CN102969706B - The system and method for a kind of POE Power over Ethernet lightning protection - Google Patents

The system and method for a kind of POE Power over Ethernet lightning protection Download PDF

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Publication number
CN102969706B
CN102969706B CN201210482876.5A CN201210482876A CN102969706B CN 102969706 B CN102969706 B CN 102969706B CN 201210482876 A CN201210482876 A CN 201210482876A CN 102969706 B CN102969706 B CN 102969706B
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lightning protection
poe
over ethernet
power over
protection circuit
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CN102969706A (en
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刘沁峰
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Shanghai Feixun Data Communication Technology Co Ltd
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Shanghai Feixun Data Communication Technology Co Ltd
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Abstract

The present invention relates to technical field of electronic equipment, particularly relate to the system and method for a kind of POE Power over Ethernet lightning protection, the thunder and lightning signal hit in Power over Ethernet system is discharged into large ground by GDT by the one-level lightning protection circuit module that the present invention is arranged, the GDT residual voltage that remaining lightning strike signals is formed then can be coupled on the virtual port of RJ45 interface and the power module of load equipment, residual voltage on virtual port is by transient voltage suppressor diode ground connection, and residual voltage can be discharged by common diode ground connection by the power module of load equipment, and then when can effectively avoid meeting with thunderbolt, thunder and lightning signal is on the impact of the local side apparatus be applied in POE Power over Ethernet system and terminal equipment, with the safety of the local side apparatus protecting POE Power over Ethernet system and be applied in POE Power over Ethernet system and terminal equipment, and circuit is simple, process costs is low, easy to utilize.

Description

The system and method for a kind of POE Power over Ethernet lightning protection
Technical field
The present invention relates to technical field of electronic equipment, particularly relate to the system and method for a kind of POE Power over Ethernet lightning protection.
Background technology
POE(Power Over Ethernet) refer to when existing Ethernet Cat.5 wiring architecture does not make any changes, for the equipment of some IP-based terminals is if IP telephone machine, wireless local network connecting point AP, POE network printer or web camera etc. are while transmission of data signals, for it provides direct current supply.
POE is also referred to as electric power system (the Power over LAN based on local area network (LAN), be called for short POL), active Ethernet (Active Ethernet) or Power over Ethernet etc., be the newest standards specification transmitting data and electrical power while of utilizing existing standard Ethernet transmission cable, and maintain the compatibility with existing Ethernet system and user.
Fig. 1 is the structural representation of existing POE system in background technology of the present invention; As shown in Figure 1, existing POE system mainly comprises power supply provides equipment (Power Sourcing Equipment is called for short PSE) and application of power equipment (Powered Device) two parts; Wherein, PSE device is for ethernet client equipment is powered, also be the manager of whole POE Ethernet system power supply process simultaneously, and PD equipment is the PSE load accepting power supply, namely PD is the client device of POE system, as IP phone, network security video camera, AP, palmtop PC (PDA) or charger for mobile phone etc.
Because ethernet device and RJ45 set up informational linkage about aspects such as the connection of receiving end equipment PD, device type and power consumption level based on IEEE 802.3AF standard (power maximum support 13W) or IEEE 802.3AT standard (power maximum support 30W), and the PSE that takes this as a foundation is powered to PD by Ethernet; So, based on the ethernet device of IEEE 802.3AF standard when its power is no more than 13W, or based on the ethernet device of IEEE 802.3AT standard when its power is no more than 30W, generally all can obtain corresponding electric power from RJ45 socket.
So along with present POE power over Ethernet is also more and more ripe, POE Power over Ethernet is widely used; But, owing to there is no perfect lightning-protecting engineering in current POE Power over Ethernet system, when meeting with thunderbolt weather, be applied to local side apparatus in POE Power over Ethernet system and terminal equipment also exists the hidden danger of being damaged by being struck by lightning.
Summary of the invention
For the problems referred to above existed in existing POE Power over Ethernet system; when now providing one can effectively avoid meeting with thunderbolt; thunder and lightning signal on the impact of the local side apparatus be applied in POE Power over Ethernet system and terminal equipment, with the safety of the local side apparatus protecting POE Power over Ethernet system and be applied in POE Power over Ethernet system and terminal equipment.
The object of the invention is to be achieved through the following technical solutions:
The invention provides the system of a kind of POE Power over Ethernet lightning protection, on the power-supply device being applied to the electric power system of the POE Ethernet being provided with RJ45 interface and the load equipment of client be connected with the electric power system of this POE Ethernet, wherein, one-level lightning protection circuit module and secondary lightning protection circuit module is comprised;
The both positive and negative polarity of described power-supply device is by described one-level lightning protection circuit module ground, and described load equipment is by described secondary lightning protection circuit module ground, and described secondary lightning protection circuit module is connected with the virtual port output of described RJ45 interface;
Wherein, gas discharge tube (Gas DischargeTube is provided with in described one-level lightning protection circuit module, be called for short GDT), be provided with transient voltage suppressor diode (Transient Voltage Suppressors is called for short TVS) and general-purpose diode in described secondary lightning protection circuit module.
The system of above-mentioned POE Power over Ethernet lightning protection, wherein, described power-supply device comprises POE network transformer, and described RJ45 interface is by the centre cap in POE network transformer and described one-level lightning protection circuit model calling.
The system of above-mentioned POE Power over Ethernet lightning protection, wherein, described RJ45 interface port of powering is connected with described centre cap.
The system of above-mentioned POE Power over Ethernet lightning protection, wherein, 1,2 ports of described RJ45 interface are connected with described centre tapped positive pole, and 3,6 ports of described RJ45 interface are connected with described centre tapped negative pole.
The system of above-mentioned POE Power over Ethernet lightning protection, wherein, 1,2 ports of described RJ45 interface are by a gas discharge tube ground connection, and 3,6 ports of described RJ45 interface are by another gas discharge tube ground connection.
The system of above-mentioned POE Power over Ethernet lightning protection, wherein, described load equipment is connected with a power module, and described power module is by transient voltage suppressor diode ground connection.
The system of above-mentioned POE Power over Ethernet lightning protection, wherein, described load equipment is by diode ground connection.
The system of above-mentioned POE Power over Ethernet lightning protection, wherein, the model of diode is SIG-7.
The invention also discloses the method for a kind of POE Power over Ethernet lightning protection, be applied to the system of POE Power over Ethernet described above lightning protection, described load equipment is connected with power module, wherein, comprise the following steps:
When being struck by lightning on the electric power system of described POE Ethernet, lightning strike signals is coupled to described RJ45 interface, and by the gas discharge tube in described one-level lightning protection circuit module, part lightning strike signals is discharged into large ground;
Remaining lightning strike signals forms the residual voltage of gas discharge tube, and on the virtual port being coupled to described RJ45 interface and described power module, described power module is by described transient voltage suppressor diode ground connection, and described virtual port is by described general-purpose diode ground connection.
In sum, the system and method for a kind of POE Power over Ethernet of the present invention lightning protection, by GDT, the thunder and lightning signal hit in Power over Ethernet system is discharged into large ground by the one-level lightning protection circuit module arranged, the GDT residual voltage that remaining lightning strike signals is formed then can be coupled on the virtual port of RJ45 interface and the power module of load equipment, residual voltage on virtual port is by transient voltage suppressor diode ground connection, and residual voltage can be discharged by common diode ground connection by the power module of load equipment, and then when can effectively avoid meeting with thunderbolt, thunder and lightning signal is on the impact of the local side apparatus be applied in POE Power over Ethernet system and terminal equipment, with the safety of the local side apparatus protecting POE Power over Ethernet system and be applied in POE Power over Ethernet system and terminal equipment, and circuit is simple, process costs is low, easy to utilize.
Accompanying drawing explanation
Fig. 1 is the structural representation of the existing POE system of the present invention;
Fig. 2 is the electrical block diagram of one-level lightning protection circuit module in the embodiment of the present invention;
Fig. 3 is the structural representation of load equipment lightning protection circuit in secondary lightning protection circuit module in the embodiment of the present invention;
Fig. 4 is the structural representation of the lightning protection circuit of the power module of load equipment in secondary lightning protection circuit module in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described:
Fig. 2 is the electrical block diagram of one-level lightning protection circuit module in the embodiment of the present invention, Fig. 3 is the structural representation of load equipment lightning protection circuit in secondary lightning protection circuit module in the embodiment of the present invention, and Fig. 4 is the structural representation of the lightning protection circuit of the power module of load equipment in secondary lightning protection circuit module in the embodiment of the present invention.
The system of a kind of POE Power over Ethernet lightning protection, on the power-supply device being mainly used in the electric power system of the POE Ethernet being provided with RJ45 interface and the load equipment of client be connected with the electric power system of this POE Ethernet, comprise and be provided with gas discharge tube (Gas Discharge Tube, be called for short GDT) one-level lightning protection circuit module, and be provided with the secondary lightning protection circuit module of transient voltage suppressor diode (Transient Voltage Suppressors is called for short TVS) and general-purpose diode; Wherein, the both positive and negative polarity of power-supply device is by one-level lightning protection circuit module ground, and load equipment is by secondary lightning protection circuit module ground, and secondary lightning protection circuit module is connected with the virtual port output of RJ45 interface.
As shown in Figure 2, after 1,2 ports of RJ45 interface are connected with the centre cap positive pole RT7 of the POE network transformer in power-supply device, by gas discharge tube (Gas Discharge Tube, be called for short GDT) TVS15 ground connection, and one end that the centre cap positive pole RT7 of POE network transformer is connected with described TVS15, also successively by resistance R266 and the electric capacity C561 ground connection of series connection; After 3,6 ports of RJ45 interface are connected with the centre tapped negative pole NEG7 of the POE network transformer in power-supply device, by gas discharge tube (Gas Discharge Tube, be called for short GDT) TVS16 ground connection, and one end that the centre cap negative pole NEG7 of POE network transformer is connected with described TVS16, also successively by resistance R26 and the electric capacity C300 ground connection of series connection; Wherein, the resistance of resistance R266, R277 is 75 Ω, and electric capacity C300, C561 are 1000PF/3KV, and TVS15, TVS16 model is BC201N; When the pin of 1,2,3 and 6 of lightning strike signals coupling RJ45 port, by centre tapped positive pole RT7 and the negative pole NEG7 of network transformer, respectively through TVS15 and TVS16, lightning strike signals is discharged into the earth, to reach lightning-arrest effect, thus the damage of the local side apparatus of protection application in POE Power over Ethernet system; Wherein, on the centre cap that 48v+/-power supply connects at 1,2,3,6 pins being added to RJ45 port, make 1 of RJ45 port, 2,3,6 pins transmit data and power supply simultaneously.
In addition, when 4,5,7 and 8 pins according to RJ45 port are powered, then on the pin of 4,5,7 and 8 of this RJ45 port, carry out lightning protection, when adopting all pins of RJ45 port to power, then all pin all will carry out lightning protection setting, comprises the pin powering simultaneously and transmit data.
As shown in Figure 3, load equipment link GATE0(PD_FET_GATE0) being the triode Q2 of FDT361 with model, grid is connected, the source class S end of this triode Q2 measures earth terminal G by resistance R33 with load equipment and is connected, the negative pole end that the drain D end of this triode Q2 is the diode D30 of S1G-7 by fuse F and model is connected, and the positive terminal of this diode D30 measures earth terminal G(PD_SENSE_NEG with load equipment) be connected; One end that the negative pole end of above-mentioned diode D30 is also the positive terminal of the diode D1 of SS110 respectively with model, resistance is the resistance R3 of 46.4k Ω and model are that one end of the fuse F1 of 3216FF-1A is connected, the negative pole end of diode D1 is all connected with power module DC48V with the other end of resistance R3, and the other end of fuse F1 is connected with power module DC48V by parallel electric capacity C2, C3, and one end of being connected with electric capacity C3 of this fuse F1 also with the virtual port output T1(VPORT_NEG_OUT of RJ45 interface) be connected; Wherein, the model of electric capacity C2 and C3 in parallel is 100Nf/.x7r/100V.
As shown in Figure 4, power module DC48V is also the TVS diode D37 ground connection of SMCJ58A by model, and the positive terminal ground connection of this diode D37.
Due to the discharging action through GTD discharge tube TVS15 and TVS16; major part lightning strike signals is released to large ground; but the lightning strike signals of remnants can be coupled to T1 and DC48V end; the lightning strike signals being coupled to T1 end is discharged into G end through D30; lightning strike signals on DC48V end then can discharge through D37; so just the lightning strike signals of remnants can be discharged, to reach lightning-arrest effect, thus the damage of the load equipment of protection application in POE Power over Ethernet system.
As in Figure 2-4, the method for a kind of POE Power over Ethernet lightning protection, is applied to the system of above-mentioned POE Power over Ethernet lightning protection, load equipment is connected with power module DC48V, wherein, comprises the following steps:
First, when being struck by lightning on the electric power system of POE Ethernet, lightning strike signals is coupled to RJ45 interface, through the centre cap of POE network transformer, and by gas discharge tube TVS15 and TVS16 in one-level lightning protection circuit module, the lightning strike signals of the overwhelming majority is discharged into large ground.
Secondly, on the virtual port T1 that remaining lightning strike signals is coupled to RJ45 interface and power module link DC48V, the link DC48V of power module is by transient voltage suppressor diode D37 ground connection, and virtual port T1 is by diode D30 ground connection.
Because lightning strike signals is discharged into large ground through one-level lightning protection circuit module and secondary lightning protection circuit module, thus when making POE Power over Ethernet system meet with thunderbolt, lightning strike signals all can be imported the earth, thus the middle local side apparatus effectively avoiding being connected in POE Power over Ethernet system and terminal equipment damage because of thunderbolt, to ensure the safe operation of the equipment of user and Virtual network operator when thunderstorm weather.
In sum, the system and method for a kind of POE Power over Ethernet of the present invention lightning protection, by GDT, the thunder and lightning signal hit in Power over Ethernet system is discharged into large ground by the one-level lightning protection circuit module arranged, the GDT residual voltage that remaining lightning strike signals is formed then can be coupled on the virtual port of RJ45 interface and the power module of load equipment, residual voltage on virtual port is by transient voltage suppressor diode ground connection, and residual voltage can be discharged by common diode ground connection by the power module of load equipment, and then when can effectively avoid meeting with thunderbolt, thunder and lightning signal is on the impact of the local side apparatus be applied in POE Power over Ethernet system and terminal equipment, with the safety of the local side apparatus protecting POE Power over Ethernet system and be applied in POE Power over Ethernet system and terminal equipment, and circuit is simple, process costs is low, easy to utilize.
By illustrating and accompanying drawing, giving the exemplary embodiments of the ad hoc structure of embodiment, based on the present invention's spirit, also can do other conversion.Although foregoing invention proposes existing preferred embodiment, but these contents are not as limitation.
For a person skilled in the art, after reading above-mentioned explanation, various changes and modifications undoubtedly will be apparent.Therefore, appending claims should regard the whole change and correction of containing true intention of the present invention and scope as.In Claims scope, the scope of any and all equivalences and content, all should think and still belong to the intent and scope of the invention.

Claims (9)

1. the system of POE Power over Ethernet lightning protection, on the power-supply device being applied to the electric power system of the POE Ethernet being provided with RJ45 interface and the load equipment of client be connected with the electric power system of this POE Ethernet, it is characterized in that, comprise one-level lightning protection circuit module and secondary lightning protection circuit module;
The both positive and negative polarity of described power-supply device is by described one-level lightning protection circuit module ground, and described load equipment is by described secondary lightning protection circuit module ground, and described secondary lightning protection circuit module is connected with the virtual port output of described RJ45 interface;
Wherein, gas discharge tube is provided with in described one-level lightning protection circuit module, be provided with transient voltage suppressor diode and general-purpose diode in described secondary lightning protection circuit module, and the residual voltage formed after described gas discharge tube discharge is through described transient voltage suppressor diode and general-purpose diode release; Described RJ45 interface transmits data and power supply with the pin of described one-level lightning protection circuit module and described secondary lightning protection circuit model calling respectively simultaneously.
2. the system of POE Power over Ethernet according to claim 1 lightning protection, is characterized in that, described power-supply device comprises POE network transformer, and described RJ45 interface is by the centre cap in POE network transformer and described one-level lightning protection circuit model calling.
3. the system of POE Power over Ethernet according to claim 2 lightning protection, is characterized in that, 1,2 ports of described RJ45 interface are connected with described centre tapped positive pole, and 3,6 ports of described RJ45 interface are connected with described centre tapped negative pole.
4. the system of POE Power over Ethernet according to claim 3 lightning protection, is characterized in that, 1,2 ports of described RJ45 interface are by a gas discharge tube ground connection, and 3,6 ports of described RJ45 interface are by another gas discharge tube ground connection.
5. the system of POE Power over Ethernet according to claim 2 lightning protection, is characterized in that, described RJ45 interface port of powering is connected with described centre cap.
6. the system of POE Power over Ethernet according to claim 1 lightning protection, is characterized in that, described load equipment is connected with a power module, and described power module is by transient voltage suppressor diode ground connection.
7. the system of POE Power over Ethernet according to claim 1 lightning protection, is characterized in that, described load equipment is by diode ground connection.
8. the system of POE Power over Ethernet according to claim 7 lightning protection, is characterized in that, the model of diode is SIG-7.
9. a method for POE Power over Ethernet lightning protection, is applied to the system as the POE Power over Ethernet lightning protection in claim 1-8 as described in any one, described load equipment is connected with power module, it is characterized in that, comprise the following steps:
When being struck by lightning on the electric power system of described POE Ethernet, lightning strike signals is coupled to described RJ45 interface, and by the gas discharge tube in described one-level lightning protection circuit module, part lightning strike signals is discharged into large ground;
Remaining lightning strike signals forms the residual voltage of gas discharge tube, and on the virtual port being coupled to described RJ45 interface and described power module, described power module is by described transient voltage suppressor diode ground connection, and described virtual port is by described general-purpose diode ground connection;
Wherein, described RJ45 interface transmits data and power supply with the pin of described one-level lightning protection circuit module and described secondary lightning protection circuit model calling respectively simultaneously.
CN201210482876.5A 2012-11-23 2012-11-23 The system and method for a kind of POE Power over Ethernet lightning protection Active CN102969706B (en)

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CN104079151A (en) * 2014-07-22 2014-10-01 诸暨市沃思环保技术有限公司 Anti-jamming circuit for ventilator room power supply system driver module of buried sewage disposal device
CN107658861A (en) * 2017-10-20 2018-02-02 京信通信系统(中国)有限公司 A kind of anti-POE power supplies misplug the protection circuit and method pulled out

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CN102723706A (en) * 2012-05-30 2012-10-10 武汉烽火网络有限责任公司 PoE port overvoltage comprehensive protection circuit and method for realizing same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1801720A (en) * 2006-01-17 2006-07-12 杭州华为三康技术有限公司 Method and apparatus for supplying power to external device via Ethernet
CN201018518Y (en) * 2007-02-12 2008-02-06 赵福江 Ethernet power supply overvoltage protector
US7679878B2 (en) * 2007-12-21 2010-03-16 Broadcom Corporation Capacitor sharing surge protection circuit
CN201523227U (en) * 2009-10-29 2010-07-07 百圳君耀电子(深圳)有限公司 Ethernet surge protection circuit
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