CN107658861A - A kind of anti-POE power supplies misplug the protection circuit and method pulled out - Google Patents
A kind of anti-POE power supplies misplug the protection circuit and method pulled out Download PDFInfo
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- CN107658861A CN107658861A CN201710984677.7A CN201710984677A CN107658861A CN 107658861 A CN107658861 A CN 107658861A CN 201710984677 A CN201710984677 A CN 201710984677A CN 107658861 A CN107658861 A CN 107658861A
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- 230000005540 biological transmission Effects 0.000 description 18
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- 210000005069 ears Anatomy 0.000 description 6
- 208000033999 Device damage Diseases 0.000 description 4
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- 238000010992 reflux Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/006—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage
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Abstract
The protection circuit and method pulled out are mispluged the invention discloses a kind of anti-POE power supplies; damaged to terminal device caused by high voltage and current caused by preventing from POE power supplies from mispluging pulling out; when POE power supplies end equipment is connected by the data transfer pin in the interfaces of RJ 45 with electronic equipment; wherein; the rated voltage of the electronic equipment is less than the supply voltage of POE power supply end equipments, and the protection circuit includes：First diode；Second diode, the positive pole of second diode are connected with the negative pole of first diode, and the negative pole of second diode is connected with the positive pole of first diode, form the first parallel-connection structure；First parallel-connection structure is arranged between the interfaces of RJ 45 and electronic equipment connection, one end of first parallel-connection structure is connected by the interfaces of RJ 45 with the positive voltage pin of POE power supply end equipments, and the other end is connected by the interfaces of RJ 45 with the negative voltage pin of POE power supply end equipments.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of anti-POE power supplies to misplug the protection circuit and method pulled out.
Background technology
With the fast development of POE (Power Over Ethernet, active Ethernet) power supply technique, more and more
Equipment uses this power supply mode, this mode in the case where existing Ethernet wiring architecture is without any changes,
Reach while be transmitted data with terminal device, also provide direct current supply for terminal device, simplify wiring, save into
This, is easy to remote management, safe ready.However, because POE power supply interfaces use Ethernet RJ-45 interfaces, if terminal device goes out
The RJ-45 Ethernet interfaces for being only used for data transfer of existing identical appearance structure, even if being subject to the interface with identical appearance
Mark is distinguished, and also occurs mispluging the possibility pulled out unavoidably, for example RGPS (Remote Global Positioning System, is drawn
Remote global positioning system) the Ethernet RJ-45 interfaces that use, its outward appearance and POE RJ-45 interfaces of powering are identical, but standard POE
Supply voltage is higher, and the damage of terminal device can be caused by being mistakenly inserted big voltage caused by RGPS Ethernet RJ-45 interfaces and electric current,
Property loss is directly contributed, some equipment reprocess that cost is too high to be caused to discard.It can be seen that it is such a misplug pull out bring it is direct with it is indirect
Loss should not be underestimated, and be urgent problem instantly.
The content of the invention
The present invention provides a kind of anti-POE power supplies and misplugs the protection circuit and method pulled out, and is pulled out to solve to misplug with POE power supplies
The problem of caused high voltage and current causes terminal device to damage.
The protection circuit pulled out is mispluged the embodiments of the invention provide a kind of anti-POE power supplies, for leading to when POE power supplies end equipment
When the data transfer pin crossed in RJ-45 interfaces is connected with electronic equipment, wherein, the rated voltage of the electronic equipment is less than institute
The supply voltage of POE power supply end equipments is stated, including：
First diode；
Second diode, the positive pole of second diode are connected with the negative pole of first diode, and the described 2nd 2
The negative pole of pole pipe is connected with the positive pole of first diode, forms the first parallel-connection structure；First parallel-connection structure is arranged on
Between the RJ-45 interfaces and electronic equipment connection, one end of first parallel-connection structure by the RJ-45 interfaces with
The positive voltage pin connection of the POE power supplies end equipment, the other end pass through the RJ-45 interfaces and POE power supply end equipments
Negative voltage pin connection.
Optionally, a pin in RJ-45 interfaces is connected with power supply, and the protection circuit and method also include：
3rd diode, the 3rd diode are connected between the RJ-45 interfaces and the power supply, wherein described
The positive pole of three diodes is connected with the power supply, and negative pole is connected with one pin in the RJ-45 interfaces.
Optionally, first diode, second diode, the 3rd diode are Schottky diode.
The embodiment of the present invention additionally provides a kind of base station, and the base station includes RJ-45 interfaces and electronic equipment, when POE powers
When end equipment is connected by RJ-45 interfaces with the electronic equipment, wherein, the rated voltage of the electronic equipment is less than described
The supply voltage of POE power supply end equipments, the base station also includes：
The electric capacity being arranged between the RJ-45 interfaces and the electronic equipment, the electric capacity pass through RJ-45 interfaces and institute
State positive voltage pin or the connection of negative voltage pin of POE power supply end equipments.
Optionally, the electric capacity is paster Leaded Ceramic Disc Capacitor.
Optionally, the capacitance of the electric capacity is 0.1 μ F or 1 μ F.
Optionally, the base station also includes：
4th diode；
5th diode, the positive pole of the 5th diode are connected with the negative pole of the 4th diode, and the described 5th 2
The negative pole of pole pipe is connected with the positive pole of the 4th diode, forms the second parallel-connection structure；Second parallel-connection structure is arranged on
Between the RJ-45 interfaces and electronic equipment connection, one end of second parallel-connection structure by the RJ-45 interfaces with
The positive voltage pin connection of the POE power supplies end equipment, the other end pass through the RJ-45 interfaces and the POE feeder ears
The negative voltage pin connection of equipment.
Optionally, a pin in RJ-45 interfaces is connected with power supply, and the base station also includes：
6th diode, the 6th diode are connected between the RJ-45 interfaces and the power supply, wherein described
The positive pole of six diodes is connected with the power supply, and negative pole is connected with one pin in the RJ-45 interfaces.
Optionally, the 4th diode, the 5th diode, the 6th diode are Schottky diode.
The embodiment of the present invention additionally provides a kind of anti-POE power supplies and misplugs draw out method, and this method is applied to anti-POE power supplies and mispluged
In the protection circuit pulled out, the protection circuit includes at least one diode, and methods described includes：
When it is determined that POE power supplies end equipment is connected by the data transfer pin in RJ-45 interfaces with electronic equipment, control
The electric current of the positive voltage pin output of POE power supply end equipment flows through RJ-45 interfaces at least one diode, its
In, the rated voltage of the electronic equipment is less than the supply voltage of POE power supply end equipments；
The electric current of at least one diode output is controlled to flow through the RJ-45 interfaces to POE power supply end equipments
Negative voltage pin so that the electric current that POE power supply end equipment is output to the electronic equipment is less than predetermined threshold value.
The embodiment of the present invention additionally provides a kind of anti-POE power supplies and misplugs draw out method, and this method is applied to anti-POE power supplies and mispluged
In the protection circuit pulled out, the protection circuit includes electric capacity, and methods described includes：
When it is determined that POE power supplies end equipment is connected by the data transfer pin in RJ-45 interfaces with electronic equipment, control
The electric current of the POE power supplies end equipment output flows through the electric capacity so that the POE power supplies end equipment is output to the electronics and set
Standby electric current is less than predetermined threshold value, wherein, the rated voltage of the electronic equipment is less than the power supply electricity of POE power supply end equipments
Pressure.
The present invention has the beneficial effect that：
Protection circuit and method in the present invention make positive pressure side current reflux to negative pressure end by diode, reduce because
POE power supplies misplug pull out caused by device damage, the base station in the present invention by electric capacity, stop high DC (Direct current, directly
Stream electricity) voltage, avoid high voltage and current and be circulated into base station equipment, protect base station equipment against damages.The present invention does not adopt
With the higher device of isolation 485/422 of cost, cost is cheap, significant effect, considerably increases the competitiveness of product.And this
The anti-POE of invention design misplug protection circuit and method and architecture of base station compared with it is simple, circuit devcie is few, cost is low, is easily achieved,
The occasion that protection is mispluged in the anti-POE of RJ-45 interfaces can be applied, and original circuit signal will not be impacted.
Brief description of the drawings
Fig. 1 a are that a kind of anti-POE power supplies that the embodiment of the present invention one provides misplug the protection circuit figure pulled out；
Fig. 1 b are that a kind of anti-POE power supplies misplug the protection circuit figure pulled out corresponding to Fig. 1 a in the embodiment of the present invention one；
Fig. 1 c are that a kind of anti-POE power supplies that the embodiment of the present invention one provides misplug the protection circuit pulled out and method figure；
Fig. 1 d are that a kind of anti-POE power supplies misplug the protection circuit figure pulled out corresponding to Fig. 1 c in the embodiment of the present invention one；
Fig. 2 a are that a kind of anti-POE power supplies provided in the embodiment of the present invention two misplug the protection circuit figure pulled out；
Fig. 2 b are that a kind of anti-POE power supplies misplug the protection circuit figure pulled out corresponding to Fig. 2 a in the embodiment of the present invention two；
Fig. 3 a are that a kind of anti-POE power supplies provided in the embodiment of the present invention three misplug the protection circuit figure pulled out；
Fig. 3 b are that a kind of anti-POE power supplies misplug the protection circuit figure pulled out corresponding to Fig. 3 a in the embodiment of the present invention three；
Fig. 4 is that a kind of anti-POE power supplies provided in the embodiment of the present invention four misplug the protection circuit figure pulled out；
Fig. 5 is that a kind of anti-POE power supplies provided in the embodiment of the present invention five misplug the protection circuit figure pulled out；
Fig. 6 is that a kind of anti-POE power supplies provided in the embodiment of the present invention six misplug the schematic flow sheet of draw out method.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, anti-POE in the embodiment of the present invention is mispluged and pulls out the technical scheme of protection circuit and method and is clearly and completely retouched
State, it is clear that described embodiment is part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
The present invention provides a kind of anti-POE power supply and misplugs the protection circuit and method pulled out, and misplugs solving POE power supplies and pulls out production
The problem of raw high voltage and current causes terminal device to damage.
In order to solve the above technical problems, the general thought of the technical scheme in the embodiment of the present invention is as follows：When POE feeder ears
Equipment is connected by the data transfer pin in RJ-45 interfaces with electronic equipment, wherein, the rated voltage of the electronic equipment is small
In the supply voltage of POE power supply end equipments, diode is set to make the current reflux of positive pressure side to negative pressure end and/or electricity is set
Hold and block high voltage and current.
Embodiment one
As shown in Figure 1a, the embodiment of the present invention provides a kind of anti-POE power supplies and misplugs the protection circuit pulled out, when POE feeder ears
Equipment is connected by the data transfer pin in RJ-45 interfaces 11 with electronic equipment 12, wherein, the electronic equipment 12 it is specified
Voltage is less than the supply voltage of POE power supply end equipments, and the protection circuit includes：
First diode D1；
Second diode D2, the positive pole of the second diode D2 is connected with the negative pole of the first diode D1, described
Second diode D2 negative pole is connected with the positive pole of the first diode D1, forms parallel-connection structure；The parallel-connection structure is set
Between the RJ-45 interfaces 11 and the electronic equipment 12 connect, one end of the parallel-connection structure passes through the RJ-45 interfaces
11 are connected with the positive voltage pin of POE power supply end equipments, and the other end is powered by the RJ-45 interfaces 11 and the POE
The negative voltage pin connection of end equipment.
It follows that the POE power supply end equipments both ends generating positive and negative voltage has following two situations：
The first situation, when the POE powers end equipment both ends generating positive and negative voltage as shown in Figure 1a, the POE feeder ears are set
The electric current of standby positive voltage pin is back to the negative voltage pin of the POE power supplies end equipment by the first diode D1, effectively keeps away
Exempt from high voltage and current and flowed into electronic equipment 12, reduce damage of the high voltage and current to electronic equipment 12.
Specifically, as shown in Figure 1 b, end equipment is powered as interchanger 110 using POE, electronic equipment is common RS-422/485
Transceiver 111, interchanger 110 pass through two data transfer pins in RJ-45 interfaces 112 and common RS-422/485 transceivers
111 connections, interchanger 110 is mistakenly inserted exemplified by RGPS Ethernet RJ-45 interfaces 112, based on Fig. 1 a, diode D11 and D13
Form parallel-connection structure, the effect of diode D12 and diode D14 composition parallel-connection structure, wherein diode D11 and diode D12
Identical with the diode D1 in Fig. 1 a, diode D13 and diode D14 effect are identical with the diode D2 in Fig. 1 a.
In Fig. 1 b, the line sequence of the power supply interface of interchanger 110 is pin 1, pin 2 connects positive voltage and (represented in figure with "+"
Positive voltage), pin 3, pin 6 connect negative voltage (representing negative voltage with "-" in figure), and pin 4, pin 5, pin 7, pin 8 is without electricity
Piezoelectricity streaming (represents that no-voltage electric current transmits) in figure with NC, the signal of transmission for PPS (Pulse Per Second, it is per second
Umber of pulse) signal, the pins 1 of RGPS Ethernet RJ-45 interfaces 112 connects power supply VCC, and pin 2 meets GND, and interchanger 110 draws
Pin 1 and pin 2 connect identical positive voltage, equivalent to VCC and GND short circuits.
If the interface of the interchanger 110 is mistakenly inserted RGPS Ethernet RJ-45 interfaces 112, now, the interface of interchanger 110 by
Become positive voltage in being mistakenly inserted the GND that makes RJ-45 interfaces 112, due to diode D11, diode D12 positive pole meets GND, then
Diode D11, diode D12 just extremely positive voltage, and diode D11, diode D12 negative pole connection interchanger 110 connect
The pin 3 of mouth, pin 6, i.e. diode D11, diode D12 negative pole is negative voltage, then diode D11, diode D12 two
There is a pressure drop at end, diode D11, diode D12 conducting, high voltage and current from the pin 2 of interchanger 110 by diode D11, two
Pole pipe D12 flows to the pin 3 of RGPS Ethernet RJ-45 interfaces 112, pin 6, and then the negative voltage for being back to interchanger 110 draws
Pin 3, negative voltage pin 6, i.e. high voltage and current have been back to the negative voltage of interchanger 110 from the positive voltage pin of interchanger 110
Pin, the influence to common RS-422/485 transceivers 111 is weakened, common RS-422/485 transceivers 111 will not be damaged.
Second of situation, when the POE powers end equipment both ends generating positive and negative voltage as illustrated in figure 1 c, the POE feeder ears are set
The electric current of standby positive voltage pin is back to the negative voltage pin of the POE power supplies end equipment by the second diode D2, effectively keeps away
Exempt from high voltage and current and flowed into electronic equipment 12, reduce damage of the high voltage and current to electronic equipment 12.
Specifically, as shown in Figure 1 d, end equipment is powered as interchanger 110 using POE, electronic equipment is common RS-422/485
Transceiver 111, interchanger 110 pass through two data transfer pins in RJ-45 interfaces 112 and common RS-422/485 transceivers
111 connections, interchanger 110 is mistakenly inserted exemplified by RGPS Ethernet RJ-45 interfaces 112, based on Fig. 1 c, diode D11 and two
Pole pipe D13 forms parallel-connection structure, diode D12 and diode D14 composition parallel-connection structures, wherein diode D11 and diode D12
Effect it is identical with the diode D1 in Fig. 1 c, diode D13 and diode D14 effect and the diode D2 phases in Fig. 1 c
Together.
In Fig. 1 d, the line sequence of the power supply interface of interchanger 110 is pin 1, pin 2 connects negative voltage, and pin 3, pin 6 connect
Positive voltage, pin 4, pin 5, pin 7, the transmission of the no-voltage electric current of pin 8, the signal of transmission are PPS signal, RGPS Ethernets
The pin 1 of RJ-45 interfaces 112 connects power supply VCC, and pin 2 meets GND, and pin 1 and pin 2 the connection identical of interchanger 110 are born
Voltage, equivalent to VCC and GND short circuits.
If the interface of the interchanger 110 is mistakenly inserted RGPS Ethernet RJ-45 interfaces 112, now, the interface of interchanger 110 by
Become negative voltage, and diode D13 in being mistakenly inserted the VCC that makes RJ-45 interfaces 112, diode D14 negative pole meets VCC, i.e., two
Pole pipe D13, diode D14 negative pole are negative voltage, and diode D13, diode D14 positive pole connect drawing for exchange interface
Pin 3, pin 6, i.e. diode D13, diode D14 just extremely positive voltage, then there is pressure at diode D13, diode D14 both ends
Drop, diode D13, diode D14 conducting, high voltage and current from the pin 3 of interchanger 110, pin 6 by diode D13, the
Four diode D14 are back to the pin 1 of RGPS Ethernet RJ-45 interfaces 112, pin 2, and then are back to drawing for interchanger 110
Pin 1, i.e. high voltage and current have been back to negative voltage pin from the positive voltage pin of interchanger, weaken to common RS-422/485
The influence of transceiver 111, common RS-422/485 transceivers 111 will not be damaged.
What deserves to be explained is the present invention in POE power supply end equipment can be PSE (Power Sourcing Equipment,
Power end equipment) adapter or CP (Convergence Part, converging replacement part) or interchanger, the present invention it is right
Specific POE feeder ear device types are not restricted.Likewise, electronic equipment can be that common RS-422/485 is received in the present invention
Device is sent out, can be weak current equipment, but the type of specific electronic equipment is not restricted, as long as the electronic equipment does not apply to standard
The high voltage that POE power supplies provide.
Also, in embodiment one as shown in fig. 1b and fig. lc, POE power supplies end equipment passes through two numbers in RJ-45 interfaces
Being connected according to transmission pin with electronic equipment, i.e. POE power supplies end equipment is connected by two data transmission lines with electronic equipment, but this
Invention is not limited in the protection of two data transmission lines, and those skilled in the art, can be as needed when implementing the program
The solution of the present invention is used for the protection of one or two data above transmission line.
Embodiment two
As shown in Figure 2 a, embodiment two is on the basis of embodiment one, when a pin in RJ-45 interfaces (such as is schemed
The pin 1 of RGPS Ethernets RJ-45 interfaces 123 in 2b) it is connected with power supply, the protection circuit and method also include：
3rd diode D3, the 3rd diode D3 are connected between the RJ-45 interfaces 21 and the power supply 23, its
Described in the 3rd diode D3 positive pole be connected with the power supply 23, negative pole draws with one in the RJ-45 interfaces 21
Pin connects.
Specifically, as shown in Figure 2 b, end equipment is powered as interchanger 120 using POE, electronic equipment is common RS-422/485
Transceiver 121 and common RS-422/485 transceivers 122, interchanger 120 pass through four data transfers in RJ-45 interfaces 123
Pin is connected with common RS-422/485 transceivers 121 and common RS-422/485 transceivers 122, and the interface of interchanger 110 misses
Insert exemplified by RGPS Ethernet RJ-45 interfaces 123, diode D25 effect is identical with the diode D3 in Fig. 2 a.
In Fig. 2 b, the line sequence of the power supply interface of interchanger 120 is pin 1, pin 2, pin 4, pin 5 connect positive voltage,
Pin 3, pin 6, pin 7, pin 8 connect negative voltage, and the signal of transmission (receive, receives) signal for PPS signal and RX,
The pin 1 of RGPS Ethernet RJ-45 interfaces 112 connects VCC1, and pin 2 meets GND, and the pin 1 and pin 2 of interchanger 120 connect
Identical positive voltage, equivalent to VCC1 and GND short circuits.
If the interface of the interchanger 110 is mistakenly inserted RGPS Ethernet RJ-45 interfaces 123, now, the interface of interchanger 120 by
Become positive voltage in being mistakenly inserted the GND that makes RJ-45 interfaces 123, due to diode D21, diode D22 positive pole meets GND, then
Diode D21, diode D22 just extremely positive voltage, and diode D21, diode D22 negative pole connect interchanger and connect respectively
The pin 3 of mouth, pin 6, i.e. diode D21, diode D22 negative pole is negative voltage, then diode D21, diode D22 two
There is a pressure drop at end, diode D21, diode D22 conducting, high voltage and current from the pin 2 of interchanger 120 by diode D21, two
Pole pipe D22 is back to the pin 3 of RGPS Ethernet RJ-45 interfaces 123, pin 6, and then is back to the pin 3 of interchanger 120,
Pin 6, i.e. high voltage and current have been back to negative voltage pin from the positive voltage pin of interchanger 120, weaken to common RS-
The influence of 422/485 transceiver 121, common RS-422/485 transceivers 121 will not be damaged.
Similarly, the high voltage and current that diode D23, diode D24 are introduced into common RS-422/485 transceivers 122 returns
Flow to the pin 7 of interchanger 120, pin 8.
Also, to prevent over-voltage breakdown PMOS control circuits, increase diode D25, utilize diode D25 unilateal conduction
Property prevent electronic equipment because overvoltage burn out.
Further, since the inside pin 1 of interchanger 120, pin 2 and pin 4, pin 5 connect together, i.e. RGPS Ethernets
The pin 4 of RJ-45 interfaces 123, the positive voltage of pin 5 are also by diode D21, diode D22, diode D23, diode
D24 has been back to the negative voltage pin of interchanger 120, weakens the influence to common RS-422/485 transceivers 122, then by mistake
Insertion would not damage common RS-422/485 transceivers 122.
Optionally, the first diode, the second diode, the 3rd diode are Schottky diode.Because standard POE powers
The voltage of offer is higher, so used diode is preferably the big Schottky diode of pressure voltage in the present invention, still
Those skilled in the art can select other kinds of diode as needed during specific implementation, as long as used two
Pole pipe is resistant to the high voltage that standard POE power supplies provide.
Embodiment three
The embodiments of the invention provide a kind of base station, and as shown in Figure 3 a, the base station includes RJ-45 interfaces 31 and electronic equipment
32, when POE power supplies end equipment 33 is connected by RJ-45 interfaces 31 with electronic equipment 32, wherein, the volume of the electronic equipment 32
Determine supply voltage of the voltage less than POE power supply end equipments 33, the base station also includes：
The electric capacity 34 being arranged between the RJ-45 interfaces 31 and the electronic equipment 32, the electric capacity 34 pass through RJ-45
Interface 31 is connected with the positive voltage pin or negative voltage pin of POE power supply end equipments 33.
Specifically, as shown in Figure 3 b, end equipment is powered as interchanger 301 using POE, electronic equipment is common RS-422/485
Transceiver 302 and common RS-422/485 transceivers 303, interchanger 301 pass through four data transfers in RJ-45 interfaces 304
Pin is connected with common RS-422/485 transceivers 302 and common RS-422/485 transceivers 303, and the interface of interchanger 301 misses
Insert exemplified by RGPS Ethernet RJ-45 interfaces 304, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 effect and the electricity in Fig. 3 a
It is identical to hold 34.
As shown in Figure 3 b, the line sequence of the power supply interface of interchanger 301 is pin 4, and pin 5 connects positive voltage；Pin 7, pin 8
Connect negative voltage；Pin 1, pin 2, pin 3, the transmission of the non-transformer voltage of pin 6, the signal of transmission (transmit, are sent) for TX
Signal and RX (receive, receiving) lead to if the interface of the signal interchanger 301 is mistakenly inserted RGPS Ethernet RJ-45 interfaces 304
Setting electric capacity C1, electric capacity C2, electric capacity C3 are crossed, electric capacity C4 blocks the high D/C voltage electric current of interchanger 301, and then avoids RS-422/
485 transceivers 302 and RS-422/485 transceivers 303 are impaired.
Also, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 are respectively in TX+ signals, TX- signals, RX+ signals, RX- signals
In transmission data wire, the transceiving data of RS-422/485 transceivers 302 and RS-422/485 transceivers 303, i.e. CPU are not influenceed
(Central Processing Unit, central processing unit) can normally read and write the data of Ethernet RJ-45 interfaces 304, normally
Interacted with RGPS module datas, and send GPS (Global Positioning System, global positioning system) pattern
Control and relevant control instruction, i.e. electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 presence do not interfere with RS-422/485 transmitting-receivings
Device 302 and the transceiving data of RS-422/485 transceivers 303.
Optionally, the electric capacity is paster magnetizing mediums electric capacity.Paster magnetizing mediums electric capacity small volume, resistance is small, for PCB
The wiring influence of (Printed Circuit Board, printed circuit board) space is small, so being preferably that paster magnetic is situated between in this programme
Matter electric capacity.
Optionally, the capacitance of the electric capacity is 0.1 μ F or 1 μ F.The capacitance of electric capacity used can be according to transmission number in the present invention
Selected according to the signal frequency on line, such as when the signal frequency in transmission data wire is smaller, select the larger electricity of capacitance
Hold.
Example IV
The embodiments of the invention provide a kind of base station, and on the basis of embodiment three, the base station also includes：
First diode；
Second diode, the positive pole of second diode are connected with the negative pole of first diode, and the described 2nd 2
The negative pole of pole pipe is connected with the positive pole of first diode, forms parallel-connection structure；The parallel-connection structure is arranged on the RJ-45
Between interface and electronic equipment connection, one end of the parallel-connection structure passes through the RJ-45 interfaces and the POE feeder ears
The positive voltage pin connection of equipment, the other end pass through the RJ-45 interfaces and the negative electricity of POE power supply end equipments
Press pin connection.
Specifically, as shown in figure 4, end equipment is powered as interchanger 410 using POE, electronic equipment is common RS-422/485
Transceiver 411 and RS-422/485 transceivers 412, interchanger 410 pass through six data transfer pins in RJ-45 interfaces 413
It is connected with common RS-422/485 transceivers 411 and RS-422/485 transceivers 412, the interface of interchanger 420 is mistakenly inserted RGPS
Exemplified by Ethernet RJ-45 interfaces 413, diode D41, diode D42, diode D43, diode D44 effect and above-mentioned the
One diode is identical, diode D45, diode D46, diode D47, diode D48 effect and above-mentioned second diode phase
Together.
As shown in figure 4, the line sequence of the power supply interface of interchanger 410 is pin 1, pin 2, pin 4, pin 5 are negative voltage,
Pin 3, pin 6, pin 7, pin 8 are positive voltage, and the pin 1 of RGPS Ethernet RJ-45 interfaces 413 connects power supply VCC, pin
2 connect GND, pin 1 and pin 2 the connection identical negative voltage of interchanger 410, equivalent to VCC and GND short circuits.
If the interface of the interchanger 420 is mistakenly inserted RGPS Ethernet RJ-45 interfaces 410, now, the interface of interchanger 410 by
Become negative voltage in being mistakenly inserted the VCC that makes RJ-45 interfaces 413, diode D41, diode D42 negative pole meet VCC, i.e. two poles
Pipe D41, diode D42 negative pole are negative voltage, and diode D41, diode D42 positive pole connect interchanger 410 and connect respectively
Mouthful 3,6 pin, i.e. diode D41, diode D42 just extremely positive voltage, then there is pressure at diode D41, diode D42 both ends
Drop, diode D41, diode D42 conducting, high voltage and current is from the pin 3 of interchanger 410, and pin 6 is by diode D41, and two
Pole pipe D42 is back to the pin 1 of RGPS Ethernet RJ-45 interfaces 413, and then is back to the pin 1 of interchanger 410, i.e., high electricity
Current voltage has been back to negative voltage pin from the positive voltage pin of interchanger 410, weakens to RS-422/485 transceivers 411
Influence, RS-422/485 transceivers 411 will not be damaged.
Similarly, the high voltage and current that diode D43, diode D44 are introduced into common RS-422/485 transceivers 412 returns
The negative voltage pin of interchanger 420 is flowed to, weakens the influence to RS-422/485 transceivers 412, then being mistakenly inserted would not
Damage RS-422/485 transceivers 412.
Meanwhile by setting electric capacity C41, electric capacity C42, electric capacity C43, electric capacity C44, the high DC of interchanger 410 can be blocked
Voltage x current, and then avoid RS-422/485 transceivers 412 impaired.
Also, when RGPS Ethernet RJ-45 interface normal works, because power supply VCC voltage is higher than signal transmission number
According to the voltage on line, i.e. RX+ signals, RX- signals, PPS+ signals, the voltage on PPS- signal transmitted data lines.Power supply VCC's
Voltage is less than diode D41, diode D42, diode D43, diode D44 breakdown voltage, thus can clamper, enter without
The normal work of influence system, it can also take precautions against to misplug and pull out caused device damage.
High voltage and current is back to by negative voltage from the positive voltage pin of interchanger 410 by diode in the present embodiment four
Pin and high D/C voltage electric current is blocked by electric capacity, efficiently avoid RS-422/485 transceivers caused by high voltage and current
Device damage.
Embodiment five
The embodiments of the invention provide a kind of base station, on the basis of example IV, a pin in RJ-45 interfaces
The pin 1 of RGPS Ethernets RJ-45 interfaces 513 (such as in Fig. 5) is connected with power supply, and the base station also includes：
3rd diode, the 3rd diode are connected between the RJ-45 interfaces and the power supply, wherein described
The positive pole of three diodes is connected with the power supply, and negative pole is connected with one pin in the RJ-45 interfaces.
Specifically, as shown in figure 5, interchanger 510 is by six data transfer pins in RJ-45 interfaces 513 and commonly
RS-422/485 transceivers 511 and RS-422/485 transceivers 512 connect, and on the basis of Fig. 4, Fig. 5 adds two poles
Pipe D59, diode D59 effect is identical with above-mentioned 3rd diode, has blocked the high voltage and current of interchanger 510 to pass through
The pin 1 of RJ-45 interfaces 513 is incorporated into base station equipment, protects base station equipment.Anti- POE power supplies as shown in Figure 5, which misplug, pulls out electricity
Road, diode and electric capacity are combined, the high voltage and current of the positive voltage pin of interchanger 510 can be back to by diode negative
Voltage pin, it can directly block high voltage and current to flow into RS-422/485 transceivers 512 by electric capacity, a variety of feelings can be protected
Mispluging for shape is pulled out：
1st, when the line sequence of the power supply interface of interchanger 510 is pin 1, pin 2, pin 4, pin 5 connect positive voltage, pin 3, draw
Pin 6, pin 7, pin 8 connect negative voltage, and the high voltage and current of the positive voltage pin of interchanger 510 passes through diode D55, diode
D56, diode D57, diode D58 are back to negative voltage pin, prevent high voltage and current to flow into RS-422/485 transceivers
511 and RS-422/485 transceivers 512.
2nd, when the line sequence of power supply for exchange interface connects positive voltage for pin 1, pin 2, pin 3, pin 6 connect negative voltage, drawn
Pin 4, pin 5, pin 7, the transmission of the no-voltage electric current of pin 8, the high voltage and current of the positive voltage pin of interchanger 510 pass through diode
D55, diode D56 are back to negative voltage pin, prevent high voltage and current to flow into RS-422/485 transceivers 511, avoid
The device damage caused by POE power supplies are mispluged and pulled out.
3rd, when the line sequence of power supply for exchange interface connects positive voltage for pin 4, pin 5, pin 7, pin 8 connect negative voltage, drawn
Pin 1, pin 2, pin 3, the transmission of the no-voltage electric current of pin 6, can be straight by electric capacity C51, electric capacity C52, electric capacity C53, electric capacity C54
Connect and block high voltage and current to flow into RS-422/485 transceivers 512, effectively prevent the equipment caused by POE power supplies are mispluged and pulled out and damage
It is bad.
4th, when the line sequence of power supply for exchange interface is pin 1, pin 2, pin 4, pin 5 connect negative voltage, pin 3, pin
6th, pin 7, pin 8 connect positive voltage, the high voltage and current of the positive voltage pin of interchanger 510 by diode D51, diode D52,
Diode D53, diode D54 are back to negative voltage pin, prevent high voltage and current to flow into the He of RS-422/485 transceivers 511
RS-422/485 transceivers 512.
Optionally, the first diode, the second diode, the 3rd diode are Schottky diode.Due to the pole of Schottky two
Pipe pressure voltage is big, can be resistant to the high voltage that standard POE power supplies provide, so Schottky diode is the excellent of the embodiment of the present invention
Choosing, but those skilled in the art can select other kinds of diode as needed during specific implementation, as long as institute
The high voltage of standard POE power supply offers is provided with diode.
What deserves to be explained is in the present invention RS-422/485 transceivers model ISL-83078/ISL83077, it is but right
The model of specific RS-422/485 transceivers is not restricted, and those skilled in the art can select in specific implementation process
The RS-422/485 transceivers of other models.
What deserves to be explained is meet GND in RJ-45 interfaces in the present invention is not limited in above-mentioned implementation with the pin for meeting VCC
Described pin 1 meets VCC in example, and pin 2 meets GND, and those skilled in the art can be selected in RJ-45 interfaces according to actual conditions
Meet GND and connect VCC two pins, as long as ensureing that GND pin is connect in implementation process to be shorted together i.e. with the pin for meeting VCC
Can.
Also, for diode protectiving scheme provided by the invention and electric capacity protectiving scheme, due to using electric capacity can be to passing
Defeated signal causes larger time delay, so user can select to protect using diode according to requirement of the transmission signal to time delay
Scheme or electric capacity protectiving scheme.The signal of transmission is high to delay requirement, then diode can be selected to be protected, for example, PPS believes
It is number high to delay requirement, then from diode；The signal of transmission is low to delay requirement, then electric capacity can be selected to be protected or selected
Select diode and electric capacity is protected together, for example, TX signals, RX signals are low to delay requirement, then from diode and electric capacity.
I.e. above-described embodiment in a practical situation, in order to protect mispluging under a variety of situations to pull out, can be combined by user.
Embodiment six
Present embodiments provide a kind of anti-POE power supplies and misplug draw out method, this method can be applied to anti-POE power supplies and misplug what is pulled out
In protection circuit, the protection circuit includes at least one diode, as shown in fig. 6, methods described includes：
Step S601, determine that POE power supplies end equipment is connected by the data transfer pin in RJ-45 interfaces with electronic equipment
When, control the electric current of the positive voltage pin output of the POE power supplies end equipment to flow through RJ-45 interfaces at least one two pole
Pipe, wherein, the rated voltage of the electronic equipment is less than the supply voltage of POE power supply end equipments；
Step S602, the electric current of control at least one diode output flow through the RJ-45 interfaces and supplied to the POE
The negative voltage pin of electric end equipment so that the electric current that the POE power supplies end equipment is output to the electronic equipment is less than default threshold
Value.
In step S602, predetermined threshold value is that will not burn out the maximum current value of electronic equipment, is user according to the electricity
What the type of sub- equipment was determined.For example, the maximum current value that makes an electronic equipment and will not burn is 5A, then the electronics is set
Standby predetermined threshold value can be 5A.The setting present invention of predetermined threshold value does not limit, as long as the predetermined threshold value can ensure electronics
Equipment is not burned out.
Realize that protection circuit that embodiment six provides scheme can be the attachment structure shown in Fig. 1 a of embodiment one, POE
Power supply end equipment is connected by the data transfer pin in RJ-45 interfaces 11 with electronic equipment 12, wherein, the electronic equipment 12
Rated voltage be less than the supply voltages of POE power supply end equipments, the electric current of POE power supply end equipment output is from described
The positive voltage pin of POE power supply end equipments flows through RJ-45 interfaces 11 and arrives diode D1, and the electric current of diode D1 outputs flows through RJ-
45 interfaces effectively prevent high voltage and current and flow into electronic equipment 12, reduce to the negative voltage pin of POE power supply end equipments
Damage of the high voltage and current to electronic equipment 12.
Realize that protection circuit that embodiment six provides scheme can be the attachment structure shown in Fig. 2 a of embodiment one, POE
Power supply end equipment is connected by the data transfer pin in RJ-45 interfaces 21 with electronic equipment 22, and one in RJ-45 interfaces 21
Individual pin is connected with power supply 23, and the protection circuit also includes：Diode D3.The electric current of POE power supply end equipment output from
The positive voltage pin of the POE power supplies end equipment flows through RJ-45 interfaces 21 and arrives diode D1, and the electric current of diode D1 outputs flows through
RJ-45 interfaces 21 arrive the negative voltage pin of POE power supply end equipments, meanwhile, the negative voltage pin of the POE power supplies end equipment
The electric current of output is stopped by diode D3, effectively prevent high voltage and current and flows into electronic equipment 22, reduces high voltage and current
Damage to electronic equipment 22.
Embodiment seven
Present embodiments provide a kind of anti-POE power supplies and misplug draw out method, this method is applied to anti-POE power supplies and misplugs the guarantor pulled out
In protection circuit, the protection circuit includes electric capacity, and methods described includes：
When it is determined that POE power supplies end equipment is connected by the data transfer pin in RJ-45 interfaces with electronic equipment, control
The electric current of the POE power supplies end equipment output flows through the electric capacity so that the POE power supplies end equipment is output to the electronics and set
Standby electric current is less than predetermined threshold value, wherein, the rated voltage of the electronic equipment is less than the power supply electricity of POE power supply end equipments
Pressure.
In above-mentioned steps, predetermined threshold value is that will not burn out the maximum current value of electronic equipment, and the specific setting present invention is not
It is construed as limiting, as long as the predetermined threshold value can ensure that electronic equipment is not burned out.
What deserves to be explained is realize that the specific device that embodiment seven provides scheme can be the base that embodiment three is provided
Stand, and the embodiment of the present invention six and embodiment seven can be applied in combination, and institute is right after realizing embodiment six and the combination of embodiment seven
It the device of induction method, can be example IV or the base station described in embodiment five, realize that anti-POE power supplies misplug and pull out protection.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of invention belong to the claims in the present invention and its equivalent technologies scope it
Interior, then the present invention is also intended to comprising including these changes and modification.
Claims (11)
1. a kind of anti-POE power supplies misplug the protection circuit pulled out, when POE power supplies end equipment passes through the data transfer in RJ-45 interfaces
When pin is connected with electronic equipment, wherein, the rated voltage of the electronic equipment is less than the power supply electricity of POE power supply end equipments
Pressure, it is characterised in that including：
First diode；
Second diode, the positive pole of second diode are connected with the negative pole of first diode, second diode
Negative pole be connected with the positive pole of first diode, formed the first parallel-connection structure；First parallel-connection structure is arranged on described
Between RJ-45 interfaces and electronic equipment connection, one end of first parallel-connection structure by the RJ-45 interfaces with it is described
The positive voltage pin connection of POE power supply end equipments, the other end are powered the negative of end equipment by the RJ-45 interfaces and the POE
Voltage pin connects.
2. protection circuit as described in claim 1, it is characterised in that a pin in RJ-45 interfaces is connected with power supply,
The protection circuit also includes：
3rd diode, the 3rd diode are connected between the RJ-45 interfaces and the power supply, wherein the described 3rd 2
The positive pole of pole pipe is connected with the power supply, and negative pole is connected with one pin in the RJ-45 interfaces.
3. protection circuit as claimed in claim 2, it is characterised in that first diode, second diode, described
3rd diode is Schottky diode.
4. a kind of base station, the base station includes RJ-45 interfaces and electronic equipment, when POE power supplies end equipment passes through the RJ-45 interfaces
In data transfer pin when being connected with the electronic equipment, wherein, the rated voltage of the electronic equipment supplies less than the POE
The supply voltage of electric end equipment, it is characterised in that the base station also includes：
The electric capacity being arranged between the RJ-45 interfaces and the electronic equipment, the electric capacity by RJ-45 interfaces with it is described
The positive voltage pin of POE power supply end equipments or the connection of negative voltage pin.
5. base station as claimed in claim 4, it is characterised in that the electric capacity holds for paster magnetic dielectric.
6. base station as claimed in claim 4, it is characterised in that the capacitance of the electric capacity is 0.1 μ F or 1 μ F.
7. any base station as described in claim 4-6, it is characterised in that also include：
4th diode；
5th diode, the positive pole of the 5th diode are connected with the negative pole of the 4th diode, the 5th diode
Negative pole be connected with the positive pole of the 4th diode, formed the second parallel-connection structure；Second parallel-connection structure is arranged on described
Between RJ-45 interfaces and electronic equipment connection, one end of second parallel-connection structure by the RJ-45 interfaces with it is described
The positive voltage pin connection of POE power supply end equipments, the other end pass through the RJ-45 interfaces and POE power supply end equipments
The negative voltage pin connection.
8. base station as claimed in claim 7 a, it is characterised in that pin in RJ-45 interfaces is connected with power supply, the base
Standing also includes：
6th diode, the 6th diode are connected between the RJ-45 interfaces and the power supply, wherein the described 6th 2
The positive pole of pole pipe is connected with the power supply, and negative pole is connected with one pin in the RJ-45 interfaces.
9. base station as claimed in claim 8, it is characterised in that the 4th diode, the 5th diode, the described 6th
Diode is Schottky diode.
10. a kind of anti-POE power supplies misplug draw out method, it is characterised in that this method is applied to anti-POE power supplies and misplugs the protection electricity pulled out
Lu Zhong, the protection circuit include at least one diode, and methods described includes：
When it is determined that POE power supplies end equipment is connected by the data transfer pin in RJ-45 interfaces with electronic equipment, described in control
The electric current of the positive voltage pin output of POE power supply end equipments flows through RJ-45 interfaces at least one diode, wherein, institute
The rated voltage for stating electronic equipment is less than the supply voltage of POE power supply end equipments；
The electric current of at least one diode output is controlled to flow through the RJ-45 interfaces to the negative of POE power supply end equipments
Voltage pin so that the electric current that the POE power supplies end equipment is output to the electronic equipment is less than predetermined threshold value.
11. a kind of anti-POE power supplies misplug draw out method, it is characterised in that this method is applied to anti-POE power supplies and misplugs the protection electricity pulled out
Lu Zhong, the protection circuit include electric capacity, and methods described includes：
When it is determined that POE power supplies end equipment is connected by the data transfer pin in RJ-45 interfaces with electronic equipment, described in control
The electric current of POE power supply end equipment outputs flows through the electric capacity so that the POE power supplies end equipment is output to the electronic equipment
Electric current is less than predetermined threshold value, wherein, the rated voltage of the electronic equipment is less than the supply voltage of POE power supply end equipments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710984677.7A CN107658861A (en) | 2017-10-20 | 2017-10-20 | A kind of anti-POE power supplies misplug the protection circuit and method pulled out |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710984677.7A CN107658861A (en) | 2017-10-20 | 2017-10-20 | A kind of anti-POE power supplies misplug the protection circuit and method pulled out |
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Family
ID=61119287
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|---|---|---|---|
| CN201710984677.7A Pending CN107658861A (en) | 2017-10-20 | 2017-10-20 | A kind of anti-POE power supplies misplug the protection circuit and method pulled out |
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Cited By (2)
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| CN109088391A (en) * | 2018-09-18 | 2018-12-25 | Tcl-罗格朗国际电工（惠州）有限公司 | Short-circuit protection circuit and nonstandard POE charger |
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Effective date of registration: 20200108 Address after: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Applicant after: Jingxin Communication System (China) Co., Ltd. Address before: 510663 Luogang District Science City, Guangzhou, Shenzhou Road, No. 10, Guangdong Applicant before: Jingxin Communication System (China) Co., Ltd. Applicant before: Jingxin Communication System (Guangzhou) Co., Ltd. Applicant before: Jingxin Communication Technology (Guangzhou) Co., Ltd. Applicant before: TIANJIN COMBA TELECOM SYSTEMS CO., LTD. |
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Address after: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Applicant after: Jingxin Network System Co.,Ltd. Address before: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Applicant before: Comba Telecom System (China) Ltd. |