CN201413988Y - Lightning-proof device, lighting-proof adapter, lighting-proof cable and electric equipment with lighting-proof cable - Google Patents
Lightning-proof device, lighting-proof adapter, lighting-proof cable and electric equipment with lighting-proof cable Download PDFInfo
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- CN201413988Y CN201413988Y CN2009201547142U CN200920154714U CN201413988Y CN 201413988 Y CN201413988 Y CN 201413988Y CN 2009201547142 U CN2009201547142 U CN 2009201547142U CN 200920154714 U CN200920154714 U CN 200920154714U CN 201413988 Y CN201413988 Y CN 201413988Y
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Abstract
A lightning-proof device is used for a synchronous serial interface and connected with a pair of TVS diodes which are used for voltage clamp positions in positive and negative directions of a signal wire on the signal wire of the synchronous serial interface. The utility model also discloses a lighting-proof adapter, a lighting-proof cable and electric equipment with the lighting-proof cable. Thelightning-proof device has commonality, can effectively resist surging and realize higher port density.
Description
Technical field
The utility model relates to a kind of electronic product, especially with a kind of lightning protection device, have this lightning protection device the lightning protection adapter, have the lightning protected cable of this lightning protection adapter and have an electronic equipment of this lightning protected cable relevant.
Background technology
In the prior art, serial ports is that communication field uses interface very widely, can realize between two equipment that easily communication connects.But serial ports does not generally have interface circuits such as line transformer, the epd of terminal device is required relatively stricter, all poor to the common mode on the circuit, differential mode protective capacities, in use occur physical property easily and lost efficacy.
Lightning Protection is significant for synchronous serial interface.Synchronous serial interface is the frequent a kind of interfaces that use of communication equipment such as router, and comparison distinct issues are exactly lightning Protection in actual use.The Lightning Over-voltage damage equipment can be divided into two kinds of situations, and a kind of is attacked directly by thunder and lightning to cause damaging, and another kind is responded to thunder to be influenced and cause damaging.According to statistics, electronic equipment is attacked directly by thunder and lightning and to damage shared ratio less, and most the damage to the induction thunder causes, and promptly the circuitry lines of the capable ripple of thunder and lightning by transmission information reaches electronic equipment and make some electronic component of electronic equipment impaired.For example: when router serial ports opposite equip. is Modem by the up situation that goes out the family of phone port, or opposite equip. is to be placed under the applicable cases of outdoor ATM self-help drawing money machine, thunderbolt acts on the up phone port of Modem, because Modem does not generally have ground connection, so energy can't directly be released to the earth by Modem, and router is a ground connection, so energy can be released via router by serial interface cable, the serial ports of router has served as the path of releasing of thunderbolt energy, generally there are several meters even longer owing to connect the serial interface cable of two equipment, holding wire line footpath is thinner, resistance is bigger, so the heavy current that thunderbolt moment produces can cause increase to tens volts two voltage difference moments between the equipment, is easy to cause the physical property of serial port circuit to lose efficacy, and will cause the damage of router device when serious.
But, because the present situation of multi-protocols makes the synchronous serial interface lightning protection bring technical difficulty.Synchronous serial interface has various protocols, for example V35, V24, X21 or the like.Router device generally all is that an interface is supported various protocols simultaneously, need select corresponding cable for use when therefore using different agreement, as shown in Figure 1, with the V35 cable is example, this root cable interface 13 one ends and communication equipment is connected with router, and an other end is exactly the standard interface 2 of this V35 agreement correspondence.The main distinction of different agreement is: signal transfer mode is different with the level amplitude, and some is a single-ended signal, and some is a differential transfer; The signal amplitude difference makes transmission range also different, and some can only tens meters, and some can reach km; The flank speed difference of supporting, some flank speed is 2M, some can only arrive 64K.The mechanical property of the defined interface of different agreement is also inequality.
The lightning protection device of prior art generally will lack versatility respectively at different agreements, also brings inconvenience to design.The protection design of the synchronous serial interface communication apparatus of prior art generally is to place protective device on equipment veneer, and cable only plays the effect of mechanical connection, does not possess protective capacities.Another is exactly that the lightning protection device that occurs on the market (has DB9, DB25, standard interfaces such as DB34), it is the protection module in the cable of being serially connected at different serial port protocols designs, need use the lightning protection device of various criterion interface for different agreements, bring very big inconvenience to practical application like this.Along with the develop rapidly of electronics and information industry, have higher requirement for PCB design area and port density.Synchronous serial interface generally has many single data and control line, nearly 16 of the synchronous serial interfaces of V35 agreement for example, its holding wire, and each signal all needs to connect protective device; Because the thunderbolt instantaneous energy is very big, protective device needs very strong conveyance capacity, device volume is bigger, and this just makes on equipment veneer the solution of placing protective device will occupy the very big area of PCB, and system design has been increased design difficulty and limited the port density of equipment.In addition, whether serial equipment is easy to suffer thunderbolt damage and environment for use, opposite equip. type of relationship very big, not all serial ports all needs protection, in the prior art protection circuit is made in solution on the equipment, each serial ports all increases protection, and cost is higher relatively.For the more weak serial equipment of some protective capacities that has existed on the market, can improve degree of protection by increasing lightning protection device.But lightning protection device need be equipped with different lightning protection devices according to different DB interface types at different serial port protocol Interface design, therefore lack versatility, and price is higher.
Protective action is near the equipment side best results in addition, and lightning protection device can only be serially connected in the network side of router standard serial port, and its protective capacities can be under some influence.
The utility model content
At problems of the prior art, the purpose of this utility model is to provide a kind of lightning protection device, resisting surge impact, and reduces cost, and reduces the area of protection circuit.
Second purpose of the present utility model is to provide a kind of lightning protection adapter with the utility model lightning protection device, easily cable of the prior art transformed, and improves lightning protection capability.
The 3rd purpose of the present utility model is to provide a kind of lightning protected cable with the utility model lightning protection device, to realize higher port density, improves versatility.
The 4th purpose of the present utility model is to provide a kind of electronic equipment with the utility model lightning protected cable.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of lightning protection device is used for the synchronous serial interface lightning protection, is connected with a pair of TVS pipe that is used for the positive negative direction voltage clamp of described holding wire on the holding wire of described synchronous serial interface.
Lightning protection device of the present utility model, preferred, on each holding wire over the ground and connect described a pair of TVS pipe.
Lightning protection device of the present utility model, preferably, the shared described a pair of TVS pipe of a plurality of holding wires, described a pair of TVS pipe comprises TVS pipe that is used for the negative voltage clamper and the 2nd TVS pipe that is used for the forward voltage clamper, between described TVS pipe and each described holding wire, be connected first switching diode respectively, between described the 2nd TVS pipe and each described holding wire, be connected the second switch diode respectively, the described first switching diode negative electrode connects described holding wire, anode connects described TVS pipe, described second switch diode anode connects described holding wire, and negative electrode connects described the 2nd TVS pipe.
Lightning protection device of the present utility model, preferred, be connected with a pair of switching diode that prevents to disturb between the holding wire of being used between per two holding wires.
A kind of lightning protection adapter is used for the lightning protection of synchronous serial interface cable, is provided with lightning protection device of the present utility model in the described lightning protection adapter.
Lightning protection adapter of the present utility model, preferred, described lightning protection adapter internal mold injection moulding and external mold injection moulding, described internal mold injection moulding wraps up the lightning protection circuit of described lightning protection device, and described adventitia injection moulding connects as one described lightning protection device and cable.
Lightning protected cable of the present utility model has lightning protection device of the present utility model.
Lightning protected cable of the present utility model, preferably, described lightning protected cable comprises the lightning protection adapter that is provided with lightning protection device, the described lightning protection first end of transferring connects first cable body, one end connects second cable body, the described first cable body end is provided with the interface that connects communication equipment, and the other end is provided with standard interface.
Electronic equipment of the present utility model has lightning protected cable of the present utility model.
Electronic equipment of the present utility model, preferred, the lightning protection device of described lightning protected cable is arranged in the lightning protection adapter, and described lightning protection adapter is arranged near in the serial ports cable of equipment side.
As shown from the above technical solution, the utlity model has following beneficial effect: lightning protection device of the present utility model, by voltage clamp, make too high voltage can not occur on the serial ports to the positive negative direction of holding wire, reach the purpose of protection communication apparatus.And the many shared TVS pipes of holding wire have reduced cost, have also reduced the area of protection circuit.Lightning protection adapter of the present utility model and lightning protected cable, by universal (between the different agreement general) the synchronous serial interface lightning protection adapter that has protection circuit is serially connected near in the serial ports cable of equipment side, both reduce the PCB area that the unit port takies equipment effectively, improved the density of port; Simultaneously, for protective capacities more weak electronic equipment or communication equipment, can can obtain higher lightning protection grade by the mode of this lightning protection adapter of direct increase, need not equipment carried out other the transformation of the way or replacing, reduce the manufacturing or the maintenance cost of communication system.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is a cable schematic diagram of the prior art.
Fig. 2 is the lightning protection circuit schematic diagram of the lightning protection device of the utility model first embodiment.
Fig. 3 is the lightning protection circuit schematic diagram of the lightning protection device of the utility model second embodiment.
Fig. 4 is the schematic diagram of the lightning protected cable of the utility model embodiment.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
The lightning protection device of the utility model first embodiment; (or claim transient voltage to suppress diode by switching diode and transient voltage suppressor; Transient Voltage Suppressors; be called for short the TVS pipe) constitute; by clamper (or claiming clamped) to the positive negative direction of holding wire; make too high voltage can not occur on the serial ports, reach the purpose of protection communication apparatus.The major advantage of the lightning protection device of the utility model first embodiment is: the many shared TVS pipes of holding wire, reduced cost, and also reduced the area of protection circuit.Concrete lightning protection circuit form as shown in Figure 2, Q1/Q2 is shared high-power TVS pipe, Q1 is used for the negative voltage clamper, Q2 is used for the forward voltage clamper, between Q1 and each described holding wire, be connected switching diode D2, D4, D6, D8 respectively, between Q2 and each described holding wire, be connected switching diode D1, D3, D5, D7 respectively.During operate as normal, owing between per two holding wires a pair of described switching diode is arranged all, the diode forward conducting oppositely ends, so all do not have the phase mutual interference between any two holding wires; And when equipment meets with surge impact, be example with signal A, when surge impact voltage just was and is higher than the puncture voltage of Q2, D1, Q2 opened, and the voltage on the signal A is by clamper; When surge impact voltage was negative and is lower than the puncture voltage of Q1, D2, Q1 opened, and the voltage on the signal A is by clamper.After surge impact finished, Q1/Q2 returned to cut-off state again, and this lightning protection circuit can continue operate as normal.
Similar above-mentioned operation principle, the lightning protection device of the utility model second embodiment, the mode that adopts on the every holding wire all over the ground and connect two TVS pipes is protected, concrete lightning protection circuit form as shown in Figure 3, reliability increases, just need the TVS quantity of use more, the area that takies is big.
The lightning protection adapter of the utility model embodiment is used for the lightning protection of synchronous serial interface cable, is provided with the lightning protection device of the utility model embodiment in the described lightning protection adapter.
The utility model discloses a kind of guard technology scheme of communication apparatus synchronous serial interface, its principal character just is, increase a lightning protection adapter at serial interface cable near equipment side, its two ends are and the corresponding DB interface of device port (as DB28, DB25 etc.) that middle protection circuit is realized the lightning Protection Design to each holding wire.This adapter is serially connected in the serial interface cable, does not take the PCB space of equipment, helps improving the port density of equipment; Simultaneously, for realizing lightning protection transformation by increasing this adapter simply at the equipment of network operation, original cable can continue to use, and had also removed from according to the different agreement interface being equipped with consideration on the loaded down with trivial details and cost of different lightning protection devices.
With the DB28 interface is example, and the signal definition of DB28 interface is as shown in table 1.The processing technology step of the lightning protection adapter of the utility model embodiment is as follows: 1, for the DB28 interface cable, the holding wire of needs protection is welded on the corresponding signal pad of protection circuit, the ground of ground wire and protection circuit (GND) welds together; 2, internal mold injection moulding, temperature should be lower than the scolding tin fusing point; Protection circuit is wrapped up; 3, with Copper Foil screen 360 degree of W1, W2 are well overlapped, guarantee its shield effectiveness; 4, external mold injection moulding connects as one protection circuit and cable.
Table 1
| The pin title | The number of pins of connector | Direction |
| TXD_A | 1 | I |
| TXD_B | 2 | I |
| TXCE_A | 15 | I |
| TXCE_B | 16 | I |
| TXC_A | 3 | I/O |
| TXC_B | 4 | I/ |
| NC | ||
| 5 | / | |
| GND | 6 | / |
| RXC_A | 17 | O |
| RXC_B | 18 | O |
| RXD_A | 19 | O |
| RXD_B | 20 | O |
| RTS_A | 13 | I |
| RTS_B | 14 | I |
| DTR_A | 27 | I |
| DTR_B | 28 | I |
| DCD_A | 11 | I/O |
| DCD_B | 12 | I/O |
| DSR_A | 25 | O |
| DSR_B | 26 | O |
| MODE0 | 7 | I |
| MODE1 | 8 | I |
| MODE2 | 9 | I |
| MODE_DCE | 10 | I |
| GND | 21 | / |
| LL | 22 | I/O |
| CTS_A | 23 | O |
| CTS_B | 24 | O |
Lightning protected cable of the present utility model has lightning protection device of the present utility model.As shown in Figure 4, the lightning protected cable of the utility model preferred embodiment, described lightning protected cable comprises the lightning protection adapter 4 that is built-in with lightning protection device 5, lightning protection adapter 4 one ends connect first cable body 31, one end connects second cable body 32, first cable body, 31 ends are provided with the interface 1 that connects communication equipment, and the other end is provided with standard interface 2.
Electronic equipment of the present utility model has lightning protected cable of the present utility model.This electronic equipment includes but not limited to the electronic equipment that router, switch etc. are used to communicate by letter.The electronic equipment of the utility model embodiment, in order to obtain better lightning protection effect, the lightning protection device of described lightning protected cable is arranged in the lightning protection adapter, and described lightning protection adapter is arranged near in the serial ports cable of equipment side.
The utility model will provide a kind of solution synchronous serial interface to resist the technical scheme of surge impact (thunderbolt etc.), can realize higher port density, reach the purpose that as far as possible takies the area of equipment PCB less, and on the market at the product of network operation, can use this programme easily and carry out transformation and upgrade raising protective capacities, and the consensus standard interface that the compatible network side is different has versatility.
Above-described only is preferable possible embodiments of the present utility model; described embodiment is not in order to limit scope of patent protection of the present utility model; therefore the equivalent structure done of every utilization specification of the present utility model and accompanying drawing content changes, and in like manner all should be included in the protection range of the present utility model.
Claims (10)
1. a lightning protection device is used for synchronous serial interface, it is characterized in that, is connected with a pair of TVS pipe that is used for the positive negative direction voltage clamp of described holding wire on the holding wire of described synchronous serial interface.
2. lightning protection device as claimed in claim 1 is characterized in that, on each holding wire over the ground and connect described a pair of TVS pipe.
3. lightning protection device as claimed in claim 1, it is characterized in that, the shared described a pair of TVS pipe of a plurality of holding wires, described a pair of TVS pipe comprises TVS pipe that is used for the negative voltage clamper and the 2nd TVS pipe that is used for the forward voltage clamper, between described TVS pipe and each described holding wire, be connected first switching diode respectively, between described the 2nd TVS pipe and each described holding wire, be connected the second switch diode respectively, the described first switching diode negative electrode connects described holding wire, anode connects described TVS pipe, described second switch diode anode connects described holding wire, and negative electrode connects described the 2nd TVS pipe.
4. lightning protection device as claimed in claim 3 is characterized in that, is connected with a pair of switching diode that prevents to disturb between the holding wire of being used between per two holding wires.
5. a lightning protection adapter is used for the lightning protection of synchronous serial interface cable, it is characterized in that, is provided with the arbitrary described lightning protection device of claim 1-4 in the described lightning protection adapter.
6. lightning protection adapter as claimed in claim 5, it is characterized in that: described lightning protection adapter internal mold injection moulding and external mold injection moulding, described internal mold injection moulding wraps up the lightning protection circuit of described lightning protection device, and described adventitia injection moulding connects as one described lightning protection device and cable.
7. lightning protected cable, it is characterized in that: described lightning protected cable has the arbitrary described lightning protection device of claim 1-4.
8. lightning protected cable as claimed in claim 7, it is characterized in that: described lightning protected cable comprises the lightning protection adapter that is provided with lightning protection device, the described lightning protection first end of transferring connects first cable body, one end connects second cable body, the described first cable body end is provided with the interface that connects communication equipment, and the other end is provided with standard interface.
9. an electronic equipment is characterized in that: have lightning protected cable as claimed in claim 7.
10. electronic equipment as claimed in claim 9 is characterized in that: the lightning protection device of described lightning protected cable is arranged in the lightning protection adapter, and described lightning protection adapter is arranged near in the serial ports cable of equipment side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201547142U CN201413988Y (en) | 2009-05-20 | 2009-05-20 | Lightning-proof device, lighting-proof adapter, lighting-proof cable and electric equipment with lighting-proof cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201547142U CN201413988Y (en) | 2009-05-20 | 2009-05-20 | Lightning-proof device, lighting-proof adapter, lighting-proof cable and electric equipment with lighting-proof cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201413988Y true CN201413988Y (en) | 2010-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201547142U Expired - Lifetime CN201413988Y (en) | 2009-05-20 | 2009-05-20 | Lightning-proof device, lighting-proof adapter, lighting-proof cable and electric equipment with lighting-proof cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201413988Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842105A (en) * | 2017-11-27 | 2019-06-04 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of shared protection circuit of Avionics Interface transient state inhibition |
| CN109950755A (en) * | 2017-12-21 | 2019-06-28 | 中航光电科技股份有限公司 | Lightning protection connector, the connector modules of lightning protection connector and lightning protection printed board |
| CN114097157A (en) * | 2019-05-13 | 2022-02-25 | 默森美国电力股份有限公司 | Surge protection device for protecting multiple DC or AC power lines |
-
2009
- 2009-05-20 CN CN2009201547142U patent/CN201413988Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842105A (en) * | 2017-11-27 | 2019-06-04 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of shared protection circuit of Avionics Interface transient state inhibition |
| CN109950755A (en) * | 2017-12-21 | 2019-06-28 | 中航光电科技股份有限公司 | Lightning protection connector, the connector modules of lightning protection connector and lightning protection printed board |
| CN114097157A (en) * | 2019-05-13 | 2022-02-25 | 默森美国电力股份有限公司 | Surge protection device for protecting multiple DC or AC power lines |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: Xinhua three Technology Co., Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: Huasan Communication Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100224 |