CN201629463U - RJ45 connector and Ethernet power supply system - Google Patents
RJ45 connector and Ethernet power supply system Download PDFInfo
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- CN201629463U CN201629463U CN2010201380344U CN201020138034U CN201629463U CN 201629463 U CN201629463 U CN 201629463U CN 2010201380344 U CN2010201380344 U CN 2010201380344U CN 201020138034 U CN201020138034 U CN 201020138034U CN 201629463 U CN201629463 U CN 201629463U
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Abstract
The utility model relates to the field of Ethernet power supply, particularly to an RJ45 connector and an Ethernet power supply system, which can prevent the influence on the resistance value between power supply line pairs when an RJ45 jack is connected to the high voltage caused by lightning strike. The RJ45 connector comprises a fifth isolating transformer connected with power supply equipment and the central taps of a first isolating transformer and a second isolating transformer; a first capacitor and a first resistor, which are connected in series, and then one end of the serially-connected structure is connected with the central tap of the first isolating transformer and the other end while is grounded through a fifth capacitor; a second capacitor and a second resistor, which are connected in series, and then one end of the serially-connected structure is connected with the central tap of the second isolating transformer while the other end thereof is grounded through the fifth capacitor; a third capacitor and a third resistor, which are connected in series, and then one end of the serially-connected structure is connected with the central tap of a third isolating transformer while the other end thereof is grounded through a sixth capacitor; and a fourth capacitor and a fourth resistor, which are connected in series, and then one end of the serially-connected structure is connected with the central tap of a fourth isolating transformer while the other end thereof is grounded through the sixth capacitor.
Description
Technical field
The utility model relates to the Power over Ethernet field, especially a kind of RJ45 connector and Power over Ethernet system.
Background technology
PoE (Power over Ethernet, Power over Ethernet) technology is a kind ofly to carry galvanic mode in transmission in the data by the Ethernet cable.Wherein, the PoE system comprises: power supply unit (PowerSource Equipment, PSE), RJ45 connector and power receiving equipment (Powered Device, PD).In the PoE system, provide the equipment of power supply to be called power supply unit, the equipment of accepting the DC power supply that PSE equipment provides is called power receiving equipment.In the PoE system, generally adopt the RJ45 connector, connect PSE and PD, be illustrated in figure 1 as the structure chart of PoE system, the CABLE SIDE (cable-side) of RJ45 connector is wiring cable one end, load is connected with far-end PD by cable; PCB SIDE (physical layer) end of RJ45 connector is connected with the coherent signal of Ethernet switch, wherein CH1+/--CH4+/-be connected with the signal of the correspondence of the physical chip of Ethernet switch, be used for transmission and receive data, pin11, pin12 link to each other with PSE, are used to realize the power supply of PSE to far-end PD load.
Be illustrated in figure 2 as the internal circuit diagram of RJ45 connector, the CABLE end of RJ45 connector has 8 twisted-pair feeders for wiring cable one end, and totally 4 pairs of differential lines are right, are divided into holding wire to (1,2 and 3,6) and dead pair (4,5 and 7,8); The RJ45 connector circuit comprises: isolating transformer T1/A, T2/A, T3/A, T4/A, the secondary coil output of T1/A and T2/A are respectively holding wire to (1,2) and (3,6), and the secondary coil output of T3/A and T4/A is respectively dead pair; Also comprise capacitor C 1, C2, C3, C4, capacitance is 0.022uF, and withstand voltage is 250V, resistance R 1, R2, R3, R4, resistance is 75OHM, and each electric capacity and resistance are formed filter circuit respectively, to sending to holding wire the ethernet signal with dead pair is carried out filtering.T5 is an isolating transformer, and pin11, pin12 link to each other with PSE, and the differential lines that is coupled to CABLE end by T5 is the PD electric of far-end to last then.
PoE powered operation process is: testing process, PD hold device class, begin power supply, power, cut off the power supply.Wherein, testing process is the detection voltage that PSE sends a 2.8V-10V, be used to detect the PD that cable terminations connects and whether meet the IEEE802.3af standard, only meet the IEEE802.3af standard, could power for PD, a PD who meets the IEEE802.3af standard, its supply lines between resistance and electric capacity following requirement: 19K≤Rgood≤26.5K and Cgood≤150nF are arranged; A PD who does not meet IEEE802.3af, its supply lines between resistance and electric capacity be: Rbad＜15K or Rbad＞33K or Cbad＞10uF.
When the RJ45 connector connects the PD load, supply lines between resistance equivalent circuit diagram as shown in Figure 3, RJ45CABLE end supply lines to the resistance Rab between the AB and far-end PD electric line between resistance Rpd be in parallel the relation, after the parallel connection, PD electric line between equivalent resistance R=1/ (1/Rab+1/Rpd).Because the equivalent resistance of C1, C2 is infinitely great, so the resistance Rab between AB be infinity, according to R=1/ (1/Rab+1/Rpd), can obtain PD electric line between resistance R=Rpd.
When power supply units such as Ethernet switch are power receiving equipment such as IP phone machine, wireless local network connecting point AP, secure network video camera and some other IP-based terminal transmission data-signal, kind equipment provides the ability of direct current supply for this reason, but for Ethernet switch, its wiring system more is a portion outside the building, therefore easier the thunderbolt.Thunderbolt is that the cable of portion discharges to laying outside the building, and lightning wave on the cable or overvoltage are almost invaded power supply unit, caused power supply unit to damage along cable line with the light velocity.
Therefore, when being struck by lightning, the holding wire of the CABLE end that the high pressure that thunderbolt produces can be by the RJ45 connector to or dead pair come in, by the internal circuit of RJ45 connector, arrive the PCB end, the high pressure that thunderbolt produces is released.
The high pressure that produces when thunderbolt from the holding wire of the CABLE end of RJ45 connector when coming in, when when holding wire is come in to 3,6, the path that electric current passes through is: hold to pin12 through the centre cap of the secondary coil of isolating transformer T2/A from holding wire 3 or 6, the high pressure that thunderbolt produces can be released; When holding wire is come in to 1,2, the path that electric current passes through is: arrive the pin11 end from holding wire 1 or 2 centre caps through the secondary coil of isolating transformer T1/A, the high pressure that thunderbolt produces is released.Like this, when coming in, not by C1, C2, therefore the high pressure that produces of thunderbolt can not puncture C1, C2 the high pressure that produces when thunderbolt from the holding wire of the CABLE end of RJ45 connector.Therefore can not influence the power supply of PSE to far-end PD load.
When the high pressure that produces when being struck by lightning is come in from the dead pair of the CABLE end of RJ45 connector, when when dead pair 7,8 is come in, the path that electric current passes through is: electric current is come in from idle line 7 or 8, arrive the pin11 of PCB end by capacitor C 4, resistance R 4, R1 and capacitor C 1, and, the high pressure that thunderbolt produces is released by the pin12 that C4, R4, R2, C2 arrive the PCB end.Have only capacitor C 4, C2, the C1 of 250V because passed through withstand voltage in this path, so the high pressure (such as 2KV) of working as the thunderbolt generation will cause C4, C2 and C1 to be in half conducting state when coming in to C4, C2 and C1 puncture.Like this, the equivalent resistance of C1, C2 just is not infinitely great, and might be tens K or tens K, therefore in the PSE testing process that load is powered to far-end, because the equivalent resistance of C1, C2 is not infinitely great, according to PD electric line between equivalent resistance R=1/ (1/Rab+1/Rpd), R ≠ Rpd, therefore, in the PSE testing process, might make script meet the Rpd of IEEE802.3af standard, the result of detection becomes the IEEE802.3af standard that do not meet, therefore PSE can be disconnected to PD load appearance erroneous judgement, influences the power supply of PSE to far-end PD load.For example: after C1, C2 are breakdown, the equivalent resistance of C1 and C2 is 25K, be Rab=25K, and the Rpd=20K of standard P D, PD equivalent resistance R=1 (1/25+1/20)=11.1K between the supply lines of back then in parallel, and the resistance of a standard compliant PD is 19K≤Rgood≤26.5K, therefore can make the PD that meets the IEEE802.3af standard originally become the standard of not meeting, just PSE is disconnected to PD load appearance erroneous judgement in testing process, has influenced the power supply of PSE to far-end PD load.
The utility model content
The utility model provides a kind of RJ45 connector circuit and Power over Ethernet system, when the high pressure that produces of can avoiding being struck by lightning is come in from RJ45, to supply lines between resistance impact, it is disconnected to make PSE erroneous judgement can not occur to the judgement of far-end PD load, has guaranteed the reliability and the correctness of PoE function.
A kind of RJ45 connector, comprise: first isolating transformer, second isolating transformer, the 3rd isolating transformer, the 4th isolating transformer, it is right that the secondary coil output of described first isolating transformer and second isolating transformer is respectively holding wire, the secondary coil output of described the 3rd isolating transformer and the 4th isolating transformer is respectively dead pair, and described rj connector also comprises:
The 5th isolating transformer, in two coil one is connected between the centre cap of secondary coil of the positive source of power supply unit PSE and first isolating transformer, and another is connected between the centre cap of secondary coil of the power cathode of power supply unit PSE and second isolating transformer;
First electric capacity and first resistance, second electric capacity and second resistance, and the 5th electric capacity, described first electric capacity is connected the centre cap of the secondary coil of first isolating transformer with branch road one end that first resistance series connection back forms, the other end is by the 5th capacity earth, described second electric capacity is connected the centre cap of the secondary coil of second isolating transformer with branch road one end that second resistance series connection back forms, the other end is by the 5th capacity earth;
The 3rd electric capacity and the 3rd resistance, the 4th electric capacity and the 4th resistance, and the 6th electric capacity, described the 3rd electric capacity is connected the centre cap of the secondary coil of the 3rd isolating transformer with branch road one end that the 3rd resistance series connection back forms, the other end is by the 6th capacity earth, described the 4th electric capacity is connected the centre cap of the secondary coil of the 4th isolating transformer with branch road one end that the 4th resistance series connection back forms, the other end is by the 6th capacity earth.
Further, described RJ45 connector also comprises: the 7th electric capacity is connected between the centre cap of secondary coil of described first isolating transformer and second isolating transformer.
A kind of RJ45 connector, comprise: first isolating transformer, second isolating transformer, the 3rd isolating transformer, the 4th isolating transformer, it is right that the secondary coil output of described first isolating transformer and second isolating transformer is respectively holding wire, the secondary coil output of described the 3rd isolating transformer, the 4th isolating transformer is respectively dead pair, and described RJ45 connector also comprises:
The 5th isolating transformer, in two coil one is connected between the centre cap of secondary coil of the positive source of power supply unit PSE and first isolating transformer, and another is connected between the centre cap of secondary coil of the power cathode of power supply unit PSE and second isolating transformer;
The 3rd electric capacity and the 3rd resistance, the 4th electric capacity and the 4th resistance, and the 5th electric capacity, described the 3rd electric capacity is connected the centre cap of the secondary coil of the 3rd isolating transformer with branch road one end that the 3rd resistance series connection back forms, the other end is by the 5th capacity earth, described the 4th electric capacity is connected the centre cap of the secondary coil of the 4th isolating transformer with branch road one end that the 4th resistance series connection back forms, the other end is by the 5th capacity earth.
Further, described RJ45 connector also comprises:
Second electric capacity and second resistance, branch road one end that described second electric capacity and second resistance series connection back form is connected the power cathode of PSE, other end ground connection; And
First electric capacity and first resistance, branch road one end that described first electric capacity and first resistance series connection back form is connected the positive source of PSE, other end ground connection.
Further, described RJ45 connector also comprises: the 7th electric capacity is connected between the centre cap of secondary coil of described first isolating transformer and second isolating transformer.
A kind of Power over Ethernet system, comprise power supply unit PSE, powered device PD and RJ45 connector, wherein, the RJ45 connector comprises: first isolating transformer, second isolating transformer, the 3rd isolating transformer, the 4th isolating transformer, it is right that the secondary coil output of described first isolating transformer and second isolating transformer is respectively holding wire, the secondary coil output of described the 3rd isolating transformer and the 4th isolating transformer is respectively dead pair, wherein, described RJ45 connector also comprises:
The 5th isolating transformer, in two coil one is connected between the centre cap of secondary coil of the positive source of power supply unit PSE and first isolating transformer, and another is connected between the centre cap of secondary coil of the power cathode of power supply unit PSE and second isolating transformer;
First electric capacity and first resistance, second electric capacity and second resistance, and the 5th electric capacity, described first electric capacity is connected the centre cap of the secondary coil of first isolating transformer with branch road one end that first resistance series connection back forms, the other end is by the 5th capacity earth, described second electric capacity is connected the centre cap of the secondary coil of second isolating transformer with branch road one end that second resistance series connection back forms, the other end is by the 5th capacity earth;
The 3rd electric capacity and the 3rd resistance, the 4th electric capacity and the 4th resistance, and the 6th electric capacity, described the 3rd electric capacity is connected the centre cap of the secondary coil of the 3rd isolating transformer with branch road one end that the 3rd resistance series connection back forms, the other end is by the 6th capacity earth, described the 4th electric capacity is connected the centre cap of the secondary coil of the 4th isolating transformer with branch road one end that the 4th resistance series connection back forms, the other end is by the 6th capacity earth.
Further, the RJ45 connector in the described system also comprises: the 7th electric capacity is connected between the centre cap of secondary coil of described first isolating transformer and second isolating transformer.
A kind of Power over Ethernet system, comprise power supply unit PSE, powered device PD and RJ45 connector, wherein, the RJ45 connector comprises: first isolating transformer, second isolating transformer, the 3rd isolating transformer, the 4th isolating transformer, it is right that the secondary coil output of described first isolating transformer and second isolating transformer is respectively holding wire, the secondary coil output of described the 3rd isolating transformer and the 4th isolating transformer is respectively dead pair, wherein, described RJ45 connector also comprises:
The 5th isolating transformer, in two coil one is connected between the centre cap of secondary coil of the positive source of power supply unit PSE and first isolating transformer, and another is connected between the centre cap of secondary coil of the power cathode of power supply unit PSE and second isolating transformer;
The 3rd electric capacity and the 3rd resistance, the 4th electric capacity and the 4th resistance, and the 5th electric capacity, described the 3rd electric capacity is connected the centre cap of the secondary coil of the 3rd isolating transformer with branch road one end that the 3rd resistance series connection back forms, the other end is by the 5th capacity earth, described the 4th electric capacity is connected the centre cap of the secondary coil of the 4th isolating transformer with branch road one end that the 4th resistance series connection back forms, the other end is by the 5th capacity earth.
Further, the RJ45 connector in the described system also comprises:
Second electric capacity and second resistance, branch road one end that described second electric capacity and second resistance series connection back form is connected the power cathode of PSE, other end ground connection; And
First electric capacity and first resistance, branch road one end that described first electric capacity and first resistance series connection back form is connected the positive source of PSE, other end ground connection.
Further, the RJ45 connector in the described system also comprises: the 7th electric capacity is connected between the centre cap of secondary coil of described first isolating transformer and second isolating transformer.
RJ45 connector circuit that the utility model provides and Power over Ethernet system, can be in the cable-side of RJ45 connector, with dead pair and holding wire to disconnecting, when the high pressure that produces of can avoiding being struck by lightning is come in from the cable-side of RJ45 connector, with supply lines between electric capacity puncture, make that in the POE power supply process it is disconnected that PSE erroneous judgement can not occur to far-end PD load, can not influence the power supply of PSE meeting far-end PD load.
Description of drawings
Fig. 1 is the PoE system construction drawing;
Fig. 2 is the circuit diagram of RJ45 connector in the prior art;
Fig. 3 for supply lines when the RJ45 connector connects the PD load between the equivalent circuit diagram of resistance;
Fig. 4 is the circuit diagram of the RJ45 connector of the utility model embodiment one;
Fig. 5 is the circuit diagram of the RJ45 connector of the utility model embodiment two.
Embodiment
Based on existing RJ45 connector circuit, when adopting holding wire to (1,2 and 3,6) when powering, the high voltage that produces when thunderbolt is from dead pair (4,5 and 7,8) when coming in, can cause supply lines breakdown to the electric capacity between (just holding wire to), make in the PoE power supply process, it is disconnected that PSE erroneous judgement occurs to far-end PD load, influenced the power supply of PSE to far-end PD load.Therefore, whether load meets the IEEE802.3af standard and makes right judgement to far-end PD to make PSE, avoids erroneous judgement disconnected, also just need when the high voltage of thunderbolt generation when dead pair is come in, can not cause supply lines between the puncture of electric capacity.Therefore the utility model provides the circuit of two kinds of RJ45 connectors, having avoided high pressure that thunderbolt produces to the supply lines of RJ45 connector to the puncture of electric capacity, make that it is disconnected that PSE erroneous judgement can not occur to far-end PD load in the PoE power supply process.
Embodiment one
As shown in Figure 4, circuit structure diagram for the RJ45 connector of the utility model embodiment one, the difference of the circuit of the circuit of RJ45 connector of the present utility model and existing RJ45 connector (Fig. 2) is, in the circuit of existing RJ45 connector, holding wire is to being connected to capacitor C 5 ground connection of 1000pf/2KV respectively jointly with dead pair by filter circuit, the holding wire of the RJ45 connector circuit among the utility model embodiment is to being connected respectively to electric capacity and the ground connection of 1000pf/2KV respectively with dead pair by filter circuit.Wherein, filter circuit is made up of the electric capacity of a 0.022uF/250V and the resistance of a 75OHM.
As shown in Figure 4, the PCB SIDE end of RJ45 connector is connected with switch, wherein CH1+/--CH4+/-be connected with the signal of the correspondence of switch related chip, be used for transmission and receive data, the DC power supply of pin11, pin12 and switch is that PSE links to each other, and is used to realize the power supply of PSE to far-end PD load.The CABLE SIDE end of RJ45 connector is connected with PD equipment by Ethernet cable.Wherein, Ethernet cable comprises 8 twisted-pair feeders, and promptly 4 pairs of differential lines are right.The Power over Ethernet process is to utilize 2 couple of 4 pairs of differential lines centerings that PD is powered.As shown in Figure 4, the RJ45 connector comprises:
Isolating transformer T1/A, T2/A, T3/A, T4/A, wherein, the secondary coil output of T1/A and T2/A is respectively holding wire to (1,2) and (3,6), the secondary coil output of T3/A and T4/A is respectively dead pair (4,5) and (7,8), isolating transformer T1/A, T2/A, T3/A, T4/A, signal to RJ45 connector both sides can't harm transmission, the effect of playing filtering simultaneously and isolating the both sides signal;
Isolating transformer T5, in two coil one is connected between the centre cap of secondary coil of the positive source of power supply unit PSE and isolating transformer T1/A, another is connected between the centre cap of secondary coil of the power cathode of power supply unit PSE and isolating transformer T2/A, the both positive and negative polarity of PSE device power supply (DPS) just is coupled to the centre tap of isolating transformer T1/A, T2/A by isolating transformer T5 like this, centre tap power supply by to isolating transformer T1/A, T2/A applies voltage between two pairs of holding wires are to (1,2) (3,6).Holding wire is connected to PD equipment to (1,2) and (3,6), is used for the power devices to PD, and isolating transformer T5, can play the effect of isolating both sides signal and filtering;
Branch road one end that capacitor C 1 and resistance R 1 series connection back form is connected the centre cap of the secondary coil of isolating transformer T1/A, and the other end is by capacitor C 5 ground connection; Branch road one end that capacitor C 2 and resistance R 2 series connection backs form is connected the centre cap of the secondary coil of isolating transformer T2/A, and the other end is by capacitor C 5 ground connection;
Branch road one end that capacitor C 3 and resistance R 3 series connection backs form is connected the centre cap of the secondary coil of isolating transformer T3/A, and the other end is by capacitor C 6 ground connection; Branch road one end that capacitor C 4 and resistance R 4 series connection backs form is connected the centre cap of the secondary coil of isolating transformer T4/A, and the other end is by capacitor C 6 ground connection;
Wherein, C1, C2, C3, C4 are generally 0.022uF/250V, and R1, R2, R3, R4 are generally 75OHM, all are empirical values, do not limit their value in the utility model; Capacitor C 5, C6 are generally 1000pF/2000V, and withstand voltage is high more good more certainly, but the withstand voltage height, and cost is just big more.
Foregoing circuit also comprises capacitor C 7, is electrically connected between the centre cap of secondary coil of isolating transformer T1/A, T2/A, and the effect of capacitor C 7 is filtering.
Adopt above-mentioned RJ45 connector circuit, when adopting holding wire to (1,2) (3, when 6) powering, the high pressure that produces when being struck by lightning is from the dead pair (4 of RJ45 connector, 5) (7, when 8) coming in, when from dead pair (7, when 8) coming in, the path that electric current passes through is: electric current is come in from idle line 7 or 8, by withstand voltage is the capacitor C 4 of 250V, resistance R 4, withstand voltage is capacitor C 6 and the ground connection of 2KV, though C4 can be breakdown, but because do not pass through C1, C2, so C1, C2 does not puncture, just supply lines between electric capacity do not have breakdown, therefore in the PoE power supply process, it is disconnected that PSE erroneous judgement can not occur to far-end PD load, can not influence the PoE power supply process.
Equally, when adopting dead pair to power, the both positive and negative polarity of PSE device power supply (DPS) is coupled to the centre tap of isolating transformer T3/A, T4/A by isolating transformer T5, centre tap power supply by to isolating transformer T3/A, T4/A applies voltage between two pairs of dead pairs (4,5) and (7,8).Holding wire is connected to PD equipment to (4,5) and (7,8), is used for the power devices to PD.When high pressure from holding wire when coming in, can not puncture supply lines equally to the electric capacity between (dead pair just), therefore in the PoE power supply process, it is disconnected that PSE erroneous judgement can not occur to far-end PD load, can not influence the PoE power supply process.
Embodiment two
As shown in Figure 5, the RJ45 connector circuit that the utility model embodiment two provides, be with the difference of existing RJ45 connector, in the circuit of existing RJ45 connector, holding wire is connected to filter circuit and ground connection to the centre cap of the secondary coil by isolating transformer, and the centre cap of the secondary coil of isolating transformer also is connected to the both positive and negative polarity of PSE power supply unit power supply by isolating transformer, in the RJ45 connector circuit among the utility model embodiment, holding wire is to the centre cap of the secondary coil by isolating transformer just and be connected to the both positive and negative polarity of PSE power supply unit power supply through isolating transformer T5.
As shown in Figure 5, the PCB SIDE end of RJ45 connector is connected with switch, wherein CH1+/--CH4+/-be connected with the signal of the correspondence of switch related chip, be used for transmission and receive data, the DC power supply of pin11, pin12 and switch is that PSE links to each other, and is used to realize the power supply of PSE to far-end PD load.The CABLE SIDE end of RJ45 connector is connected with PD equipment by Ethernet cable.Wherein, Ethernet cable comprises 8 twisted-pair feeders, and promptly 4 pairs of differential lines are right.The Power over Ethernet process is to utilize 2 couple of 4 pairs of differential lines centerings that PD is powered.As shown in Figure 5, the RJ45 connector comprises:
Isolating transformer T1/A, T2/A, T3/A, T4/A, wherein, the secondary coil output of T1/A and T2/A is respectively holding wire to (1,2) and (3,6), the secondary coil output of T3/A and T4/A is respectively dead pair (4,5) and (7,8), isolating transformer T1/A, T2/A, T3/A, T4/A, signal to RJ45 connector both sides can't harm transmission, the effect of playing filtering simultaneously and isolating the both sides signal;
Isolating transformer T5, in two coil one is connected between the centre cap of secondary coil of the positive source of power supply unit PSE and isolating transformer T1/A, another is connected between the centre cap of secondary coil of the power cathode of power supply unit PSE and isolating transformer T2/A, the both positive and negative polarity of PSE device power supply (DPS) just is coupled to the centre tap of isolating transformer T1/A, T2/A by isolating transformer T5 like this, centre tap power supply by to isolating transformer T1/A, T2/A applies voltage between two pairs of holding wires are to (1,2) (3,6).Holding wire is connected to PD equipment to (1,2) and (3,6), is used for the power devices to PD, and isolating transformer T5, plays the effect of isolating both sides signal and filtering;
Branch road one end that capacitor C 3 and resistance R 3 series connection backs form is connected the centre cap of the secondary coil of isolating transformer T3/A, and the other end is by capacitor C 5 ground connection; Branch road one end that capacitor C 4 and resistance R 4 series connection backs form is connected the centre cap of the secondary coil of isolating transformer T4/A, and the other end is by capacitor C 5 ground connection.
Wherein, foregoing circuit also comprises capacitor C 7, is electrically connected between the centre cap of secondary coil of isolating transformer T1/A, T2/A, and the effect of capacitor C 7 is filtering.
Adopt above-mentioned RJ45 connector circuit, holding wire between do not have electric capacity and resistance, therefore, in the PoE power supply process, supply lines is exactly the resistance of far-end PD load itself to the resistance between (be holding wire to), therefore in the PoE power supply process, it is disconnected that PSE erroneous judgement can not occur to far-end PD load, can not influence the PoE power supply process.
Further, in above-mentioned RJ45 connector circuit, can also connect filter circuit and ground connection respectively at the power positive cathode of PSE power supply unit, so just can be to carrying out filtering by the right ethernet signal of holding wire, so the circuit of RJ45 connector also comprises:
Wherein, C1, C2, C3, C4 are generally 0.022uF/250V in foregoing circuit, and R1, R2, R3, R4 are generally 75OHM, all are empirical values, do not limit their value in the utility model; Capacitor C 5 is generally 1000pF/2000V, and withstand voltage is high more good more certainly, but the withstand voltage height, and cost is just big more.
Adopt the circuit of above-mentioned RJ45 connector, when adopting holding wire to (1,2) (3, when 6) powering, the high voltage that produces when being struck by lightning is from dead pair (4,5) (7, when 8) coming in, for example from dead pair (7,8) come in, the path that electric current is flowed through is: electric current is come in from idle line 7 or 8, the centre cap of the secondary coil by isolating transformer T4/A, and be the capacitor C 4 of 250V by withstand voltage, resistance R 4, be capacitor C 5 ground connection of 2KV through withstand voltage again, can be to supply lines to not exerting an influence, and supply lines between capacitor C 1, C2 can be not breakdown yet, therefore in the PoE power supply process, it is disconnected that PSE erroneous judgement can not occur to far-end PD load, can not influence the PoE power supply process.
The circuit diagram of the RJ45 connector that above-mentioned two embodiment just power to the load to PD by holding wire with PoE, as PoE when load is powered to PD by dead pair, the design philosophy of foregoing circuit is suitable equally.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (10)
1. RJ45 connector, comprise: first isolating transformer, second isolating transformer, the 3rd isolating transformer, the 4th isolating transformer, it is right that the secondary coil output of described first isolating transformer and second isolating transformer is respectively holding wire, the secondary coil output of described the 3rd isolating transformer and the 4th isolating transformer is respectively dead pair, it is characterized in that, also comprise:
The 5th isolating transformer, in two coil one is connected between the centre cap of secondary coil of the positive source of power supply unit PSE and first isolating transformer, and another is connected between the centre cap of secondary coil of the power cathode of power supply unit PSE and second isolating transformer;
First electric capacity and first resistance, second electric capacity and second resistance, and the 5th electric capacity, described first electric capacity is connected the centre cap of the secondary coil of first isolating transformer with branch road one end that first resistance series connection back forms, the other end is by the 5th capacity earth, described second electric capacity is connected the centre cap of the secondary coil of second isolating transformer with branch road one end that second resistance series connection back forms, the other end is by the 5th capacity earth;
The 3rd electric capacity and the 3rd resistance, the 4th electric capacity and the 4th resistance, and the 6th electric capacity, described the 3rd electric capacity is connected the centre cap of the secondary coil of the 3rd isolating transformer with branch road one end that the 3rd resistance series connection back forms, the other end is by the 6th capacity earth, described the 4th electric capacity is connected the centre cap of the secondary coil of the 4th isolating transformer with branch road one end that the 4th resistance series connection back forms, the other end is by the 6th capacity earth.
2. connector as claimed in claim 1 is characterized in that, also comprises:
The 7th electric capacity is connected between the centre cap of secondary coil of described first isolating transformer and second isolating transformer.
3. RJ45 connector, comprise: first isolating transformer, second isolating transformer, the 3rd isolating transformer, the 4th isolating transformer, it is right that the secondary coil output of described first isolating transformer and second isolating transformer is respectively holding wire, the secondary coil output of described the 3rd isolating transformer, the 4th isolating transformer is respectively dead pair, it is characterized in that, also comprise:
The 5th isolating transformer, in two coil one is connected between the centre cap of secondary coil of the positive source of power supply unit PSE and first isolating transformer, and another is connected between the centre cap of secondary coil of the power cathode of power supply unit PSE and second isolating transformer;
The 3rd electric capacity and the 3rd resistance, the 4th electric capacity and the 4th resistance, and the 5th electric capacity, described the 3rd electric capacity is connected the centre cap of the secondary coil of the 3rd isolating transformer with branch road one end that the 3rd resistance series connection back forms, the other end is by the 5th capacity earth, described the 4th electric capacity is connected the centre cap of the secondary coil of the 4th isolating transformer with branch road one end that the 4th resistance series connection back forms, the other end is by the 5th capacity earth.
4. connector as claimed in claim 3 is characterized in that, also comprises:
Second electric capacity and second resistance, branch road one end that described second electric capacity and second resistance series connection back form is connected the power cathode of PSE, other end ground connection; And
First electric capacity and first resistance, branch road one end that described first electric capacity and first resistance series connection back form is connected the positive source of PSE, other end ground connection.
5. connector as claimed in claim 3 is characterized in that, also comprises: the 7th electric capacity is connected between the centre cap of secondary coil of described first isolating transformer and second isolating transformer.
6. Power over Ethernet system, comprise power supply unit PSE, powered device PD and RJ45 connector, wherein, the RJ45 connector comprises: first isolating transformer, second isolating transformer, the 3rd isolating transformer, the 4th isolating transformer, it is right that the secondary coil output of described first isolating transformer and second isolating transformer is respectively holding wire, the secondary coil output of described the 3rd isolating transformer and the 4th isolating transformer is respectively dead pair, it is characterized in that described RJ45 connector also comprises:
The 5th isolating transformer, in two coil one is connected between the centre cap of secondary coil of the positive source of power supply unit PSE and first isolating transformer, and another is connected between the centre cap of secondary coil of the power cathode of power supply unit PSE and second isolating transformer;
First electric capacity and first resistance, second electric capacity and second resistance, and the 5th electric capacity, described first electric capacity is connected the centre cap of the secondary coil of first isolating transformer with branch road one end that first resistance series connection back forms, the other end is by the 5th capacity earth, described second electric capacity is connected the centre cap of the secondary coil of second isolating transformer with branch road one end that second resistance series connection back forms, the other end is by the 5th capacity earth;
The 3rd electric capacity and the 3rd resistance, the 4th electric capacity and the 4th resistance, and the 6th electric capacity, described the 3rd electric capacity is connected the centre cap of the secondary coil of the 3rd isolating transformer with branch road one end that the 3rd resistance series connection back forms, the other end is by the 6th capacity earth, described the 4th electric capacity is connected the centre cap of the secondary coil of the 4th isolating transformer with branch road one end that the 4th resistance series connection back forms, the other end is by the 6th capacity earth.
7. system as claimed in claim 6 is characterized in that, described RJ45 connector also comprises:
The 7th electric capacity is connected between the centre cap of secondary coil of described first isolating transformer and second isolating transformer.
8. Power over Ethernet system, comprise power supply unit PSE, powered device PD and RJ45 connector, wherein, the RJ45 connector comprises: first isolating transformer, second isolating transformer, the 3rd isolating transformer, the 4th isolating transformer, it is right that the secondary coil output of described first isolating transformer and second isolating transformer is respectively holding wire, the secondary coil output of described the 3rd isolating transformer and the 4th isolating transformer is respectively dead pair, it is characterized in that described RJ45 connector also comprises:
The 5th isolating transformer, in two coil one is connected between the centre cap of secondary coil of the positive source of power supply unit PSE and first isolating transformer, and another is connected between the centre cap of secondary coil of the power cathode of power supply unit PSE and second isolating transformer;
The 3rd electric capacity and the 3rd resistance, the 4th electric capacity and the 4th resistance, and the 5th electric capacity, described the 3rd electric capacity is connected the centre cap of the secondary coil of the 3rd isolating transformer with branch road one end that the 3rd resistance series connection back forms, the other end is by the 5th capacity earth, described the 4th electric capacity is connected the centre cap of the secondary coil of the 4th isolating transformer with branch road one end that the 4th resistance series connection back forms, the other end is by the 5th capacity earth.
9. system as claimed in claim 8 is characterized in that, described RJ45 connector also comprises:
Second electric capacity and second resistance, branch road one end that described second electric capacity and second resistance series connection back form is connected the power cathode of PSE, other end ground connection; And
First electric capacity and first resistance, branch road one end that described first electric capacity and first resistance series connection back form is connected the positive source of PSE, other end ground connection.
10. system as claimed in claim 8 is characterized in that, described RJ45 connector also comprises: the 7th electric capacity is connected between the centre cap of secondary coil of described first isolating transformer and second isolating transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201380344U CN201629463U (en) | 2010-03-19 | 2010-03-19 | RJ45 connector and Ethernet power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201380344U CN201629463U (en) | 2010-03-19 | 2010-03-19 | RJ45 connector and Ethernet power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201629463U true CN201629463U (en) | 2010-11-10 |
Family
ID=43060861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201380344U Expired - Fee Related CN201629463U (en) | 2010-03-19 | 2010-03-19 | RJ45 connector and Ethernet power supply system |
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| Country | Link |
|---|---|
| CN (1) | CN201629463U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710425A (en) * | 2011-03-28 | 2012-10-03 | 启碁科技股份有限公司 | Ethernet power relay system, feeder device and access bridging device |
| CN104852221A (en) * | 2014-02-19 | 2015-08-19 | 富士康(昆山)电脑接插件有限公司 | Network electric connector |
| CN106374306A (en) * | 2016-08-26 | 2017-02-01 | 浙江大华技术股份有限公司 | Passive coaxial network converter and power over Ethernet system |
| CN107294733A (en) * | 2017-07-14 | 2017-10-24 | 博为科技有限公司 | A kind of POE isolating device |
| CN107332675A (en) * | 2017-07-31 | 2017-11-07 | 博为科技有限公司 | PoE equipment without network transformer |
| US11201442B2 (en) | 2016-08-26 | 2021-12-14 | Zhejiang Dahua Technology Co., Ltd. | Power over ethernet system, device, and method |
| EP4601192A1 (en) * | 2024-02-06 | 2025-08-13 | Rockwell Automation Technologies, Inc. | Common mode termination matching method for digital communications |
-
2010
- 2010-03-19 CN CN2010201380344U patent/CN201629463U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710425A (en) * | 2011-03-28 | 2012-10-03 | 启碁科技股份有限公司 | Ethernet power relay system, feeder device and access bridging device |
| CN102710425B (en) * | 2011-03-28 | 2015-03-04 | 启碁科技股份有限公司 | Ethernet power relay system, feeder device and access bridging device |
| CN104852221A (en) * | 2014-02-19 | 2015-08-19 | 富士康(昆山)电脑接插件有限公司 | Network electric connector |
| CN106374306A (en) * | 2016-08-26 | 2017-02-01 | 浙江大华技术股份有限公司 | Passive coaxial network converter and power over Ethernet system |
| CN106374306B (en) * | 2016-08-26 | 2019-02-12 | 浙江大华技术股份有限公司 | A kind of passive coaxial network converter and Power over Ethernet system |
| US11201442B2 (en) | 2016-08-26 | 2021-12-14 | Zhejiang Dahua Technology Co., Ltd. | Power over ethernet system, device, and method |
| CN107294733A (en) * | 2017-07-14 | 2017-10-24 | 博为科技有限公司 | A kind of POE isolating device |
| CN107294733B (en) * | 2017-07-14 | 2023-05-02 | 博为科技有限公司 | Power over Ethernet isolation device |
| CN107332675A (en) * | 2017-07-31 | 2017-11-07 | 博为科技有限公司 | PoE equipment without network transformer |
| EP4601192A1 (en) * | 2024-02-06 | 2025-08-13 | Rockwell Automation Technologies, Inc. | Common mode termination matching method for digital communications |
| US12413215B2 (en) | 2024-02-06 | 2025-09-09 | Rockwell Automation Technologies, Inc. | Common mode termination matching method for digital communications |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20140319 |