CN204464985U - A kind of POE system protection circuit and POE guard system - Google Patents
A kind of POE system protection circuit and POE guard system Download PDFInfo
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- CN204464985U CN204464985U CN201520201991.XU CN201520201991U CN204464985U CN 204464985 U CN204464985 U CN 204464985U CN 201520201991 U CN201520201991 U CN 201520201991U CN 204464985 U CN204464985 U CN 204464985U
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Abstract
The utility model discloses a kind of POE system protection circuit and POE guard system, POE system protection circuit is for protecting POE system, comprise the first protective device and the second protective device, the first end of the first protective device and the first end ground connection of the second protective device, the other end of the first protective device and the other end of the second protective device and the right transmission line of arbitrary transmission line connect one to one; The cut-in voltage of the first protective device and the cut-in voltage sum of the second protective device be greater than transmission line when PSE device is powered or when PD equipment is powered between voltage, when between transmission line pair, surge appears in (between differential mode), the first protective device of series connection and the second protective device form bleed-off circuit; When there is single transmission line (common mode over the ground between) thunderbolt or surge, because transmission line does not have pressure reduction over the ground, directly release thunder and lightning to ground by the protective device be connected with single transmission line, reduce element number, reduce the space of PCB, area and mounting time.
Description
Technical field
The utility model relates to POE (Power Over Ethernet), and power protection field, is specifically related to a kind of POE system protection circuit and POE guard system.
Background technology
POE is referred to and to be powered by 100BASE-TX, 1000BASE-T ethernet network.In this way, effectively can solve IP phone, wireless aps, portable equipment charger, machine for punching the card, camera, the centralized power of the terminals such as data acquisition is powered, the problem considering its indoor power supply system wiring is no longer needed for these terminals, by with power supply unit (PSE, Power Sourcing Equipment) holding wire that connects is to while access network, just can by the holding wire that is connected with PSE device to or dead pair realize PSE device to power receiving equipment (PD, Power Device) power supply, current PoE powers and there has also been unified standard, as long as follow the 802.3af standard issued, just can solve the problem of the suitability between devices from different manufacturers.
At present, the growth momentum of power over Ethernet POE is very powerful, is widely used in the industrial systems such as security protection, communication and intelligent grid, in order to realize intrasystem data, transmission of video, flow control and to realize power supply by bus.But harsh due to Industrial Ethernet operational environment, for the surge of POE port and electrostatic defending essential.Existing POE port-guard scheme not only mates protective device between differential mode signal transmission line pair, also to mate independently protective device for common-mode signal transmission line, the space of components and parts many busy lines plate, area and mounting time, and components and parts distribution dispersion, also the area of more multi-line plate is taken, and increasing the complexity of fabric swatch design, step when performance and circuit test is more loaded down with trivial details.
Utility model content
The embodiment of the present application provides a kind of POE system protection circuit and POE guard system, and solve existing POE system protective device many, operation is many, and the area taking PCB is comparatively large, the problem that production efficiency is low.
First aspect, the embodiment of the present application provides a kind of POE system protection circuit, for protecting described POE system, wherein said POE system comprises PSE device or PD equipment, at least one pair of transmission line pair, described POE system protection circuit comprises the first protective device and the second protective device, the first end of described first protective device and the first end of described second protective device are earth terminal, and the other end of described first protective device and the other end of described second protective device are used for the transmission line right with arbitrary described transmission line and connect one to one;
The cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device be greater than described transmission line when described PSE device is powered or when described PD equipment is powered between voltage, and be less than described transmission line when described PSE device is powered or when described PD equipment is powered between 2 times of voltage.
Based on first aspect, in the implementation that the first is possible, described transmission line when described PSE device is powered or when described PD equipment is powered between voltage be greater than or equal to 44V, be less than or equal to 57V, the cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device are greater than 44V, and are less than or equal to 70V.
Based on the first possible implementation of first aspect, in the implementation that the second is possible, the cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device are 60V.
Based on the implementation that the second of first aspect is possible, in the implementation that the third is possible, the cut-in voltage of described first protective device is 30V, and the cut-in voltage of described second protective device is 30V.
Based on the third possible implementation of first aspect, in the 4th kind of possible implementation, described first protective device is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube; Described second protective device is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube.
Based on first aspect and the first possible implementation of first aspect to any one the possible implementation in the 4th kind of possible implementation, in the 5th kind of possible implementation, described POE system protection circuit also comprises the packaging part for encapsulating described first protective device and described second protective device.
Based on the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation, described POE system protection circuit also comprises three the external leads ends extending to packaging part outside, one of them external leads ends is the common port of the first end of described first protective device and the first end common ground of described second protective device, and two other external leads ends is the second end of described first protective device and the second end of described second protective device.
The second aspect of the present embodiment provides a kind of POE guard system, comprises PSE device or PD equipment, at least one pair of transmission line pair, each transmission line between connect described POE system protection circuit; Described transmission line is to comprising 2 transmission lines;
Described POE system protection circuit comprises the first protective device and the second protective device, the first end of described first protective device and the first end of described second protective device are used for ground connection, and the other end of described first protective device connects one to one with 2 transmission lines of the other end of described second protective device with the corresponding described transmission line centering be connected;
The cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device be greater than described transmission line when described PSE device is powered or when described PD equipment is powered between voltage, and be less than described transmission line when described PSE device is powered or when described PD equipment is powered between 2 times of voltage.
Based on second aspect, in the implementation that the first is possible, described transmission line when described PSE device is powered or when described PD equipment is powered between voltage be greater than or equal to 44V, be less than or equal to 57V, the cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device are greater than 44V, and are less than or equal to 70V.
Based on the first possible implementation of second aspect, in the implementation that the second is possible, the cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device are 60V.
Based on the implementation that the second of second aspect is possible, in the implementation that the third is possible, the cut-in voltage of described first protective device is 30V, and the cut-in voltage of described second protective device is 30V.
Based on the third possible implementation of second aspect, in the 4th kind of possible implementation, described first protective device is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube; Described second protective device is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube.
Based on the first possible implementation of second aspect and second aspect to any one the possible implementation in the 4th kind of possible implementation, in the 5th kind of possible implementation, described POE system protection circuit also comprises the packaging part for encapsulating described first protective device and described second protective device.
Based on the 5th kind of possible implementation of second aspect, in the 6th kind of possible implementation, described POE guard system, also comprises at least one first electric capacity connected one to one with each transmission lines, first resistance of connecting with all first electric capacity one_to_one corresponding; The first end of described first electric capacity is connected to the transmission line that connect corresponding to described first electric capacity, and the other end of described first electric capacity is connected to the first end of described first resistance;
Described POE system protection circuit also comprises the second electric capacity, and the first end of described second electric capacity is connected to the second end of described all first resistance, and the second end of described second electric capacity is connected to ground.
Based on the 6th kind of possible implementation of second aspect, in the 7th kind of possible implementation, described POE guard system also comprises at least one transformer, and all transformers are connected one to one by centre cap and all transmission lines.
Based on second aspect, in the 8th kind of possible implementation, when described POE guard system comprises PSE device, every a pair transmission line is to being connected to described PSE device;
When described POE guard system comprises PD equipment, described POE guard system also comprise each transmission line between connect rectifier bridge, the first input end of each rectifier bridge connects one to one with 2 transmission lines of the second input with the corresponding transmission line centering be connected, first output of all rectifier bridges is connected to one end of described PD equipment jointly, and the second output of all rectifier bridges is connected to the other end of described PD equipment jointly.
The POE system protection circuit that the embodiment of the present application provides and POE guard system, for protecting described POE system, described POE system protection circuit comprises the first protective device and the second protective device, the first end of described first protective device and the first end of described second protective device are used for ground connection, and the other end of described first protective device and the other end of described second protective device are used for the transmission line right with arbitrary described transmission line and connect one to one; The cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device be greater than described transmission line when described PSE device is powered or when described PD equipment is powered between voltage, and be less than described transmission line when described PSE device is powered or when described PD equipment is powered between 2 times of voltage.Adopt series connection the first protective device and the second protective device can realize transmission line between lightning surge protection, transmission line between (between differential mode) occur thunderbolt or surge time, through the first protective device and the second protective device formation bleed-off circuit of series connection, when there is single transmission line (common mode over the ground between) thunderbolt or surge, because transmission line does not have pressure reduction over the ground, then after protective device action, directly release thunder and lightning to ground by the protective device be connected with single transmission line, decrease component counts, decrease the space of wiring board, area and mounting time.In addition; as one preferred embodiment, the cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device are 60V, then the cut-in voltage value of protective device is less; residual voltage after its action is less, and the impact that protected circuit is subject to residual voltage is less.In addition, as one preferred embodiment, described POE system protection circuit also comprises the packaging part for encapsulating described first protective device and described second protective device, two-in-one Integrated Solution decreases the wiring board area that components and parts distribution disperses to take, decrease the complexity of fabric swatch design, decrease step when client performance and circuit test.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
A kind of POE system protection circuit structure figure that Fig. 1 provides for the embodiment of the present application;
A kind of POE guard system circuit diagram that Fig. 2 a provides for the present embodiment;
The another kind of POE guard system circuit diagram that Fig. 2 b provides for the present embodiment;
The another kind of POE guard system circuit diagram that Fig. 2 c provides for the present embodiment;
The another kind of POE guard system circuit diagram that Fig. 2 d provides for the present embodiment;
The another kind of POE guard system circuit diagram that Fig. 2 e provides for the present embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, be clearly and completely described the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Below by specific embodiment, be described in detail respectively.
POE technology can ensure the normal operation of existing network while guaranteeing existing structureization wiring safety, reduces costs to greatest extent.Refer to Fig. 1, a kind of POE system protection circuit structure figure that Fig. 1 provides for the embodiment of the present application.As shown in Figure 1, the present embodiment provides a kind of POE system protection circuit, for protecting POE system, wherein POE system comprises PSE device or PD equipment, at least one pair of transmission line pair being connected to PSE device or being connected to PD equipment by rectifier bridge, POE system protection circuit comprises the first protective device 110 and the second protective device 120, the first end of the first protective device 110 and the first end of the second protective device 120 are used for ground connection, the other end of the first protective device 110 and the other end of the second protective device 120 are used for the transmission line right with arbitrary transmission line and connect one to one, the cut-in voltage of the first protective device 110 and the cut-in voltage sum of the second protective device 120 be greater than transmission line when PSE device is powered or when PD equipment is powered between voltage, and be less than transmission line when PSE device is powered or when PD equipment is powered between 2 times of voltage.
Adopt in the present embodiment the first protective device 110 of series connection and the second protective device 120 can realize transmission line between lightning surge protection, transmission line between (between differential mode) occur thunderbolt or surge time, the first protective device 110 and the second protective device 120 that pass through series connection form bleed-off circuit, when there is single transmission line (common mode over the ground between) thunderbolt or surge, because transmission line does not have pressure reduction over the ground, then after the first protective device 110 or the second protective device 120 action, directly release thunder and lightning to ground by the protective device connected corresponding to single transmission line.
The basic IEEE802.3af standard that POE technology realizes is the new standard based on Power over Ethernet system POE, it adds the relevant criterion of directly being powered by netting twine on the basis of IEEE802.3, being the expansion of existing ethernet standard, is also first international standard about power distribution.In POE technical standard, the output voltage values scope of regulation PSE device is 44V ~ 57V or 50V ~ 57V, and power cable is to for 2 right.
As the optional mode of one, the receiving voltage of the supply power voltage of PSE device or PD equipment is specified to be greater than or equal to 44V in the present embodiment, be less than or equal to 57V, select when the first protective device 110 and the second protective device 120, to consider that the cut-in voltage of the first protective device 110 and the cut-in voltage sum of the second protective device 120 are greater than 44V, and be less than or equal to 70V.In the present embodiment, when the cut-in voltage of the first protective device 110 and the cut-in voltage sum of the second protective device 120 are greater than 44V, can ensure to be in static state without protective device during overpressure situation, circuit can maintain normal work; When the cut-in voltage of the first protective device 110 and the cut-in voltage sum of the second protective device 120 are less than or equal to 70V, when there are the abnormal conditions such as overvoltage, protective device starts action and protects.
The cut-in voltage value of the first protective device 110 or the second protective device 120 is less, residual voltage after its action is less, therefore as one preferred embodiment, the cut-in voltage of the first protective device 110 and the cut-in voltage sum of the second protective device 120 are 60V.
As one preferred embodiment, the cut-in voltage of the first protective device 110 is 30V, and the cut-in voltage of the second protective device 120 is 30V.
As one preferred embodiment, the first protective device 110 is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube; Second protective device 120 is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube.
As one preferred embodiment, POE system protection circuit also comprises the packaging part for encapsulating the first protective device 110 and the second protective device 120.As shown in Figure 1, POE system protection circuit is an integration packaging part, achieve two-in-one protective device Integrated Solution, comprise three external leads ends, one of them external leads ends is the common port of the first end of the first protective device 110 and the first end common ground of the second protective device 120, two other external leads ends is the second end of the first protective device 110 and the second end of the second protective device 120, two-in-one protective device Integrated Solution further saves complexity and the area of fabric swatch design, improves procurement efficiency and production efficiency.In other embodiments, integration packaging part can comprise 4 external leads ends, and the first end of the first protective device 110 and the first end of the second protective device 120 can realize in outside connecing altogether, and concrete packing forms is not by the restriction of the present embodiment.The two-in-one Integrated Solution that the present embodiment provides decreases the wiring board area that components and parts distribution disperses to take, and decreases the complexity of fabric swatch design, decreases step when client performance and circuit test.
The another aspect of the present embodiment provides a kind of POE guard system, and comprise PSE device or PD equipment, at least one pair of is connected to the transmission line pair of PSE device or PD equipment, be connected to each transmission line between POE system protection circuit.Because the transmission line be connected with PSE device in regulation POE system in the standard carried out at present is to being 2 pairs of transmission lines pair, and in PSE device side often pair of transmission line to comprising 2 transmission lines, when POE guard system comprises PSE device, every a pair transmission line is to being connected to PSE device; When in the standard carried out at present in addition, regulation POE guard system comprises PD equipment, POE guard system also comprise each transmission line between connect rectifier bridge, the first input end of each rectifier bridge connects one to one with 2 transmission lines of the second input with the corresponding transmission line centering be connected, first output of all rectifier bridges is connected to one end of PD equipment jointly, second output of all rectifier bridges is connected to the other end of PD equipment jointly, is namely converted into a pair transmission line pair with the transmission line of PD equipment connection to when PD equipment side is powered in POE system.Then for two pairs of transmission lines, POE guard system when powering to PSE device side is described in the present embodiment, specifically can refer to the explanation of following Fig. 2 a to Fig. 2 d; And POE guard system time powered to PD equipment side with Fig. 2 e is in the present embodiment described.
Refer to Fig. 2 a, a kind of POE guard system circuit diagram that Fig. 2 a provides for the present embodiment, as shown in Figure 2 a, then POE guard system circuit comprises PSE device 210, 2 pairs of transmission lines are to (first pair of transmission line is to comprising transmission line 220 and transmission line 221, second pair of transmission line is to comprising transmission line 222 and 223), 2 POE system protection circuits, POE system protection circuit 230 and POE system protection circuit 231 respectively, each POE system protection circuit comprises the first protective device T1 and the second protective device T2, the first end of the first protective device T1 and the first end of the second protective device T2 are used for ground connection, the other end of the first protective device T1 of POE system protection circuit 230 and the other end of the second protective device T2 and the right transmission line 220 of the first pair of transmission line and transmission line 221 connect one to one, the other end of the first protective device T1 of POE system protection circuit 231 and the other end of the second protective device T2 and the right transmission line 222 of the first pair of transmission line and transmission line 223 connect one to one, the cut-in voltage of the first protective device T1 and the cut-in voltage sum of the second protective device T2 are greater than the supply power voltage of PSE device, and be less than transmission line when PSE device is powered between 2 times of voltage.
As the optional mode of one, the supply power voltage of PSE device is specified to be greater than or equal to 44V in the present embodiment, be less than or equal to 57V, select during the first protective device T1 and the second protective device T2, to consider that the cut-in voltage of the first protective device T1 and the cut-in voltage sum of the second protective device T2 are greater than 44V, and be less than or equal to 70V.In the present embodiment, when the cut-in voltage of the first protective device T1 and the cut-in voltage sum of the second protective device T2 are greater than 44V, can ensure to be in static state without protective device during overpressure situation, circuit can maintain normal work; When the cut-in voltage of the first protective device T1 and the cut-in voltage sum of the second protective device T2 are less than or equal to 70V, when there are the abnormal conditions such as overvoltage, protective device starts action and protects.
The cut-in voltage value of protective device is less; residual voltage after its action is less; therefore as one preferred embodiment, the cut-in voltage of the first protective device T1 and the cut-in voltage sum of the second protective device T2 are 60V, and the impact that protected circuit is subject to residual voltage is less.
As one preferred embodiment, the cut-in voltage of the first protective device T1 is 30V, and the cut-in voltage of the second protective device T2 is 30V.
As one preferred embodiment, the first protective device T1 is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube; Second protective device T2 is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube.
As one preferred embodiment, POE system protection circuit also comprises the packaging part for encapsulating the first protective device T1 and the second protective device T2.As shown in Figure 1, POE system protection circuit is an integration packaging part, achieve two-in-one protective device Integrated Solution, comprise three external leads ends, one of them external leads ends is the common port of the first end of the first protective device T1 and the first end common ground of the second protective device T2, two other external leads ends is second end of the first protective device T1 and second end of the second protective device T2, two-in-one protective device Integrated Solution further saves complexity and the area of fabric swatch design, improves procurement efficiency and production efficiency.In other embodiments, integration packaging part can comprise 4 external leads ends, and the first end of the first protective device T1 and the first end of the second protective device T2 can realize in outside connecing altogether, and concrete packing forms is not by the restriction of the present embodiment.The two-in-one Integrated Solution that the present embodiment provides decreases the wiring board area that components and parts distribution disperses to take, and decreases the complexity of fabric swatch design, decreases step when client performance and circuit test.
As the optional execution mode of one, POE guard system circuit also comprises at least one first electric capacity connected one to one with each transmission lines, the first resistance connected one to one with all first electric capacity, the second electric capacity.Refer to Fig. 2 b, the another kind of POE guard system circuit diagram that Fig. 2 b provides for the present embodiment.As shown in Figure 2 b, comprise 4 the first electric capacity C1 in the present embodiment, 4 the first resistance R, the second electric capacity C2; The first end of each the first electric capacity C1 is connected to and the corresponding transmission line connected of this first electric capacity C1, the other end of this first electric capacity C1 is connected to the first end of the first resistance R, the first end of the second electric capacity C2 is connected to second end of all first resistance R, and second end of the second electric capacity C2 is connected to ground.
As the optional execution mode of one, refer to Fig. 2 c, the another kind of POE guard system circuit diagram that Fig. 2 c provides for the present embodiment.As shown in Figure 2 c, POE guard system circuit also comprises at least one transformer T3, and all transformers are connected one to one by centre cap and all transmission lines.
As the optional execution mode of one, refer to Fig. 2 d, the another kind of POE guard system circuit diagram that Fig. 2 d provides for the present embodiment.As shown in Figure 2 d, POE guard system circuit also comprises at least one second protective device T4, and all second protective device T4 are by connecting one to one with the primary side of all transformers.
The another aspect of the present embodiment provides a kind of POE guard system, comprises PD equipment, at least one pair of transmission line pair, each transmission line between connect POE system protection circuit, each transmission line between connect rectifier bridge, transmission line is to comprising 2 transmission lines, the first input end of each rectifier bridge connects one to one with 2 transmission lines of the second input with the corresponding transmission line centering be connected, first output of all rectifier bridges is connected to one end of PD equipment jointly, second output of all rectifier bridges is connected to the other end of PD equipment jointly, and POE system protection circuit comprises the first protective device and the second protective device, the first end of the first protective device and the first end of the second protective device are used for ground connection, the other end of the first protective device connects one to one with 2 transmission lines of the other end of the second protective device with the corresponding transmission line centering be connected, the cut-in voltage of the first protective device and the cut-in voltage sum of the second protective device be greater than PD equipment powered time transmission line between voltage, and be less than PD equipment powered time transmission line between 2 times of voltage.Refer to Fig. 2 e, the another kind of POE guard system circuit diagram that Fig. 2 e provides for the embodiment of the present application, as shown in Figure 2 e, the POE guard system PD equipment 240 that the present embodiment provides, 2 pairs of transmission lines are to (first pair of transmission line is to comprising transmission line 220 and transmission line 221, second pair of transmission line is to comprising transmission line 222 and 223), 2 rectifier bridges (rectifier bridge M1 and rectifier bridge M2), 2 POE system protection circuits, POE system protection circuit 230 and POE system protection circuit 231 respectively, wherein each POE system protection circuit comprises the first protective device T1 and the second protective device T2, the first end of the first protective device T1 and the first end of the second protective device T2 are used for ground connection, the other end of the first protective device T1 of POE system protection circuit 230 and the other end of the second protective device T2 and the right transmission line 220 of the first pair of transmission line and transmission line 221 connect one to one, the other end of the first protective device T1 of POE system protection circuit 231 and the other end of the second protective device T2 and the right transmission line 222 of the first pair of transmission line and transmission line 223 connect one to one, and the first input end m1 of rectifier bridge M1 connects one to one with 2 transmission lines (transmission line 220 and transmission line 221) of corresponding the first transmission line centering be connected with the second input m2, the first input end m1 of rectifier bridge M2 connects one to one with 2 transmission lines (transmission line 222 and transmission line 223) of corresponding the second transmission line centering be connected with the second input m2, first output m3 of all rectifier bridges is connected to one end of PD equipment 240 jointly, second output m4 of all rectifier bridges is connected to the other end of PD equipment 240 jointly, namely the effect of rectifier bridge M1 and rectifier bridge M2 is that two pairs of transmission lines (transmission line 220 and transmission line 221 and transmission line 222 and transmission line 223) are changed into a pair transmission line with PD equipment connection at PD equipment side.Wherein, the voltage between transmission line when the cut-in voltage of the first protective device T1 and the cut-in voltage sum of the second protective device T2 are greater than PD equipment powered pair, and be less than PD equipment powered time transmission line between 2 times of voltage.
As the optional execution mode of one, as shown in Figure 2 e, transmission line when PD equipment 240 is powered between voltage be greater than or equal to 44V, be less than or equal to 57V, the cut-in voltage of the first protective device T1 and the cut-in voltage sum of the second protective device T2 are greater than 44V, and are less than or equal to 70V.In the present embodiment, when the cut-in voltage of the first protective device T1 and the cut-in voltage sum of the second protective device T2 are greater than 44V, can ensure to be in static state without protective device during overpressure situation, circuit can maintain normal work; When the cut-in voltage of the first protective device T1 and the cut-in voltage sum of the second protective device T2 are less than or equal to 70V, when there are the abnormal conditions such as overvoltage, protective device starts action and protects.
As the optional execution mode of one, the cut-in voltage of the first protective device T1 and the cut-in voltage sum of the second protective device T2 are 60V.
As the optional execution mode of one, the cut-in voltage of the first protective device T1 is 30V, and the cut-in voltage of the second protective device T2 is 30V.
As the optional execution mode of one, the first protective device T1 is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube; Second protective device T2 is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube.
As the optional execution mode of one, as shown in Figure 2 e, POE system protection circuit also comprises the packaging part for encapsulating the first protective device T1 and the second protective device T2, to realize the two-in-one integrated of the first protective device T1 and the second protective device T2.
As the optional execution mode of one, POE guard system circuit also comprises at least one first electric capacity connected one to one with each transmission lines, the first resistance connected one to one with all first electric capacity, the second electric capacity.As shown in Figure 2 e, comprise 4 the first electric capacity C1 in the present embodiment, 4 the first resistance R, the second electric capacity C2; The first end of each the first electric capacity C1 is connected to and the corresponding transmission line connected of this first electric capacity C1, the other end of this first electric capacity C1 is connected to the first end of the first resistance R, the first end of the second electric capacity C2 is connected to second end of all first resistance R, and second end of the second electric capacity C2 is connected to ground.
As the optional execution mode of one, as shown in Figure 2 e, POE guard system also comprises at least one transformer T3, and all transformer T3 are connected one to one by centre cap and all transmission lines.
As the optional execution mode of one, as shown in Figure 2 e, POE guard system circuit also comprises at least one second protective device T4, and all second protective device T4 are by connecting one to one with the primary side of all transformers.To sum up describe, the POE system protection circuit that the embodiment of the present application provides and guard system, for protecting POE system, POE system protection circuit comprises the first protective device and the second protective device, the first end of the first protective device and the first end of the second protective device are used for ground connection, and the other end of the first protective device and the other end of the second protective device are used for the transmission line right with arbitrary transmission line and connect one to one; The cut-in voltage of the first protective device and the cut-in voltage sum of the second protective device be greater than transmission line when PSE device is powered between voltage.Adopt series connection the first protective device and the second protective device can realize transmission line between lightning surge protection, transmission line between (between differential mode) occur thunderbolt or surge time, through the first protective device and the second protective device formation bleed-off circuit of series connection, when there is single transmission line (common mode over the ground between) thunderbolt or surge, because transmission line does not have pressure reduction over the ground, then after protective device action, directly release thunder and lightning to ground by the protective device be connected with single transmission line, decrease component counts, decrease the space of wiring board, area and mounting time.In addition; as one preferred embodiment, the cut-in voltage of the first protective device and the cut-in voltage sum of the second protective device are 60V, then the cut-in voltage value of protective device is less; residual voltage after its action is less, and the impact that protected circuit is subject to residual voltage is less.In addition, as one preferred embodiment, POE system protection circuit also comprises the packaging part for encapsulating the first protective device and the second protective device, two-in-one Integrated Solution decreases the wiring board area that components and parts distribution disperses to take, decrease the complexity of fabric swatch design, decrease step when client performance and circuit test.In several embodiments that the application provides; should be understood that; more than describe; be only the embodiment of the application; but the protection range of the application is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the application discloses, amendment or the replacement of various equivalence can be expected easily, these amendments or replace all should be encompassed in the application protection range within.
Claims (16)
1. a POE system protection circuit, for protecting described POE system, wherein said POE system comprises PSE device or PD equipment, at least one pair of transmission line pair, it is characterized in that, described POE system protection circuit comprises the first protective device and the second protective device, the first end of described first protective device and the first end of described second protective device are earth terminal, and the other end of described first protective device and the other end of described second protective device are used for the transmission line right with arbitrary described transmission line and connect one to one;
The cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device be greater than described transmission line when described PSE device is powered or when described PD equipment is powered between voltage, and be less than described transmission line when described PSE device is powered or when described PD equipment is powered between 2 times of voltage.
2. POE system protection circuit as claimed in claim 1, it is characterized in that, described transmission line when described PSE device is powered or when described PD equipment is powered between voltage be greater than or equal to 44V, be less than or equal to 57V, the cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device are greater than 44V, and are less than or equal to 70V.
3. POE system protection circuit as claimed in claim 2, it is characterized in that, the cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device are 60V.
4. POE system protection circuit as claimed in claim 3, it is characterized in that, the cut-in voltage of described first protective device is 30V, and the cut-in voltage of described second protective device is 30V.
5. POE system protection circuit as claimed in claim 4, it is characterized in that, described first protective device is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube; Described second protective device is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube.
6., as the POE system protection circuit as described in arbitrary in claim 1 to 5, it is characterized in that, described POE system protection circuit also comprises the packaging part for encapsulating described first protective device and described second protective device.
7. POE system protection circuit as claimed in claim 6, it is characterized in that, described POE system protection circuit also comprises three the external leads ends extending to packaging part outside, one of them external leads ends is the common port of the first end of described first protective device and the first end common ground of described second protective device, and two other external leads ends is the second end of described first protective device and the second end of described second protective device.
8. a POE guard system, is characterized in that, comprises PSE device or PD equipment, at least one pair of transmission line pair, each transmission line between connect described POE system protection circuit; Described transmission line is to comprising 2 transmission lines;
Described POE system protection circuit comprises the first protective device and the second protective device, the first end of described first protective device and the first end of described second protective device are used for ground connection, and the other end of described first protective device connects one to one with 2 transmission lines of the other end of described second protective device with the corresponding described transmission line centering be connected;
The cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device be greater than described transmission line when described PSE device is powered or when described PD equipment is powered between voltage, and be less than described transmission line when described PSE device is powered or when described PD equipment is powered between 2 times of voltage.
9. POE guard system as claimed in claim 8, it is characterized in that, described transmission line when described PSE device is powered or when described PD equipment is powered between voltage be greater than or equal to 44V, be less than or equal to 57V, the cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device are greater than 44V, and are less than or equal to 70V.
10. POE guard system as claimed in claim 9, it is characterized in that, the cut-in voltage of described first protective device and the cut-in voltage sum of described second protective device are 60V.
11. POE guard systems as claimed in claim 10, it is characterized in that, the cut-in voltage of described first protective device is 30V, the cut-in voltage of described second protective device is 30V.
12. POE guard systems as claimed in claim 11, is characterized in that, described first protective device is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube; Described second protective device is the arbitrary device among piezo-resistance, Transient Suppression Diode, semiconductor discharge tube, gas discharge tube.
13. as the POE guard system as described in arbitrary in claim 8 to 12, and it is characterized in that, described POE system protection circuit also comprises the packaging part for encapsulating described first protective device and described second protective device.
14. POE guard systems as claimed in claim 13, is characterized in that, also comprise at least one first electric capacity connected one to one with each transmission lines, first resistance of connecting with all first electric capacity one_to_one corresponding; The first end of described first electric capacity is connected to the transmission line that connect corresponding to described first electric capacity, and the other end of described first electric capacity is connected to the first end of described first resistance;
Described POE system protection circuit also comprises the second electric capacity, and the first end of described second electric capacity is connected to the second end of described all first resistance, and the second end of described second electric capacity is connected to ground.
15. POE guard systems as claimed in claim 14, it is characterized in that, also comprise at least one transformer, all transformers are connected one to one by centre cap and all transmission lines.
16. POE guard systems as claimed in claim 8, is characterized in that, when described POE guard system comprises PSE device, every a pair transmission line is to being connected to described PSE device; When described POE guard system comprises PD equipment, described POE guard system also comprise each transmission line between connect rectifier bridge, the first input end of each rectifier bridge connects one to one with 2 transmission lines of the second input with the corresponding transmission line centering be connected, first output of all rectifier bridges is connected to one end of described PD equipment jointly, and the second output of all rectifier bridges is connected to the other end of described PD equipment jointly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520201991.XU CN204464985U (en) | 2015-04-03 | 2015-04-03 | A kind of POE system protection circuit and POE guard system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520201991.XU CN204464985U (en) | 2015-04-03 | 2015-04-03 | A kind of POE system protection circuit and POE guard system |
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| CN204464985U true CN204464985U (en) | 2015-07-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105047642A (en) * | 2015-08-12 | 2015-11-11 | 深圳市槟城电子有限公司 | Port protection circuit integrated encapsulation component |
| CN106602505A (en) * | 2017-02-16 | 2017-04-26 | 深圳市菲菱科思通信技术股份有限公司 | Non-standard PoE power supply system used for Ethernet |
| CN106712971A (en) * | 2016-12-16 | 2017-05-24 | 上海市共进通信技术有限公司 | Butt joint protection device and system based on Ethernet device with POE function |
| CN110581540A (en) * | 2018-06-08 | 2019-12-17 | 华为技术有限公司 | power supply equipment and power over Ethernet system |
| CN114597880A (en) * | 2022-03-04 | 2022-06-07 | 深圳市吉祥腾达科技有限公司 | Net mouth lightning protection system of floating equipment |
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2015
- 2015-04-03 CN CN201520201991.XU patent/CN204464985U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047642A (en) * | 2015-08-12 | 2015-11-11 | 深圳市槟城电子有限公司 | Port protection circuit integrated encapsulation component |
| CN105047642B (en) * | 2015-08-12 | 2024-01-19 | 深圳市槟城电子股份有限公司 | Port protection circuit integrated package |
| CN106712971A (en) * | 2016-12-16 | 2017-05-24 | 上海市共进通信技术有限公司 | Butt joint protection device and system based on Ethernet device with POE function |
| CN106712971B (en) * | 2016-12-16 | 2020-05-01 | 上海市共进通信技术有限公司 | Protection device and system based on butt joint of Ethernet equipment with POE function |
| CN106602505A (en) * | 2017-02-16 | 2017-04-26 | 深圳市菲菱科思通信技术股份有限公司 | Non-standard PoE power supply system used for Ethernet |
| CN110581540A (en) * | 2018-06-08 | 2019-12-17 | 华为技术有限公司 | power supply equipment and power over Ethernet system |
| US11183838B2 (en) | 2018-06-08 | 2021-11-23 | Huawei Technologies Co., Ltd. | Power sourcing equipment and power over ethernet system |
| CN114597880A (en) * | 2022-03-04 | 2022-06-07 | 深圳市吉祥腾达科技有限公司 | Net mouth lightning protection system of floating equipment |
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