CN201323590Y - Protective device of data channel - Google Patents
Protective device of data channel Download PDFInfo
- Publication number
- CN201323590Y CN201323590Y CNU2008201859506U CN200820185950U CN201323590Y CN 201323590 Y CN201323590 Y CN 201323590Y CN U2008201859506 U CNU2008201859506 U CN U2008201859506U CN 200820185950 U CN200820185950 U CN 200820185950U CN 201323590 Y CN201323590 Y CN 201323590Y
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- CN
- China
- Prior art keywords
- protective device
- circuit
- data channel
- series
- data
- 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.)
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Abstract
The utility model discloses a protective device of data channel, wherein a circuit of the protective device is composed of electronic elements which are connected on a printed plate, the circuit is provided with an input unit and an output unit, wherein the input unit is composed of D1, D2, D3, D4 and R1, IC1 and IC2, DI and D2 which are connected in series are connected with the D3, the D4, the IC1 and the IC2 which are connected in series mutually in parallel through the R1 and then form data input, and the input unit is composed of D5, D6, IC3 and IC4 which are connected in series mutually. When in use, a two-way clamped type protective device is installed on the side of a bottom board of a communication passage circuit board, and a corresponding connecting wire is welded. The protective device of data channel has simple structure and high density of integration, is used to protect overpressure and over-current which are caused by strong electric impact and the like, a transmission circuit is used to insulate circuit signals effectively, the main communication error rate is not affected, and the communication channel protection is effectively realized.
Description
Technical field
The utility model relates to a kind of protective device of the datel circuit of existing extensive use being implemented the data channel of overcurrent proof impact failure.
Background technology
When work such as communication equipment maintenance, trouble hunting, equipment wire jumper, under the environment such as equipment ground is bad and thunder and lightning is occurred frequently, power supply shakiness, often the interface circuit of finding data communication damages, directly cause corresponding data channel communication disruption, influenced the damage of communication interface and interlock circuit thereof.
Summary of the invention
The purpose of this utility model is: the protective device that a kind of data channel is provided; this protective device is installed on the communication port circuit board to put down overvoltage, overcurrent and cuts and discharge; and can also isolate interference up hill and dale, reach effective protection of telecommunication circuit.
Technical solution of the present utility model is: the circuit of this protective device is formed by connecting each electronic devices and components in the printed board, this circuit has the input and output unit, input unit is made up of diode D1, D2, D3, D4 and resistance R 1, single-chip microcomputer IC1, IC2, D1, the D2 of series connection is through R1 D3, the D4 of series connection mutually in parallel, and IC1, IC2 series connection back forms data input cell; The data output unit is composed in series mutually by diode D5, D6, single-chip microcomputer IC3, IC4.
In the protective device of data channel of the present utility model, between D5, D6, connect R4, C1 parallel with one another and form protected location.
In the protective device of data channel of the present utility model, series resistance R2, R3, triode BG, emitting led composition observing unit between IC2 and IC1.
In the protective device of data channel of the present utility model, some rapid wear electronic devices and components employing adds the pin mode and connects.
In the protective device of data channel of the present utility model, for multichannel communication, can be in a printed board protective circuit of integrated a plurality of passages.
During use, the protective device of two-way clamping type is installed in the base plate side of communication port circuit board, welds corresponding wiring.
The utility model is simple in structure, and the integrated level height is used for the over-voltage and over-current of initiations such as forceful electric power impact is implemented to protect and circuit signal is effectively isolated, and does not influence total communication error rate, effectively realizes the communication port protection.
Description of drawings
Fig. 1 is the protective circuit of a communication port of the present utility model.
Embodiment
As shown in Figure 1, the circuit of this protective device is formed by connecting each electronic devices and components in the printed board, this circuit has the input and output unit, input unit is made up of diode D1, D2, D3, D4 and resistance R 1, single-chip microcomputer IC1, IC2, D1, the D2 of series connection is through R1 D3, the D4 of series connection mutually in parallel, and IC1, IC2 series connection back forms data input cell; The data output unit is composed in series mutually by diode D5, D6, single-chip microcomputer IC3, IC4.
In the protective device of data channel of the present utility model, between D5, D6, connect R4, C1 parallel with one another and form protected location.
In the protective device of data channel of the present utility model, series resistance R2, R3, triode BG, emitting led composition observing unit between IC2 and IC1.
In the protective device of data channel of the present utility model, some rapid wear electronic devices and components employing adds the pin mode and connects.
In the protective device of data channel of the present utility model, for multichannel communication, can be in a printed board protective circuit of integrated a plurality of passages.
It is IN4004 that each electronic devices and components in the utility model protective circuit are selected following parameter value: D1-D6 for use, and R1, R3 are 4K1/4W, and R2 is 10K1/8W, and R4 is 300 Ω 1/4W, and IC1-IC4 is CD4001, and BG is 3DG6C.
In the circuit importation, finish the first road overvoltage, overcurrent protection by D1, D2 to upstream data, we know that normal voltage data signal changes between 0-+5V, when crosstalking into high voltage unusually, D1 will flatly cut release to it by+5V power unit, unusual D2 clamper discharge over the ground when crossing low pressure, element can be no more than signal voltage ± 0.7 state down release much larger than the electric current of 1A; Effective isolation back D3, D4 through R1 carry out the protection of second road, have isolated any possible hard pulse fully and have impacted; IC1, IC2 carry out the shaping transmission to useful signal, have reduced the influence of protective circuit to the signal transmission effectively; At the output of circuit, discharge strong electrical interference by D5, D6 and impact; The RC circuit protection digital circuit output that R4, C1 form is reason overload flow and damaging not, and C1 and the edge, front and back that is mainly used to promote data pulse cooperating of R4 effectively extend transmission distance and reduce the generation of adjudicating error code; IC3, IC4 are in order to isolation and driving action to the passage output circuit; In the circuit, all elements that is designated as A down can directly be changed for using the mode that adds pin; R3, R2, BG1, LED1 intuitively observe uploading signal; By the power supply of+12V power supply, alleviate+burden of 5V power supply, use power supply directly to take from the power supply base plate of communication port, do not need the additional power source system; The signal transmission rate that this circuit uses selects for use the parameter of element to satisfy the use standard fully less than 2400b/S; When more than using 9600b/S, transmitting, need recomputate and adjust, do not have big variation, need only change clamped and working power for the basic principle of other circuit of different transmission mechanisms to related elements such as R3, C1.
Claims (5)
1. the protective device of data channel, it is characterized in that: the circuit of this protective device is formed by connecting each electronic devices and components in the printed board, this circuit has data input and output unit, input unit is made up of diode D1, D2, D3, D4 and resistance R 1, single-chip microcomputer IC1, IC2, D1, the D2 of series connection is through R1 D3, the D4 of series connection mutually in parallel, and IC1, IC2 series connection back forms data input cell; The data output unit is composed in series mutually by diode D5, D6, single-chip microcomputer IC3, IC4.
2. the protective device of data channel according to claim 1 is characterized in that: connect resistance R 4 parallel with one another, capacitor C 1 composition protected location between diode D5, D6.
3. the protective device of data channel according to claim 1 is characterized in that: series resistance R2, three-phase pipe BG, emitting led and R3 composition observing unit between IC2 and IC1.
4. the protective device of data channel according to claim 1 is characterized in that: the rapid wear electronic devices and components adopt and add the pin mode and connect.
5. the protective device of data channel according to claim 1 is characterized in that: for multichannel communication, can be in a printed board protective circuit of integrated a plurality of passages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201859506U CN201323590Y (en) | 2008-09-11 | 2008-09-11 | Protective device of data channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201859506U CN201323590Y (en) | 2008-09-11 | 2008-09-11 | Protective device of data channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201323590Y true CN201323590Y (en) | 2009-10-07 |
Family
ID=41160961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201859506U Expired - Fee Related CN201323590Y (en) | 2008-09-11 | 2008-09-11 | Protective device of data channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201323590Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279057A (en) * | 2013-04-28 | 2013-09-04 | 许昌许继晶锐科技有限公司 | Analog acquisition channel protection circuit and analog acquisition system |
-
2008
- 2008-09-11 CN CNU2008201859506U patent/CN201323590Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279057A (en) * | 2013-04-28 | 2013-09-04 | 许昌许继晶锐科技有限公司 | Analog acquisition channel protection circuit and analog acquisition system |
| CN103279057B (en) * | 2013-04-28 | 2018-09-07 | 许昌许继晶锐科技有限公司 | Analog acquisition passage protects circuit and analog collection 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: 20091007 Termination date: 20100911 |