CN201001115Y - Interface switching circuit for data transmission circuit - Google Patents
Interface switching circuit for data transmission circuit Download PDFInfo
- Publication number
- CN201001115Y CN201001115Y CNU2006201732154U CN200620173215U CN201001115Y CN 201001115 Y CN201001115 Y CN 201001115Y CN U2006201732154 U CNU2006201732154 U CN U2006201732154U CN 200620173215 U CN200620173215 U CN 200620173215U CN 201001115 Y CN201001115 Y CN 201001115Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- socket
- data transmission
- coupling transformer
- transmission interface
- 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
Images
Abstract
The utility model discloses a network data transmission interface switching circuit, which comprises a city electricity network access terminal; a first TVS lightning protector which is connected at the city electricity network access terminal in parallel; a switching power supply which is connected at the two ends of the city electricity network access terminal; a first high frequency coupling transformer; a dual transient voltage suppression device which is arranged at the two ends of the first high frequency coupling transformer; a first low-frequency signal obstruction circuit which is connected at one end of the first high frequency coupling transformer; a second low-frequency signal obstruction circuit which is connected at the two ends of the city electricity network access terminal; a multipurpose data input socket which is respectively connected at the two ends of the first high frequency coupling transformer and the second low-frequency signal obstruction circuit, wherein one circuit is connected to the first high frequency coupling transformer through the first low-frequency signal obstruction circuit; and a common mode choke inductive circuit which is arranged between the switching power supply and the city electricity network access terminal and between the switching power supply and the second low-frequency signal obstruction circuit.
Description
Technical field
The utility model relates to a kind of data transmission interface circuit, especially relates to a kind of interface switching control circuit that is used for the network data transmission circuit.
Background technology
As shown in Figure 1, be a Network Transmission interface circuit of prior art, this circuit comprises: TVS anti-lightening protector RV1 is used to prevent thunderbolt and the civil power input overvoltage protection responded to; Overcurrent fuse F1; Mains switch S1; Common mode choke induction T2 is used for preventing that the high-frequency signal of civil power from disturbing Switching Power Supply, stops useful high-frequency data signal to enter Switching Power Supply, prevents that also the Switching Power Supply high-frequency signal from disturbing the high-frequency signal in the civil power; Filter capacitor C2, the high-frequency signal filtering by T1 prevents to disturb Switching Power Supply, absorbs Switching Power Supply and spreads out of the interference signal of coming, and prevents that the Switching Power Supply interference signal from disturbing normal high-frequency data signal by T2; High-frequency coupling capacitor C 1, the low frequency city signal of telecommunication that is used to isolate 50HZ is by required high-frequency data signal; Discharge resistance R1 shields, and the stored electric weight of C1 is used for giving out light after outage; High-frequency coupling transformer T1 is used for high-frequency signal is coupled to the receiving processing circuit of back level, and the high-frequency signal of back level output is sent in the electricity network by high-frequency coupling transformer T1.But this existing interface circuit can't be realized the switching between power line and the telephone wire.
As shown in Figure 2, a kind of Network Transmission interface circuit that provides for the applicant, be that this circuit comprises outside different with the disclosed scheme of Fig. 1: another TVS anti-lightening protector RV2 is used to prevent the indirect lightning strike of telephone wire and because the high pressure of misconnection civil power input; Relay G1 is used to switch civil power/RJ11 telephony interface and transmits as high-frequency data; RJ11 telephone line socket and RJ11 telephone line plug, 3, the 4 bipods line of answering the call wherein, the inner short circuit of 2,5 bipods; Transmission link indicator light LED1 is used to indicate current transmission medium, and LED1 is bright during the power line transmission data-signal, and LED1 goes out during the telephone wire transmission of data signals; Transmission link indicator light LED2 also is to be used to indicate current transmission medium, and LED2 is bright during the telephone wire transmission of data signals, and LED2 goes out during the power line transmission data-signal; Current-limiting resistance R2, current-limiting resistance R3; TVS (transient voltage inhibition) diode D1 is used to protect high-frequency coupling transformer T1, prevents that overvoltage from damaging; TVS diode D2 is used to protect high-frequency coupling transformer T1, prevents that overvoltage from damaging.This circuit can be realized the switching between power line and the telephone wire, but can only provide the switching between power line and the telephone wire, and owing to use relay to switch, make because the defective of relay self, owing to can't bear alternating voltage between the coil of general miniature relay and the contact above 1500V, so can't be by realizing 3000V, the safe isolation standard of 1 minute duration is subjected to certain restriction in the commutation circuit of network data transmission circuit is used.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of interface switching control circuit that is used for data transmission link, and the switching of multiple network transmission line interface not only can be provided, and applied widely, good reliability.
To achieve these goals, the utility model provides a kind of network data transmission interface switching control circuit, is connected in electricity network, and this commutation circuit comprises:
One electricity network incoming end;
One the one TVS anti-lightening protector, and be connected in described electricity network incoming end is used to prevent thunderbolt and the civil power input overvoltage protection responded to;
One Switching Power Supply is connected in described electricity network incoming end two ends, is used to provide power supply;
One first high-frequency coupling transformer is used for high-frequency data signal coupling and the output that will pass through;
A pair of transient voltage restraining device is arranged at the described first high-frequency coupling transformer two ends, is used for the described first high-frequency coupling transformer is carried out overvoltage protection;
One first low frequency signal intercepts circuit, is connected in the described first high-frequency coupling transformer, one end, is used to intercept the low frequency civil power and the dc signal that may occur, and by needed high-frequency data signal;
One second low frequency signal intercepts circuit, is connected in described electricity network incoming end two ends, in intercepting the low frequency civil power and the dc signal that may occur, and by needed high-frequency data signal;
Use the data input socket more one, connect described first high-frequency coupling transformer and described second low frequency signal respectively and intercept the circuit two ends, described first low frequency signal of wherein leading up to intercepts circuit and is connected to the described first high-frequency coupling transformer;
One common mode choke induction circuit, being arranged on described Switching Power Supply and described electricity network incoming end and described second low frequency signal intercepts between the circuit, be used to prevent the normal data-signal of high-frequency signal radiated interference of described Switching Power Supply, and prevent that the high-frequency signal in the civil power from disturbing described Switching Power Supply.
Above-mentioned network data transmission interface switching control circuit is characterized in that, also comprises one the 2nd TVS anti-lightening protector, and the described first high-frequency coupling transformer and described many with between the data input socket is set, and is used to prevent thunderbolt and the civil power input overvoltage protection responded to.
Above-mentioned network data transmission interface switching control circuit is characterized in that, described second low frequency signal intercepts circuit, comprises a pair of parallel resistor and electric capacity again, is separately positioned on described electricity network incoming end and described many with between the data input socket.
Above-mentioned network data transmission interface switching control circuit is characterized in that, described common mode choke induction circuit comprises one second high-frequency coupling transformer, and a high-frequency coupling electric capacity that is connected with the described second high-frequency coupling transformer.
Above-mentioned network data transmission interface switching control circuit is characterized in that, also is provided with an overcurrent protector between described electricity network incoming end and described common mode choke induction circuit.
Above-mentioned network data transmission interface switching control circuit is characterized in that, also is being provided with an on-off switch between described electricity network incoming end and described common mode choke induction circuit.
Above-mentioned network data transmission interface switching control circuit is characterized in that, the described pair of transient voltage inhibition diode that the transient voltage restraining device is a pair of opposite setting.
Above-mentioned network data transmission interface switching control circuit is characterized in that, described many be socket with the data input socket with at least 4 core pin.
Above-mentioned network data transmission interface switching control circuit is characterized in that, described many be JP1 socket, PS/2 socket, S-Video socket or VIVO socket with the data input socket.
Above-mentioned network data transmission interface switching control circuit is characterized in that, also comprises a plug that matches with described socket, described plug further connects a telephone wire coffret, perhaps a grid line coffret, perhaps a coaxial cable line coffret, perhaps a power line transmission interface.
The utility model adopts foregoing circuit not only can realize power line, telephone wire, grid line and coaxial line coffret, and can realize 3000V, and the safety of 1 minute duration is isolated.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is a kind of data transmission interface circuit diagram of prior art;
Fig. 2 is a kind of data transmission interface circuit diagram;
Fig. 3 is a data transmission interface commutation circuit schematic diagram of the present utility model;
Fig. 4 is the plug schematic diagram of realization telephone wire coffret of the present utility model;
Fig. 5 is the plug schematic diagram of realization grid line coffret of the present utility model;
Fig. 6 is the plug schematic diagram of realization coaxial line coffret of the present utility model;
Fig. 7 is the plug schematic diagram of realization power line coffret of the present utility model.
Embodiment
In specific embodiment of the utility model, disclosed a kind of interface switching control circuit, mainly comprise: a TVS anti-lightening protector 11 is used to prevent thunderbolt and the civil power input overvoltage protection responded to; Overcurrent fuse 12 is used for overcurrent protection; Mains switch 13; Common mode choke induction circuit 2, be used for preventing that the high-frequency signal of civil power from disturbing Switching Power Supply, stop useful high-frequency data signal to enter Switching Power Supply, also prevent the normal data-signal of Switching Power Supply high-frequency signal radiated interference, wherein, common mode choke induction circuit 2 comprises common mode choke induction 21 and filter capacitor 23, be used for preventing that the high-frequency signal of civil power from disturbing Switching Power Supply, stop useful high-frequency data signal to enter Switching Power Supply, prevent that also the Switching Power Supply high-frequency signal from disturbing the high-frequency data signal in the civil power; Switching Power Supply 20 is used to provide power supply; First low frequency signal intercepts circuit 5, comprises high-frequency coupling capacitor C 1, is used to isolate the low frequency and the direct current signal of JP1 socket input, by required high-frequency data signal, and discharge resistance R1, be used for protecting act on the stored electric weight of C1 of guaranteeing after outage, to give out light; The first high-frequency coupling transformer 9, the high-frequency signal that is used for passing through are coupled to the receiving processing circuit (not shown) of back level, and post processing electric circuit is band pass filter and the highly sensitive AD converter that inductance, resistance and electric capacity are formed.The high-frequency signal of the output of back level is sent in the JP1 socket 4 by this high-frequency coupling transformer 9; Two transient voltage restraining devices 7 comprise that first transient voltage of opposite setting suppresses diode D1 and second transient voltage inhibition diode D2, are used to protect the first high-frequency coupling transformer 9, prevent that overvoltage from damaging; The 2nd TVS anti-lightening protector 6 is provided with between this first high-frequency coupling transformer and the JP1 socket 4, is used to prevent thunderbolt and the civil power input overvoltage protection responded to; Second low frequency signal intercepts circuit 3, comprises a pair of capacitor C 3, C4 and resistance R 2, R3, is used for the signal of telecommunication every the city of low frequency 50HZ; by required high-frequency data signal; and the resistance R 2, the R3 that are used to discharge, be used to shield the electric weight that the C3 that gives out light, C4 are stored after outage.
In conjunction with Fig. 3 and Fig. 4-Fig. 7, the utility model preferred embodiment, this JP1 input socket 4 adopts 4 core pin sockets, be mated use be plug 30, wherein the pin 2 and 4 with this plug 30 links with 4,5 and 6,1,2 and 3 of RJ11 socket 31 respectively, just can realize the telephone wire coffret.The pin 2 and 4 of this plug 40 is linked with 1,2,3 and 4,5,6,7 and 8 of RJ145 socket 41 respectively, just can realize the grid line coffret.The pin 2 and 4 of this plug 50 is linked with 1,2 of BNC socket 51 pins respectively, just can realize the coaxial line coffret.With 1,2 and 3,4 difference short circuits of this plug 50, just can realize the power line coffret.
This interface switching control circuit that adopts the utility model not only can realize power line, telephone wire, grid line and coaxial line coffret, and can reach 3000V, the safety standard of 1 minute duration.
Certainly, the utility model also has the embodiment of other modes, also can adopt PS/2 socket (6 core), S-input socket and corresponding plug all can adopt the plug and socket of S-Video or VIVO as this input socket 4, wherein the S-Video plug and socket is 5 cores, and the plug and socket of VIVO is 9 cores.Though above-mentioned socket is had any different on the quantity of core pin, using method all is identical with catenation principle.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1, a kind of network data transmission interface switching control circuit is connected in electricity network, it is characterized in that, comprising:
One electricity network incoming end;
One the one TVS anti-lightening protector, and be connected in described electricity network incoming end is used to prevent thunderbolt and the civil power input overvoltage protection responded to;
One Switching Power Supply is connected in described electricity network incoming end two ends, is used to provide power supply;
One first high-frequency coupling transformer is used for high-frequency data signal coupling and the output that will pass through;
A pair of transient voltage restraining device is arranged at the described first high-frequency coupling transformer two ends, is used for the described first high-frequency coupling transformer is carried out overvoltage protection;
One first low frequency signal intercepts circuit, is connected in the described first high-frequency coupling transformer, one end, is used to intercept the low frequency civil power and the dc signal that may occur, and by needed high-frequency data signal;
One second low frequency signal intercepts circuit, is connected in described electricity network incoming end two ends, in intercepting the low frequency civil power and the dc signal that may occur, and by needed high-frequency data signal;
Use the data input socket more one, connect described first high-frequency coupling transformer and described second low frequency signal respectively and intercept the circuit two ends, described first low frequency signal of wherein leading up to intercepts circuit and is connected to the described first high-frequency coupling transformer;
One common mode choke induction circuit, being arranged on described Switching Power Supply and described electricity network incoming end and described second low frequency signal intercepts between the circuit, be used to prevent the normal data-signal of high-frequency signal radiated interference of described Switching Power Supply, and prevent that the high-frequency signal in the civil power from disturbing described Switching Power Supply.
2, network data transmission interface switching control circuit according to claim 1; it is characterized in that; also comprise one the 2nd TVS anti-lightening protector, the described first high-frequency coupling transformer and described many with between the data input socket is set, be used to prevent thunderbolt and the civil power input overvoltage protection responded to.
3, network data transmission interface switching control circuit according to claim 1 and 2, it is characterized in that, described second low frequency signal intercepts circuit, comprises a pair of parallel resistor and electric capacity again, is separately positioned on described electricity network incoming end and described many with between the data input socket.
4, network data transmission interface switching control circuit according to claim 3 is characterized in that, described common mode choke induction circuit comprises one second high-frequency coupling transformer, and a high-frequency coupling electric capacity that is connected with the described second high-frequency coupling transformer.
5, network data transmission interface switching control circuit according to claim 4 is characterized in that, also is provided with an overcurrent protector between described electricity network incoming end and described common mode choke induction circuit.
6, according to claim 1,2,4 or 5 described network data transmission interface switching control circuit, it is characterized in that, between described electricity network incoming end and described common mode choke induction circuit, also be provided with an on-off switch.
7, network data transmission interface switching control circuit according to claim 1 is characterized in that, the described pair of transient voltage inhibition diode that the transient voltage restraining device is a pair of opposite setting.
8, according to claim 1,2,4,5 or 7 described network data transmission interface switching control circuit, it is characterized in that, described many be socket with the data input socket with at least 4 core pin.
9, network data transmission interface switching control circuit according to claim 8 is characterized in that, and is described many with data Yu socket JP1 socket, PS/2 socket, S-Video socket or VIVO socket.
10, according to Claim 8 or 9 described network data transmission interface switching control circuit, it is characterized in that, also comprise a plug that matches with described socket, described plug further connects a telephone wire coffret, a perhaps grid line coffret, perhaps a coaxial cable line coffret, perhaps a power line transmission interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201732154U CN201001115Y (en) | 2006-12-31 | 2006-12-31 | Interface switching circuit for data transmission circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201732154U CN201001115Y (en) | 2006-12-31 | 2006-12-31 | Interface switching circuit for data transmission circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201001115Y true CN201001115Y (en) | 2008-01-02 |
Family
ID=39015516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201732154U Expired - Fee Related CN201001115Y (en) | 2006-12-31 | 2006-12-31 | Interface switching circuit for data transmission circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201001115Y (en) |
-
2006
- 2006-12-31 CN CNU2006201732154U patent/CN201001115Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1883866B1 (en) | Power line communications interface and surge protector | |
| JP2934502B2 (en) | Overvoltage and overcurrent protection circuit with excellent ground balance | |
| US5689180A (en) | Isolated electrical power supply | |
| US7535685B2 (en) | Radio frequency signal coupler, coupling system and method | |
| JP4041068B2 (en) | How to protect medium voltage inductive coupling devices from electrical transients | |
| US8625246B2 (en) | DSL protection circuit | |
| CN101546909A (en) | Protective circuit, communication equipment and method for protecting device in communication equipment | |
| CN201018492Y (en) | Interface switching circuit for data transmission circuit | |
| EP2501052A1 (en) | Power line communications systems | |
| US7602596B1 (en) | Various methods and apparatuses for a surge protection scheme | |
| US8320095B2 (en) | Transformer module with multiple protections | |
| CN201001115Y (en) | Interface switching circuit for data transmission circuit | |
| CN201663438U (en) | Two-port household appliance signal surge protective device irrespective of input and output | |
| CN208971133U (en) | A kind of anti-surge circuit and pressure stabilizing device | |
| JP3717860B2 (en) | Terminator for power line carrier communication | |
| KR100471614B1 (en) | Power line communication device for signal blocking and signal transfer function | |
| CN202260439U (en) | Protection circuit for SLIC chip and PCB | |
| US6163447A (en) | Telephone equipment protection circuit | |
| CA2560429A1 (en) | Surge protection methods and apparatus | |
| CN210927454U (en) | Direct-current power supply access circuit and circuit board | |
| WO2001026343A1 (en) | Balanced spectrum limiter for telephone and communication systems and protection module incorporating the same | |
| CA2240414C (en) | Isolated electrical power supply | |
| CN115346796A (en) | Power carrier feed-through capacitor, power information encryptor and information encryption power socket | |
| KR20210009542A (en) | Emp protective device for coaxial cable | |
| CN109244720A (en) | A kind of lightning protection red and black isolated from power filtering insert row |
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: 20080102 Termination date: 20100201 |