CN201569107U - Relay output circuit with function of isolation for central air conditioning controller - Google Patents
Relay output circuit with function of isolation for central air conditioning controller Download PDFInfo
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- CN201569107U CN201569107U CN2009202377098U CN200920237709U CN201569107U CN 201569107 U CN201569107 U CN 201569107U CN 2009202377098 U CN2009202377098 U CN 2009202377098U CN 200920237709 U CN200920237709 U CN 200920237709U CN 201569107 U CN201569107 U CN 201569107U
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- coupling isolation
- optical coupling
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Abstract
A relay output circuit with a function of isolation for a central air conditioning controller comprises a relay, the output circuit of the relay comprises an photoelectric coupling isolation circuit, a drive circuit, the relay and an LED display circuit which are electrically and sequentially connected with one another, wherein the photoelectric coupling isolation circuit comprises a pull-up resistor R5, a photoelectric coupler IC5, a pull-down resistor R15 and a current-limiting resistor R10, the input end of the photoelectric coupling isolation circuit is connected with an input signal, the pull-up resistor R5 is connected with +5V to form a power supply of the photoelectric coupling isolation circuit, the first output end of the photoelectric coupling isolation circuit is connected with +12V, and the second output end of the photoelectric coupling isolation circuit is grounded through the pull-up resistor R5 and the current-limiting resistor R10, and outputs a high level signal to the drive circuit. The utility model has low fabrication cost, simple application and good stability, and can be widely applicable to the circuit designs of various industrial controls.
Description
Technical field
The utility model relates to a kind of relay output circuit with isolation, the relay output circuit that particularly a kind of band that is used for aircondition controller is isolated.
Background technology
In aircondition controller, the relay output circuit extensively applies to the adhesive control to control contactors such as water pump, blower fans, traditional relay output circuit because the dash current of relay coil can feed back to the single-chip processor i/o point, disturbs the normal operation of single-chip microcomputer.
The utility model content
The purpose of this utility model aim to provide a kind of simple and reasonable, cost of manufacture is low, the relay output circuit of avoiding interference such as external impact that the influence of single-chip microcomputer built-in system, the band that is used for aircondition controller stable, that safe coefficient is high, applied widely are isolated, to overcome weak point of the prior art.
A kind of relay output circuit that is used for the band isolation of aircondition controller by this purpose design, comprise relay, it is characterized in that the relay output circuit comprises optical coupling isolation circuit, drive circuit and relay and LED display circuit, optical coupling isolation circuit, drive circuit and relay and LED display circuit are electrically connected successively.
Described optical coupling isolation circuit comprises pull-up resistor R5, photoelectrical coupler IC5, pull down resistor R15 and current-limiting resistance R10, the input of optical coupling isolation circuit connects input signal, pull-up resistor R5 is connected the power supply that the back constitutes optical coupling isolation circuit with+5V, the first output connection+12V of optical coupling isolation circuit, second output of optical coupling isolation circuit is connected to ground by pull down resistor R15 and current-limiting resistance R10, and the output high level signal is given drive circuit.
The model of described photoelectrical coupler IC5 is PC521.
Described drive circuit is made of integrated circuit, one end of drive circuit connects optical coupling isolation circuit and receives the high level signal of its output, and the other end of drive circuit is electrically connected and exports stable+12V voltage to drive relay and LED display circuit with driving relay and LED display circuit.
The model of described integrated circuit is ULN2003.
Described relay and LED display circuit comprise current-limiting resistance R20, LED 5 and relay R L5, current-limiting resistance R20 and LED 5 serial connection backs constitute branch road, one end of this branch road is electrically connected with+12V, the other end of this branch road is electrically connected with the other end of drive circuit, and the coils from parallel connection of coils of relay R L5 is at two ends of this branch road.
The model of described relay R L5 is G5NB-1A-E.
Described optical coupling isolation circuit, drive circuit and relay and LED display circuit are respectively more than one.
The utility model is by the once isolation of optocoupler and the secondary isolation of relay, solved the complete isolating problem of relay output circuit and single-chip processor i/o pin, make single-chip microcomputer be in a quite outstanding electromagnetic environment, controller EMC performance promotes greatly, has also promoted device security simultaneously.It also has the characteristics stable, that safe coefficient is high, and has passed through every test by the CE standard except having the output of isolating single-chip microcomputer, isolating the function that forceful electric power and weakness, operation indicate.
The utlity model has cost of manufacture low, use simple, good stability, can be widely used in the characteristics of the circuit design of various Industry Control.
Description of drawings
Fig. 1 is that the circuit of the utility model one embodiment connects block diagram.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Referring to Fig. 1, originally be used for the relay output circuit of the band isolation of aircondition controller, comprise optical coupling isolation circuit 1, drive circuit 2 and relay and LED display circuit 3, optical coupling isolation circuit, drive circuit and relay and LED display circuit are electrically connected successively.Optical coupling isolation circuit 1 wherein, drive circuit 2 and relay and LED display circuit 3 are respectively more than one.Provided five optical coupling isolation circuits 1 and five relays and LED display circuit 3 among the figure and be connected to a concrete structure on the drive circuit 2, five optical coupling isolation circuits 1 and five relays and LED display circuit 3 are symmetric circuit.
Optical coupling isolation circuit 1 comprises pull-up resistor R5, photoelectrical coupler IC5, pull down resistor R15 and current-limiting resistance R10, the input of optical coupling isolation circuit connects input signal O5, pull-up resistor R5 is connected the power supply that the back constitutes optical coupling isolation circuit 1 with+5V, make lumination of light emitting diode in the optocoupler coupler IC5, make optical coupling isolation circuit 1 output conducting.When the output conducting, the first output connection+12V of optical coupling isolation circuit 1, second output of optical coupling isolation circuit 1 is connected to ground by pull down resistor R15 and current-limiting resistance R10, and the output high level signal is given drive circuit 2.The model of photoelectrical coupler IC5 is PC521.
Relay and LED display circuit 3 comprise current-limiting resistance R20, LED 5 and relay R L5, current-limiting resistance R20 and LED 5 serial connection backs constitute branch road, one end of this branch road is electrically connected with+12V, the other end of this branch road is electrically connected with the other end of drive circuit 2, and the coils from parallel connection of coils of relay R L5 is at two ends of this branch road.
When drive circuit 2 output low levels, LED 5 is luminous.Meanwhile, the coil electricity of relay R L5, the relay adhesive is for equipment provides the relay output interface; It can drive the load of the following electric current restriction of 5A such as contactor, warning, fan.
The model of relay R L5 is the G5NB-1A-E of OMORON, and 12VDC drives, load 5A, 250VAC.
Claims (8)
1. relay output circuit that the band that is used for aircondition controller is isolated, comprise relay, it is characterized in that the relay output circuit comprises optical coupling isolation circuit (1), drive circuit (2) and relay and LED display circuit (3), optical coupling isolation circuit, drive circuit and relay and LED display circuit are electrically connected successively.
2. the relay output circuit that the band that is used for aircondition controller according to claim 1 is isolated, it is characterized in that described optical coupling isolation circuit (1) comprises pull-up resistor R5, photoelectrical coupler IC5, pull down resistor R15 and current-limiting resistance R10, the input of optical coupling isolation circuit connects input signal (O5), pull-up resistor R5 is connected the power supply that the back constitutes optical coupling isolation circuit with+5V, the first output connection+12V of optical coupling isolation circuit, second output of optical coupling isolation circuit is connected to ground by pull down resistor R15 and current-limiting resistance R10, and the output high level signal is given drive circuit (2).
3. the relay output circuit that the band that is used for aircondition controller according to claim 2 is isolated, the model that it is characterized in that described photoelectrical coupler IC5 is PC521.
4. the relay output circuit that the band that is used for aircondition controller according to claim 1 is isolated, it is characterized in that described drive circuit (2) is made of integrated circuit (IC6), one end of drive circuit connects optical coupling isolation circuit (1) and receives the high level signal of its output, and the other end of drive circuit is electrically connected and exports stable+12V voltage to drive relay and LED display circuit with driving relay and LED display circuit (3).
5. the relay output circuit that the band that is used for aircondition controller according to claim 4 is isolated, the model that it is characterized in that described integrated circuit (IC6) is ULN2003.
6. the relay output circuit that the band that is used for aircondition controller according to claim 1 is isolated, it is characterized in that described relay and LED display circuit (3) comprise current-limiting resistance R20, LED 5 and relay R L5, current-limiting resistance R20 and LED 5 serial connection backs constitute branch road, one end of this branch road is electrically connected with+12V, the other end of this branch road is electrically connected with the other end of drive circuit (2), and the coils from parallel connection of coils of relay R L5 is at two ends of this branch road.
7. the relay output circuit that the band that is used for aircondition controller according to claim 6 is isolated, the model that it is characterized in that described relay R L5 is G5NB-1A-E.
8. the relay output circuit that the band that is used for aircondition controller according to claim 1 is isolated is characterized in that described optical coupling isolation circuit (1), drive circuit (2) and relay and LED display circuit (3) are respectively more than one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202377098U CN201569107U (en) | 2009-10-23 | 2009-10-23 | Relay output circuit with function of isolation for central air conditioning controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202377098U CN201569107U (en) | 2009-10-23 | 2009-10-23 | Relay output circuit with function of isolation for central air conditioning controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201569107U true CN201569107U (en) | 2010-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202377098U Expired - Fee Related CN201569107U (en) | 2009-10-23 | 2009-10-23 | Relay output circuit with function of isolation for central air conditioning controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201569107U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102065351A (en) * | 2010-11-03 | 2011-05-18 | 苏州合欣美电子科技有限公司 | Audio driving circuit |
| CN104240413A (en) * | 2013-06-24 | 2014-12-24 | 中国计量学院 | Cooling fan system alarm circuit |
-
2009
- 2009-10-23 CN CN2009202377098U patent/CN201569107U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102065351A (en) * | 2010-11-03 | 2011-05-18 | 苏州合欣美电子科技有限公司 | Audio driving circuit |
| CN104240413A (en) * | 2013-06-24 | 2014-12-24 | 中国计量学院 | Cooling fan system alarm circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: MEIDI GENERAL REFRIGERATION APPARATUS CO., LTD., C Free format text: FORMER OWNER: MEIDI ELECTRIC APPLIANCES CO., LTD., GUANGDONG Effective date: 20101222 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 528300 PENGLAI ROAD, BEIJIAO TOWN, SHUNDE DISTRICT, FOSHAN CITY, GUANGDONG PROVINCE TO: 400000 TUOZHAN ZONE, YUMACHI INDUSTRIAL PARK, CHAYUAN NEW ZONE, NAN AN DISTRICT, CHONGQING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20101222 Address after: 400000 Development Zone of jade horse pond Industrial Park, new tea garden, Nan'an District, Chongqing Patentee after: Chongqing Midea General Refrigerating Equipment Co., Ltd. Address before: 528300 Penglai Road, Beijiao Town, Shunde District, Guangdong, Foshan Patentee before: Meidi Electric Appliances Co., Ltd., Guangdong |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100901 Termination date: 20131023 |