CN111313391A - Ethernet port lightning protection surge protection circuit of industrial Internet of things gateway - Google Patents
Ethernet port lightning protection surge protection circuit of industrial Internet of things gateway Download PDFInfo
- Publication number
- CN111313391A CN111313391A CN202010202102.7A CN202010202102A CN111313391A CN 111313391 A CN111313391 A CN 111313391A CN 202010202102 A CN202010202102 A CN 202010202102A CN 111313391 A CN111313391 A CN 111313391A
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- surge
- ethernet port
- protection circuit
- gateway
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses an Ethernet port lightning protection surge protection circuit of an industrial Internet of things gateway, which is applied to a communication terminal, wherein the communication terminal comprises an RJ45 Ethernet port and a network card chip, and is characterized in that the Ethernet port lightning protection surge protection circuit of the industrial Internet of things gateway comprises a primary protection circuit and a secondary protection circuit which are arranged between the RJ45 Ethernet port and the network card chip, and the circuit is applied to the industrial Internet of things gateway terminal; the surge protection system required by the gateway power supply of the Internet of things generally comprises two stages, reliable protection can be realized by utilizing the characteristics of various surge suppression devices, surge current can be effectively discharged, surge energy is absorbed, and the integral anti-surge grade is improved, so that electronic components such as subsequent chips of the gateway of the Internet of things are effectively protected, the electronic components cannot be damaged by the surge current, the surge test standards such as GB/T17626.5 and IEC61000-4-5 are met, the 4-stage is reached, and the static test standards such as GB/T17626.2 and IEC61000-4-2 are met, and the 4-stage is reached.
Description
Technical Field
The invention relates to the field of communication gateway equipment of the Internet of things, in particular to an Ethernet port lightning protection surge protection circuit of an industrial Internet of things gateway.
Background
The industrial Ethernet interface is the most widely applied communication equipment interface at present, and the electromagnetic compatibility of the Ethernet is related to the stable operation of the communication equipment. The Ethernet is easy to generate surge under the industrial application environment and is easy to be struck by lightning when being used outdoors, and overvoltage and overcurrent generated by lightning surge can damage the electromagnetic compatibility balance of the Ethernet, so that a lightning protection scheme of an industrial Ethernet interface is necessary.
1. The equipment is installed in the field or in a strong electromagnetic industrial environment.
2. After the Ethernet port of the gateway of the industrial Internet of things is damaged by lightning, the continuity of industrial data acquisition is influenced.
3. After the industrial internet of things gateway is damaged by lightning, the maintenance cost is high.
4. High surge protection of an Ethernet port of an industrial Internet of things gateway becomes one of necessary functions of equipment;
in the industrial environment, the network communication can not avoid the high surge formed by strong electromagnetic interference and the damage of the field lightning stroke to the communication network port, and in the case, the protection circuit and the surge absorption of the Ethernet network port need to be added.
Therefore, the Ethernet port lightning and surge protection circuit of the industrial Internet of things gateway is provided.
Disclosure of Invention
The invention aims to provide an Ethernet port lightning protection surge protection circuit of an industrial Internet of things gateway, which meets the surge test standards of GB/T17626.5, IEC61000-4-5 and the like to reach 4 grades, and meets the static test standards of GB/T17626.2, IEC61000-4-2 and the like to reach 4 grades. The industrial Internet of things application environment is integrally met, and the problems in the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an industry thing networking gateway's ethernet port lightning protection surge protection circuit, is applied to communication terminal, communication terminal includes RJ45 ethernet port and network card chip, a serial communication port, industry thing networking gateway's ethernet port lightning protection surge protection circuit is including setting up RJ45 ethernet port with one-level protection circuit and second grade protection circuit between the network card chip.
By adopting the technical scheme, the circuit is applied to the industrial Internet of things gateway terminal; the surge protection system required by the gateway power supply of the Internet of things generally comprises two stages, reliable protection can be realized by utilizing the characteristics of various surge suppression devices, surge current can be effectively discharged, surge energy is absorbed, and the integral anti-surge grade is improved, so that electronic components such as subsequent chips of the gateway of the Internet of things are effectively protected, the electronic components cannot be damaged by the surge current, the surge test standards such as GB/T17626.5 and IEC61000-4-5 are met, the 4-stage is reached, and the static test standards such as GB/T17626.2 and IEC61000-4-2 are met, and the 4-stage is reached. The application environment of the industrial Internet of things is integrally met.
Preferably, the primary protection circuit comprises a ceramic gas discharge tube GDT, one end of the ceramic gas discharge tube GDT is electrically connected with the RJ45 ethernet port, and the other end of the ceramic gas discharge tube GDT is grounded.
Preferably, the ceramic gas discharge tube is of the type UN1812-90CSMD, has a capacitance of < 1.0pF and a resistance of > 1G Ω.
Preferably, the secondary protection circuit adopts a TVS tube to absorb differential mode energy as secondary protection, and the TVS tube in the secondary protection circuit adopts a transient suppression diode.
Preferably, the TVS tube is SLVU2.8-4 in model number.
Compared with the prior art, the invention has the beneficial effects that:
the circuit is applied to an industrial Internet of things gateway terminal; the surge protection system required by the gateway power supply of the Internet of things generally comprises two stages, reliable protection can be realized by utilizing the characteristics of various surge suppression devices, surge current can be effectively discharged, surge energy is absorbed, and the integral anti-surge grade is improved, so that electronic components such as subsequent chips of the gateway of the Internet of things are effectively protected, the electronic components cannot be damaged by the surge current, the surge test standards such as GB/T17626.5 and IEC61000-4-5 are met, the 4-stage is reached, and the static test standards such as GB/T17626.2 and IEC61000-4-2 are met, and the 4-stage is reached. The application environment of the industrial Internet of things is integrally met.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention;
fig. 2 is a circuit diagram of an RJ45 ethernet port according to the present invention;
FIG. 3 is an overall circuit diagram of a ceramic gas discharge tube for primary protection according to the present invention;
fig. 4 is a circuit diagram of a transient suppression diode according to the present invention.
In the figure:
1. an RJ45 ethernet port; 2. a primary protection circuit; 3. a secondary protection circuit; 4. and (5) a network card chip.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, the present invention provides a technical solution:
as shown in fig. 1, an ethernet port lightning protection surge protection circuit of an industrial internet of things gateway is applied to a communication terminal, the communication terminal includes RJ45 ethernet port 1 and network card chip 4, the ethernet port lightning protection surge protection circuit of the industrial internet of things gateway includes setting up RJ45 ethernet port 1 with one-level protection circuit 2 and second-level protection circuit 3 between network card chip 4.
By adopting the technical scheme, the circuit is applied to the industrial Internet of things gateway terminal; the surge protection system required by the gateway power supply of the Internet of things generally comprises two stages, reliable protection can be realized by utilizing the characteristics of various surge suppression devices, surge current can be effectively discharged, surge energy is absorbed, and the integral anti-surge grade is improved, so that electronic components such as subsequent chips of the gateway of the Internet of things are effectively protected, the electronic components cannot be damaged by the surge current, the surge test standards such as GB/T17626.5 and IEC61000-4-5 are met, the 4-stage is reached, and the static test standards such as GB/T17626.2 and IEC61000-4-2 are met, and the 4-stage is reached. The application environment of the industrial Internet of things is integrally met.
Specifically, as shown in fig. 3, the primary protection circuit 2 includes a ceramic gas discharge tube GDT, one end of the ceramic gas discharge tube GDT is electrically connected to the RJ45 ethernet port 1, and the other end of the ceramic gas discharge tube is grounded.
Specifically, as shown in FIG. 3, the ceramic gas discharge tube is UN1812-90CSMD, with a capacitance value of < 1.0pF and a resistance of > 1G Ω.
Specifically, as shown in fig. 4, the secondary protection circuit 3 adopts a TVS tube to absorb differential mode energy as secondary protection, and the TVS tube in the secondary circuit protection adopts a transient suppression diode.
Specifically, as shown in FIG. 4, the TVS tube has a model number SLVU 2.8-4.
The working principle is as follows:
the surge protection circuit is applied to an industrial Internet of things gateway terminal, a surge protection system required by an Internet of things gateway power supply generally consists of two stages, reliable protection can be realized by utilizing the characteristics of various surge suppression devices, surge current can be effectively discharged, surge energy is absorbed, and the integral anti-surge grade is improved, so that electronic devices such as subsequent chips of the Internet of things gateway are effectively protected, the electronic devices are prevented from being damaged by the surge current, the surge test standards such as GB/T17626.5 and IEC61000-4-5 are met, the level 4 is reached, and the static test standards such as GB/T17626.2 and IEC61000-4-2 are met, and the level 4 is reached. The application environment of the industrial Internet of things is integrally met.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides an industry thing networking gateway's ethernet port lightning protection surge protection circuit, is applied to communication terminal, communication terminal includes RJ45 ethernet port (1) and network card chip (4), its characterized in that, industry thing networking gateway's ethernet port lightning protection surge protection circuit is including setting up RJ45 ethernet port (1) with one-level protection circuit (2) and second grade protection circuit (3) between network card chip (4).
2. The Ethernet port (1) of the gateway of the Internet of things of industry of claim 1 is protected from lightning surges, characterized in that: one-level protection circuit (2) include ceramic gas discharge tube GDT, and ceramic gas discharge tube GDT's one end and RJ45 ethernet port (1) electricity are connected, and ceramic gas discharge tube's the other end ground connection.
3. The Ethernet port (1) of the gateway of the Internet of things of industry of claim 2 is provided with a lightning surge protection circuit, which is characterized in that: the ceramic gas discharge tube is UN1812-90CSMD, the capacitance value is less than 1.0pF, and the resistance is more than 1G omega.
4. The Ethernet port (1) of the gateway of the Internet of things of industry of claim 1 is protected from lightning surges, characterized in that: the secondary protection circuit (3) adopts a TVS tube to absorb differential mode energy as secondary protection, and the TVS tube adopts a transient suppression diode in the secondary circuit protection.
5. The Ethernet port (1) of the gateway of the Internet of things of industry of claim 5 is provided with a lightning surge protection circuit, which is characterized in that: the model of the TVS tube is SLVU 2.8-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202102.7A CN111313391A (en) | 2020-03-20 | 2020-03-20 | Ethernet port lightning protection surge protection circuit of industrial Internet of things gateway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202102.7A CN111313391A (en) | 2020-03-20 | 2020-03-20 | Ethernet port lightning protection surge protection circuit of industrial Internet of things gateway |
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| Publication Number | Publication Date |
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| CN111313391A true CN111313391A (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010202102.7A Pending CN111313391A (en) | 2020-03-20 | 2020-03-20 | Ethernet port lightning protection surge protection circuit of industrial Internet of things gateway |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114143120A (en) * | 2020-09-03 | 2022-03-04 | 瑞昱半导体股份有限公司 | Ethernet power supply device and power management method thereof |
-
2020
- 2020-03-20 CN CN202010202102.7A patent/CN111313391A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114143120A (en) * | 2020-09-03 | 2022-03-04 | 瑞昱半导体股份有限公司 | Ethernet power supply device and power management method thereof |
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