driving instruction electricity
Road, indicating circuit as shown in Figure 1, power supply VCC are connected to driving by sequentially connected current-limiting resistance R, Light-emitting diode LED
On signaling interface, when the effective driving signal of the low level that the driving signal interface is connected to power supply VCC, in the indicating circuit
LEDs ON plays the role of the level driving instruction under the power supply.
In relay protection level drive area, current most commonly used level is 5V and 24V.For example, what general CPU was used
It is the driving signal of 5V, and exit relay uses the driving signal of 24V.The finger of the driving signal of current man-machine interface
Show that circuit only supports the indicating circuit of single level driving, that is, indicating circuit or the driving of 24V level of the driving of 5V level
Indicating circuit.
When needing to show level drive signal, need for the mating individual instruction electricity of the level drive signal
Road needs replacing corresponding mating indicating circuit, cannot adopt when needing to show different level drive signals
It is suitable for the display effect of two different level drive signals simultaneously with a set of indicating circuit, that is, indicating circuit cannot root
According to needing while being suitable for two kinds of level drivings, application is not flexible, and adaptive ability is poor.Man-machine interface use it is this more
The method for changing set indicating circuit, not only versatility is poor, increases cost, but also can bring very big fiber crops in practical applications
It is tired, it is unable to satisfy the demand that indicating circuit all the way adapts to different voltages grade drive level.
Summary of the invention
The object of the present invention is to provide a kind of indicating circuits for being applicable in the driving of two kinds of level, for solving existing indicating circuit
The problem of can not being suitable for two kinds of level drivings simultaneously.
In order to solve the above technical problems, the present invention proposes a kind of indicating circuit for being applicable in the driving of two kinds of level, including optocoupler,
Two ports of optocoupler primary side are separately connected the first power interface and first interface, and first power interface is for connecting first
Power supply, the first interface are used to connect the low level signal of the first power supply；The a port of optical coupling secondary edges connects second source
Interface, another port are grounded by instruction device, which also passes through counnter attack diode and be connected with second interface, institute
Second interface is stated for connecting the high level signal of second source, the second source interface is for connecting second source.
First power interface connects a port of the optocoupler primary side by the first resistor being arranged.
Two ports of the optocoupler primary side are connected with second resistance.
The instruction device is light emitting diode.
The counnter attack diode connects the light emitting diode by 3rd resistor.
The beneficial effects of the present invention are: the power supply of a voltage class is separately connected by the primary and secondary side of optocoupler, and
One, for connecting the interface of driving signal corresponding with the power supply, can drive this hair when two kinds of level drive signals are effective
The instruction device of bright indicating circuit realizes that indicating circuit principle of the invention is simple, can adapt to simultaneously to the indicative function of power supply
In two kinds of level drive signals, when needing with the first power supply, the driving signal of the first power supply accesses first interface, this hair is connected
Bright indicating circuit, when needing with second source, the driving signal of second source accesses second interface, and finger of the invention is connected
Show circuit, first interface and second interface, which connect, to be used, flexible to operation.
Detailed description of the invention
Fig. 1 is indicating circuit schematic diagram in the prior art；
Fig. 2 is indicating circuit schematic diagram of the invention.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing.
The of the invention indicating circuit for being applicable in the driving of two kinds of level as shown in Fig. 2, include optocoupler OP1, optocoupler OP1 primary side
Two ports are separately connected the first power interface and first interface XH1, and the first power interface connects the first power supply, such as 5V power supply,
5V power supply passes through a port of current-limiting resistance R1 connection optocoupler OP1 primary side, the i.e. anode of optocoupler OP1 primary side diode, the light
Two ports of the primary side of coupling are also connected in parallel to threshold resistance R2.Two ports on optocoupler OP1 pair side are separately connected the second electricity
Source interface and second interface XH2, second source interface are connected with second source, such as 24V power supply, as shown in Fig. 2, second interface
XH2 passes through a port on counnter attack diode D1 connection optocoupler OP1 pair side, and second interface XH2 also passes through two pole of counnter attack respectively
The anode of pipe D1, current-limiting resistance R3 connection Light-emitting diode LED, the power ground of the cathode connection 24V of Light-emitting diode LED.
The resistance value of above-mentioned current-limiting resistance R1 is determined that the purpose of setting threshold resistance R2 is by input voltage and optocoupler characteristic
It prevents the diode of optocoupler from misleading, improves circuit stability, reason is: the present invention needs two poles of power supply optocoupler in 5V
Pipe is just connected, and cannot trigger the diode of optocoupler when supply voltage is less than 5V, such as when voltage is 3V, threshold resistance R2 and electricity
Leakage resistance R1 partial pressure, makes threshold resistance R2 divide to obtain smaller voltage, so that the diode of threshold resistance R2 and optocoupler is identical
Under small voltage, threshold resistance R2 can play shunting function, it is ensured that the diode of optocoupler cannot be connected.The resistance value of current-limiting resistance R3
It is determined by LED characteristic and input voltage, provides a matched operating current for LED, adjust LED luminance；Light emitting diode
LED is used for when receiving level drive signal, to indicate driving signal；GND is power ground, constitutes circuit with 24V.
The working principle of indicating circuit of the invention is as follows:
When needing the driving signal of 5V power supply, and the driving signal is that low level is effective, by driving signal access the
One interface XH1, the conducting of optocoupler OP1 primary side, two ports conducting of optical coupling secondary edges, upper end, lower end are regarded as 24V, and
Used current-limiting resistance R3 circuit switched-on light emitting diodes LED after Light-emitting diode LED is lighted, drives the low level of 5V power supply
Signal is indicated.
When needing the driving signal of 24V power supply, and the driving signal is that high level is effective, by driving signal access the
Two interface XH2, since the interface XH1 of optocoupler primary side does not access driving signal, so optocoupler primary side is not turned on.And optical coupling secondary edges
A port is connected with second interface XH2 by diode D1, and the interface is connected with the effective driving signal of high level, driving
Signal is 24V, which the branch where diode D1, current-limiting resistance R3, Light-emitting diode LED is connected, luminous two
Pole pipe LED is lighted, and is indicated the high level driving signal of 24V power supply.
In Fig. 2, diode D1 of the invention is used to control the flow direction of electric current, it is ensured that when driving signal accesses first interface
When XH1, electric current will not flow to second interface XH2, to influence the state of second interface XH2 connection signal.
Indicating circuit of the invention can adapt to 5V level and the driving of 24V level simultaneously, and versatility is stronger, when signal is 5V
When level drives, XH1 is accessed, when signal is that 24V level drives, XH2 is accessed, that is, connects and use, it is convenient, flexible, easily
In operation.Also, circuit design is simple, and only by an optocoupler OP1, optocoupler primary side, secondary side are respectively connected to 5V, 24V power supply, connect
Mouth XH1 and 5V plant-grid connection the same circuit, interface XH2 and 24V plant-grid connection the same circuit can be achieved with double level drive signals
Indicative function save space for the design of pcb board, while saving and setting instead of original two independent indicating circuits
Count cost.In addition, the light emitting diode in indicating circuit of the present invention can be replaced using other instruction devices, such as indicator light.
First interface XH1 connection of the invention be the driving of 5V level signal, and low level is effective；Second interface XH2
Connection is 24V level drive signal, and high level is effective.As other embodiments, first interface XH1, second interface XH2 connect
What is connect can be the driving signal of the supply voltage of other voltage class.
The above description is only a preferred embodiment of the present invention, does not limit excessively level voltage grade, when replacement power supply
Voltage class 5V is V1, and when 24V is V2, V1, V2 are respectively the level of actual demand, can be free voltage grade, Yi Jiyu
Matched component, be equally adapted to other voltage class level driving demand.
Claims (5)
1. a kind of indicating circuit for being applicable in the driving of two kinds of level, which is characterized in that including optocoupler, two ports point of optocoupler primary side
The first power interface and first interface are not connected, and first power interface is used for connecting the first power supply, the first interface
In the low level signal for connecting the first power supply；The a port connection second source interface of optical coupling secondary edges, another port pass through
Instruction device ground connection, another port also pass through counnter attack diode and are connected with second interface, and the second interface is for connecting
The high level signal of second source, the second source interface is for connecting second source.
2. the indicating circuit according to claim 1 for being applicable in the driving of two kinds of level, which is characterized in that first power supply connects
Mouth connects a port of the optocoupler primary side by the first resistor being arranged.
3. the indicating circuit according to claim 1 for being applicable in the driving of two kinds of level, which is characterized in that the optocoupler primary side
Two ports are connected with second resistance.
4. the indicating circuit according to claim 1 for being applicable in the driving of two kinds of level, which is characterized in that the instruction device is
Light emitting diode.
5. the indicating circuit according to claim 4 for being applicable in the driving of two kinds of level, which is characterized in that the counnter attack diode
The light emitting diode is connected by 3rd resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710538118.3A CN109217854B (en) | 2017-07-04 | 2017-07-04 | Indication circuit suitable for two level driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710538118.3A CN109217854B (en) | 2017-07-04 | 2017-07-04 | Indication circuit suitable for two level driving |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109217854A true CN109217854A (en) | 2019-01-15 |
| CN109217854B CN109217854B (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710538118.3A Active CN109217854B (en) | 2017-07-04 | 2017-07-04 | Indication circuit suitable for two level driving |
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Citations (9)
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|---|---|---|---|---|
| JP2007006673A (en) * | 2005-06-27 | 2007-01-11 | Hitachi Ltd | Digital protective relay system for main circuit of generator |
| CN2912060Y (en) * | 2006-06-18 | 2007-06-13 | 易宁 | Current limit protecting solid-state relay with combined instruction |
| CN103353556A (en) * | 2013-06-06 | 2013-10-16 | 国家电网公司 | Relay protection device pressboard outlet logic detection apparatus |
| US20140159693A1 (en) * | 2012-12-10 | 2014-06-12 | Chengdu Monolithic Power Systems Co., Ltd. | Step-down switching mode power supply and the method thereof |
| CN103929238A (en) * | 2010-09-29 | 2014-07-16 | 江苏省电力公司常州供电公司 | Work method of optical path switching interface mechanism used for test of relay protection device |
| CN104251975A (en) * | 2013-09-18 | 2014-12-31 | 国家电网公司 | Mimic-disconnecting switch testing device for relay protection and control method thereof |
| CN205826822U (en) * | 2016-07-19 | 2016-12-21 | 南宏电力科技有限公司 | A kind of switch condition detection circuit of protective relaying device |
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| CN206096306U (en) * | 2016-10-11 | 2017-04-12 | 广东电网有限责任公司清远供电局 | Relay protection detection device that trips |
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2017
- 2017-07-04 CN CN201710538118.3A patent/CN109217854B/en active Active
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|---|---|---|---|---|
| JP2007006673A (en) * | 2005-06-27 | 2007-01-11 | Hitachi Ltd | Digital protective relay system for main circuit of generator |
| CN2912060Y (en) * | 2006-06-18 | 2007-06-13 | 易宁 | Current limit protecting solid-state relay with combined instruction |
| CN103929238A (en) * | 2010-09-29 | 2014-07-16 | 江苏省电力公司常州供电公司 | Work method of optical path switching interface mechanism used for test of relay protection device |
| US20140159693A1 (en) * | 2012-12-10 | 2014-06-12 | Chengdu Monolithic Power Systems Co., Ltd. | Step-down switching mode power supply and the method thereof |
| CN103353556A (en) * | 2013-06-06 | 2013-10-16 | 国家电网公司 | Relay protection device pressboard outlet logic detection apparatus |
| CN104251975A (en) * | 2013-09-18 | 2014-12-31 | 国家电网公司 | Mimic-disconnecting switch testing device for relay protection and control method thereof |
| CN205826822U (en) * | 2016-07-19 | 2016-12-21 | 南宏电力科技有限公司 | A kind of switch condition detection circuit of protective relaying device |
| CN106406169A (en) * | 2016-09-06 | 2017-02-15 | 许继电气股份有限公司 | I/O device for direct-current control protection system |
| CN206096306U (en) * | 2016-10-11 | 2017-04-12 | 广东电网有限责任公司清远供电局 | Relay protection detection device that trips |
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| CN109217854B (en) | 2023-06-02 |
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