CN205583849U - Isolated form DC power supply panel monitoring module - Google Patents
Isolated form DC power supply panel monitoring module Download PDFInfo
- Publication number
- CN205583849U CN205583849U CN201620324887.4U CN201620324887U CN205583849U CN 205583849 U CN205583849 U CN 205583849U CN 201620324887 U CN201620324887 U CN 201620324887U CN 205583849 U CN205583849 U CN 205583849U
- Authority
- CN
- China
- Prior art keywords
- supply voltage
- power supply
- resistance
- optocoupler
- ground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
The utility model provides an isolated form DC power supply panel monitoring module, including MCU, still include: optical coupling isolation circuit, RS485 transceiver circuits and isolated form power supply circuit, isolated form power supply circuit makes win power supply voltage VDD and the 2nd power supply voltage VDD1 mutual isolation, and make win with second ground yet mutual isolation, MCU outgoing letter number is through optical coupling isolation circuit connection to RS485 transceiver circuits, through RS485 transceiver circuits and host computer communication, in the optical coupling isolation circuit, the partial circuit before the optical coupling isolation adopts power supply voltage VDD power supply, not ground connection to first ground, and the partial circuit behind the optical coupling isolation adopts the power supply of the 2nd power supply voltage VDD1, ground connection to second ground, RS485 transceiver circuits adopts the power supply of the 2nd power supply voltage VDD1, ground connection to second ground.
Description
Technical field
This utility model relates to DC power supply panel supervisory circuit, the DC power supply panel monitoring module that the communication between a kind of and host computer is mutually isolated.
Background technology
Power plant, transformer station are as the operation power supply of the uses such as the normal divide-shut brake of primary cut-out DC operation mechanism, relay protection, signal, and divide-shut brake, illumination during accident, control the DC source of communication etc., are required to DC power supply panel；Along with electricity consumption gets more and more, DC power supply panel consumption also increases as, large and medium-sized projects will be used multiple stage DC power supply panel, manage and understand the duty of each DC power supply panel for convenience, these DC power supply panels are all connected to host computer by 485 buses, and every DC power supply panel sends host computer to by 485 bus real time information.In DC power supply panel, bad or short-circuit etc. the reason of unavoidable insulation, when occurring the faults such as short circuit in a DC power supply panel, many times can affect the 485 normal communications of bus.As long as reason is likely to cause system 485 bus communication cisco unity malfunction therefore to have DC power supply panel line insulation bad or short-circuit etc..
Summary of the invention
For the deficiencies in the prior art, this utility model provides a kind of isolated DC power supply panel monitoring module, making DC power supply panel is isolation with the communication of host computer each other, it is possible to changes traditional DC power supply panel and there are interactional 485 bus communication problems.The technical solution adopted in the utility model is:
A kind of isolated DC power supply panel monitoring module, including MCU, also includes: optical coupling isolation circuit, transmission circuit and isolated supplies circuit；
Isolated supplies circuit makes the first supply voltage VDD and the second supply voltage VDD1 mutually isolated, and makes the first ground and the second ground the most mutually isolated；
The signal that MCU sends is connected to transmission circuit by optical coupling isolation circuit, by transmission circuit and upper machine communication；
In optical coupling isolation circuit, the partial circuit before light-coupled isolation uses the first supply voltage VDD to power, and is grounded to the first ground, and the partial circuit after light-coupled isolation uses the second supply voltage VDD1 to power, and is grounded to the second ground；RS485 transmission circuit uses the second supply voltage VDD1 to power, and is grounded to the second ground.
Further, described transmission circuit uses RS485 transmission circuit.
Specifically, isolated supplies circuit includes insulating power supply module U1, electric capacity C1, C2, C3, C4；First supply voltage VDD connects one end of electric capacity C1, C2 and the side positive pole of insulating power supply module U1, the other end of electric capacity C1, C2 and the side negative pole of insulating power supply module U1 and connects the first ground；The opposite side positive pole of insulating power supply module U1 exports one end of second supply voltage VDD1 shunt-wound capacitance C3, C4；The opposite side negative pole of insulating power supply module U1 connects the second ground and the other end of electric capacity C3, C4.
Specifically, optical coupling isolation circuit includes: optocoupler U2, U3, U4, PNP triode Q1, resistance R1, R2, R3, R4, R5, R6, R7；
The outfan colelctor electrode receiving signal termination optocoupler U2 of MCU, and meet the first supply voltage VDD by resistance R1；The outfan emitter stage of optocoupler U2 connects the first ground；The outfan power pole of optocoupler U2 meets the first supply voltage VDD；The input anode of optocoupler U2 meets the second supply voltage VDD1, and the input negative electrode of optocoupler U2 connects the receptor outfan of RS485 transceiving chip U5 in RS485 transmission circuit by resistance R4；
The signal end that sends of MCU connects the input negative electrode of optocoupler U4 by resistance R3, and the input anode of optocoupler U4 meets the first supply voltage VDD, and the outfan power pole of optocoupler U4 meets the second supply voltage VDD1；The outfan emitter stage of optocoupler U4 connects the second ground；The outfan colelctor electrode of optocoupler U4 meets the second supply voltage VDD1 by resistance R7, and the outfan colelctor electrode of U4 connects the driver input end of RS485 transceiving chip U5 in RS485 transmission circuit；
The control signal end of MCU connects the input negative electrode of optocoupler U3 by resistance R2, and the input anode of optocoupler U3 meets the first supply voltage VDD, and the outfan power pole of optocoupler U3 meets the second supply voltage VDD1, and the outfan emitter stage of optocoupler U3 connects the second ground；The outfan colelctor electrode of optocoupler U3 meets the second supply voltage VDD1 by resistance R5, and is connect the base stage of audion Q1 by resistance R6；The emitter stage of audion Q1 meets the second supply voltage VDD1, and colelctor electrode connects receptor Enable Pin and the driver Enable Pin of RS485 transceiving chip U5 in RS485 transmission circuit, and the colelctor electrode of audion Q1 connects the second ground by resistance R8；
RS485 transmission circuit includes RS485 transceiving chip U5, resistance R9, R10, R11, R12；Transient voltage killer tube D1；Insurance F1 and F2；
The power supply termination second supply voltage VDD1 of RS485 transceiving chip U5 and one end of resistance R9；Ground connection terminates the second ground and one end of resistance R12；First sending and receiving end of RS485 transceiving chip U5 and the second sending and receiving end are respectively by resistance R10 and the other end of R11 connecting resistance R9 and the other end of resistance R12；Another of resistance R9 terminates the negative electrode of transient voltage killer tube D1 and by insurance F1 as the first receiving and transmitting signal line；Another of resistance R12 terminates the anode of transient voltage killer tube D1 and by insurance F2 as the second receiving and transmitting signal line.
The utility model has the advantage of: when in the multiple DC power supply panels being connected with host computer some be short-circuited fault time, host computer is unaffected with the communication of other DC power supply panel monitoring module, still keeps unimpeded.
Accompanying drawing explanation
Fig. 1 is electrical schematic diagram of the present utility model.
Fig. 2 is isolated supplies circuit theory diagrams of the present utility model.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
The isolated DC power supply panel monitoring module that this utility model provides, including MCU, and optical coupling isolation circuit 10, RS485 transmission circuit 20 and isolated supplies circuit 30；In Fig. 1, MCU is not drawn into, and hereby illustrates；
Isolated supplies circuit 30 makes the first supply voltage VDD and the second supply voltage VDD1 mutually isolated, and makes the first ground and the second ground (DGND in Fig. 1) the most mutually isolated；
The signal that MCU sends is connected to RS485 transmission circuit 20, by RS485 transmission circuit 20 and upper machine communication by optical coupling isolation circuit 10；
In optical coupling isolation circuit 10, the partial circuit before light-coupled isolation uses the first supply voltage VDD to power, and is grounded to the first ground, and the partial circuit after light-coupled isolation uses the second supply voltage VDD1 to power, and is grounded to the second ground；RS485 transmission circuit 20 uses the second supply voltage VDD1 to power, and is grounded to the second ground；
Optocoupler refers to photoelectrical coupler；
Specifically, isolated supplies circuit 30 includes insulating power supply module U1, electric capacity C1, C2, C3, C4；First supply voltage VDD connects one end of electric capacity C1, C2 and the side positive pole of insulating power supply module U1, the other end of electric capacity C1, C2 and the side negative pole of insulating power supply module U1 and connects the first ground；The opposite side positive pole of insulating power supply module U1 exports one end of second supply voltage VDD1 shunt-wound capacitance C3, C4；The opposite side negative pole of insulating power supply module U1 connects the second ground and the other end of electric capacity C3, C4.Wherein, U1 uses 13D-05S05NCNL, electric capacity C2 and C3 can use electrochemical capacitor；C2 value 220 μ F, C3 value 10 μ F；
Specifically, optical coupling isolation circuit 10 includes: optocoupler U2, U3, U4, PNP triode Q1, resistance R1, R2, R3, R4, R5, R6, R7；
The outfan colelctor electrode receiving signal termination optocoupler U2 of MCU, and meet the first supply voltage VDD by resistance R1；The outfan emitter stage of optocoupler U2 connects the first ground；The outfan power pole of optocoupler U2 meets the first supply voltage VDD；The input anode of optocoupler U2 meets the second supply voltage VDD1, and the input negative electrode of optocoupler U2 connects the receptor outfan of RS485 transceiving chip U5 in RS485 transmission circuit 20 by resistance R4；
The signal end that sends of MCU connects the input negative electrode of optocoupler U4 by resistance R3, and the input anode of optocoupler U4 meets the first supply voltage VDD, and the outfan power pole of optocoupler U4 meets the second supply voltage VDD1；The outfan emitter stage of optocoupler U4 connects the second ground；The outfan colelctor electrode of optocoupler U4 meets the second supply voltage VDD1 by resistance R7, and the outfan colelctor electrode of U4 connects the driver input end of RS485 transceiving chip U5 in RS485 transmission circuit 20；
The control signal end (the P36 port of MCU in this example) of MCU connects the input negative electrode of optocoupler U3 by resistance R2, the input anode of optocoupler U3 meets the first supply voltage VDD, the outfan power pole of optocoupler U3 meets the second supply voltage VDD1, and the outfan emitter stage of optocoupler U3 connects the second ground；The outfan colelctor electrode of optocoupler U3 meets the second supply voltage VDD1 by resistance R5, and is connect the base stage of audion Q1 by resistance R6；The emitter stage of audion Q1 meets the second supply voltage VDD1, and colelctor electrode connects receptor Enable Pin and the driver Enable Pin of RS485 transceiving chip U5 in RS485 transmission circuit 20, and the colelctor electrode of audion Q1 connects the second ground by resistance R8；
Specifically, RS485 transmission circuit 20 includes RS485 transceiving chip U5, resistance R9, R10, R11, R12；Transient voltage killer tube D1；Insurance F1 and F2；
The power supply termination second supply voltage VDD1 of RS485 transceiving chip U5 and one end of resistance R9；Ground connection terminates the second ground and one end of resistance R12；First sending and receiving end of RS485 transceiving chip U5 and the second sending and receiving end are respectively by resistance R10 and the other end of R11 connecting resistance R9 and the other end of resistance R12；Another of resistance R9 terminates the negative electrode of transient voltage killer tube D1 and by insurance F1 as the first receiving and transmitting signal line；Another of resistance R12 terminates the anode of transient voltage killer tube D1 and by insurance F2 as the second receiving and transmitting signal line.
U5 is used receptor outfan RD, the driver input end DI of MAX485, U5 and controls transmitting-receiving port (receptor Enable Pin/RE and driver Enable Pin DE) and communicated by related port with MCU after light-coupled isolation；In order to play completely and the isolation of DC power supply panel built-in system, increasing insulating power supply module U1, the side deviating from MCU being individually for RS485 transceiving chip U5 and optocoupler powers；During the control signal end output low level of MCU, the monitoring information that DC power supply panel gathers is sent to host computer；During my high level of control signal end of MCU, DC power supply panel monitoring module receives host computer instruction；
Circuit in DC power supply panel monitoring module is 485 circuit with upper machine communication, be ensure that the stability of whole system communication by insulating power supply and quick light Rhizoma Nelumbinis, and the working condition of each DC power supply panel is checked by host computer by Surveillance center.Will not be again because bad or short-circuit etc. the cause influence 485 bus normal communication of DC power supply panel built-in electrical insulation.
Claims (4)
1. an isolated DC power supply panel monitoring module, including MCU, it is characterised in that also include: optical coupling isolation circuit (10), transmission circuit and isolated supplies circuit (30)；
Isolated supplies circuit (30) makes the first supply voltage VDD and the second supply voltage VDD1 mutually isolated, and makes the first ground and the second ground the most mutually isolated；
The signal that MCU sends is connected to transmission circuit, by transmission circuit and upper machine communication by optical coupling isolation circuit (10)；
In optical coupling isolation circuit (10), the partial circuit before light-coupled isolation uses the first supply voltage VDD to power, and is grounded to the first ground, and the partial circuit after light-coupled isolation uses the second supply voltage VDD1 to power, and is grounded to the second ground；Transmission circuit uses the second supply voltage VDD1 to power, and is grounded to the second ground.
2. isolated DC power supply panel monitoring module as claimed in claim 1, it is characterised in that:
Described transmission circuit uses RS485 transmission circuit (20).
3. isolated DC power supply panel monitoring module as claimed in claim 1, it is characterised in that:
Isolated supplies circuit (30) includes insulating power supply module U1, electric capacity C1, C2, C3, C4；First supply voltage VDD connects one end of electric capacity C1, C2 and the side positive pole of insulating power supply module U1, the other end of electric capacity C1, C2 and the side negative pole of insulating power supply module U1 and connects the first ground；The opposite side positive pole of insulating power supply module U1 exports one end of second supply voltage VDD1 shunt-wound capacitance C3, C4；The opposite side negative pole of insulating power supply module U1 connects the second ground and the other end of electric capacity C3, C4.
4. isolated DC power supply panel monitoring module as claimed in claim 2, it is characterised in that:
Optical coupling isolation circuit (10) including: optocoupler U2, U3, U4, PNP triode Q1, resistance R1, R2, R3, R4, R5, R6, R7；
The outfan colelctor electrode receiving signal termination optocoupler U2 of MCU, and meet the first supply voltage VDD by resistance R1；The outfan emitter stage of optocoupler U2 connects the first ground；The outfan power pole of optocoupler U2 meets the first supply voltage VDD；The input anode of optocoupler U2 meets the second supply voltage VDD1, and the input negative electrode of optocoupler U2 connects the receptor outfan of RS485 transceiving chip U5 in RS485 transmission circuit (20) by resistance R4；
The signal end that sends of MCU connects the input negative electrode of optocoupler U4 by resistance R3, and the input anode of optocoupler U4 meets the first supply voltage VDD, and the outfan power pole of optocoupler U4 meets the second supply voltage VDD1；The outfan emitter stage of optocoupler U4 connects the second ground；The outfan colelctor electrode of optocoupler U4 meets the second supply voltage VDD1 by resistance R7, and the outfan colelctor electrode of U4 connects the driver input end of RS485 transceiving chip U5 in RS485 transmission circuit (20)；
The control signal end of MCU connects the input negative electrode of optocoupler U3 by resistance R2, and the input anode of optocoupler U3 meets the first supply voltage VDD, and the outfan power pole of optocoupler U3 meets the second supply voltage VDD1, and the outfan emitter stage of optocoupler U3 connects the second ground；The outfan colelctor electrode of optocoupler U3 meets the second supply voltage VDD1 by resistance R5, and is connect the base stage of audion Q1 by resistance R6；The emitter stage of audion Q1 meets the second supply voltage VDD1, and colelctor electrode connects receptor Enable Pin and the driver Enable Pin of RS485 transceiving chip U5 in RS485 transmission circuit (20), and the colelctor electrode of audion Q1 connects the second ground by resistance R8；
RS485 transmission circuit (20) includes RS485 transceiving chip U5, resistance R9, R10, R11, R12；Transient voltage killer tube D1；Insurance F1 and F2；
The power supply termination second supply voltage VDD1 of RS485 transceiving chip U5 and one end of resistance R9；Ground connection terminates the second ground and one end of resistance R12；First sending and receiving end of RS485 transceiving chip U5 and the second sending and receiving end are respectively by resistance R10 and the other end of R11 connecting resistance R9 and the other end of resistance R12；Another of resistance R9 terminates the negative electrode of transient voltage killer tube D1 and by insurance F1 as the first receiving and transmitting signal line；Another of resistance R12 terminates the anode of transient voltage killer tube D1 and by insurance F2 as the second receiving and transmitting signal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620324887.4U CN205583849U (en) | 2016-04-18 | 2016-04-18 | Isolated form DC power supply panel monitoring module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620324887.4U CN205583849U (en) | 2016-04-18 | 2016-04-18 | Isolated form DC power supply panel monitoring module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205583849U true CN205583849U (en) | 2016-09-14 |
Family
ID=56862150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620324887.4U Expired - Fee Related CN205583849U (en) | 2016-04-18 | 2016-04-18 | Isolated form DC power supply panel monitoring module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205583849U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132473A (en) * | 2017-05-17 | 2017-09-05 | 肇庆三向教学仪器制造有限公司 | A kind of low-voltage intelligent monitoring terminal |
-
2016
- 2016-04-18 CN CN201620324887.4U patent/CN205583849U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132473A (en) * | 2017-05-17 | 2017-09-05 | 肇庆三向教学仪器制造有限公司 | A kind of low-voltage intelligent monitoring terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103075782B (en) | Non-polar power supplying communication system of multi-connection type air conditioner | |
| CN107645310B (en) | The data transmission device and data transmission method of breaker controller | |
| CN109343396A (en) | A kind of and machine CAN build-out resistor automatic identification circuit | |
| CN205754408U (en) | A kind of switch with forward and reverse function of supplying power | |
| CN205583849U (en) | Isolated form DC power supply panel monitoring module | |
| CN208766506U (en) | A kind of and machine CAN build-out resistor automatic identification circuit and CAN and machine equipment | |
| CN210536655U (en) | Mining anti-interference communication module | |
| CN207098599U (en) | A kind of arc light protection system for fiber optic communication | |
| CN206757335U (en) | A kind of scan module | |
| CN207303271U (en) | Battery pack monitoring device | |
| CN203445871U (en) | RS485 communication circuit | |
| CN207652308U (en) | Control the circuit of business board on/off | |
| CN208781044U (en) | Hydraulic support electronic control system signal coupler | |
| CN205210536U (en) | Digital output module of redundant output based on special CPU | |
| CN203178400U (en) | Short circuit and ground fault indicator and distribution automation system | |
| CN101359826B (en) | Communication protecting equipment | |
| CN109039270B (en) | Header box circuit of intelligent photovoltaic power station simulator | |
| CN203734678U (en) | Leaky cable detection device and system | |
| CN206894265U (en) | A kind of plug in rifle wake-up circuit | |
| CN106533403A (en) | High-performance isolation, distribution and amplification equipment | |
| CN205864075U (en) | A kind of active power distribution network intelligent terminal's accumulator isolation monitoring device | |
| CN202737865U (en) | PHY TO PHY onboard connection device in short-distance communication | |
| CN212334288U (en) | Multi-channel elevator data acquisition system based on 4G transmission | |
| CN110958055B (en) | RS485 communication isolation protection circuit with three-layer protection | |
| CN219513850U (en) | Photovoltaic grid-connected switch based on Bluetooth communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160914 Termination date: 20210418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |