CN107360053A - Technical grade serial server - Google Patents
Technical grade serial server Download PDFInfo
- Publication number
- CN107360053A CN107360053A CN201710479954.9A CN201710479954A CN107360053A CN 107360053 A CN107360053 A CN 107360053A CN 201710479954 A CN201710479954 A CN 201710479954A CN 107360053 A CN107360053 A CN 107360053A
- Authority
- CN
- China
- Prior art keywords
- serial
- master controller
- circuit
- technical grade
- media
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/28—Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
-
- 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
- H02H9/043—Protection of over-voltage protection device by short-circuiting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses technical grade serial server, including：Serial ports photoisolator, mixed-media network modules mixed-media, master controller and serial port circuit module, redundant power module and the memory module being connected respectively with master controller；Serial ports photoisolator is connected with serial port circuit module, and CPLD control circuits are also associated between master controller and serial port circuit module, and mixed-media network modules mixed-media is connected by network isolation transformer with master controller；Master controller uses S3C2440 cake cores；CPLD control circuits are used for the stability for keeping each serial communication; prevent from interfering with each other between each serial ports; CPLD control circuits use EPM570T144I5N cake cores, and network isolation transformer uses FC1088NLE cake cores, and for carrying out insulation blocking to mixed-media network modules mixed-media.It is small that the technical grade serial server overcomes general industry serial server operating temperature range, and the problem of poor anti jamming capability.
Description
Technical field
The present invention relates to serial server field, in particular it relates to a kind of technical grade serial server.
Background technology
With the development of technology of Internet of things, during the equipment of more and more bottoms needs to be connected into Ethernet so as to which data are reached
The heart controls computer room.Simultaneously as the rapid development of electronic technology and network communications technology, data acquisition transmission are gradually applied each
Individual field, permeate in many aspects such as telecommunications, electric power, Industry Controls.In traditional attendance checking system, card system, gate inhibition system
System, POS consumption systems, doctor's safety-protection system and Industry Control, electric power, telecommunications etc. field, serial communication server extensive use
Wherein.Serial port networked server is connected to sensor, detector, card reader or other equipment to be used as interface transmission data.
In short range transmission, serial communication is easily achieved and safeguarded these data, and has preferable data transmission performance.Serial ports
Server is divided into common serial server and technical grade serial server according to the field difference of application, and technical grade serial port service
The working environment of device is more severe, for example serial server must adapt to the operating temperature of more large span, and to anti-interference energy
Power requires high.
Therefore it provides it is a kind of in use can in the environment of -40 DEG C to 85 DEG C normal work, antijamming capability
The problem of more preferable technical grade serial server is urgent need to resolve of the present invention.
The content of the invention
It is an object of the invention to provide a kind of technical grade serial server, and the technical grade serial server can be at -40 DEG C
Normal work in the environment of to 85 DEG C, and antijamming capability is more preferable.
To achieve these goals, the invention provides a kind of technical grade serial server, the technical grade serial port service
Device includes：Serial ports photoisolator, mixed-media network modules mixed-media, master controller and the serial port circuit mould being connected respectively with the master controller
Block, redundant power module and memory module；
The serial ports photoisolator is connected with the serial port circuit module, the master controller and the serial port circuit mould
CPLD control circuits are also associated between block, the mixed-media network modules mixed-media is connected by network isolation transformer with the master controller；
Wherein, the master controller uses S3C2440 cake cores, and for performing data processing and the control of signal；The CPLD
Control circuit is used for the stability for keeping each serial communication, prevents from interfering with each other between each serial ports, and CPLD control circuits make
With EPM570T144I5N cake cores, the network isolation transformer uses FC1088NLE cake cores, and for the network
Module carries out insulation blocking.
Preferably, the memory module includes：RAM memory and ROM memory, the RAM memory use
MT48LC16M16A2P-6AIT cake cores, the ROM memory use K9F1G08UOE-SIBO cake cores.
Preferably, the mixed-media network modules mixed-media uses redundant network module, and each mixed-media network modules mixed-media includes connected network processing electricity
Road and network interface interface circuit, and the network processing circuitry is also connected with the master controller, the network processing circuitry uses
DM9000CIEP cake cores.
Preferably, the serial port circuit module includes：Serial expanded circuit, serial ports process circuit and RJ45 type interfaces,
The serial expanded circuit is connected with the master controller, divides serial ports to be connected to the string on the serial expanded circuit
Mouth process circuit, and each serial ports process circuit is connected with RJ45 type interfaces.
Preferably, serial ports photoisolator, the serial ports photoisolator are also associated with the serial expanded circuit.
Preferably, the technical grade serial server also includes the reset circuit being connected respectively with the master controller, institute
State the system initialization that reset circuit is configured to ensure that the master controller.
Preferably, ESD electrostatic discharge protective circuits are connected with the master controller.
Preferably, abnormal monitoring circuit is connected with the master controller, is also associated with reporting on the abnormal monitoring circuit
Alert device.
According to above-mentioned technical proposal, when in use due to its working environment in technical grade serial server provided by the invention
Particularity, it is necessary under high temperature and low temperature condition all right normal work, so having for the building block in serial server
The requirement of wide temperature, for example temperature requirement is between -30 DEG C to 85 DEG C.Heretofore described master controller uses S3C2440 cores
Piece, and for performing data processing and the control of signal, the CPLD control circuits are used to keep the steady of each serial communication
It is qualitative, prevent from interfering with each other between each serial ports, and CPLD control circuits use EPM570T144I5N cake cores, the network every
FC1088NLE cake cores are used from transformer, and for carrying out insulation blocking to the mixed-media network modules mixed-media, are used in the present invention
CPLD control circuits and network isolation transformer all meet temperature requirement, and CPLD control circuits use in common serial server
EPM570T144C5N, network isolation transformer are all unsatisfactory for requiring using FC1008CLE, in order to further increase work of the present invention
The antijamming capability of industry level serial server, the power module use redundant power module, including at least two power supplys, double electricity
B0505S-2W core power modules are used in source design, and when wherein power supply breaks down all the way, automatically switch another redundant electric
Source powers so that whole system does not have any influence.Technical grade serial server provided by the invention can be at -40 DEG C to 85 DEG C
In the environment of normal work, and antijamming capability is more preferable.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the composition structure chart of the technical grade serial server provided in a kind of preferred embodiment of the present invention.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
As shown in figure 1, the invention provides a kind of technical grade serial server, the technical grade serial server includes：
Serial ports photoisolator, mixed-media network modules mixed-media, master controller and the serial port circuit module being connected respectively with the master controller, redundant electric
Source module and memory module；The serial ports photoisolator is connected with the serial port circuit module, the master controller with
Be also associated with CPLD control circuits between the serial port circuit module, the mixed-media network modules mixed-media by network isolation transformer with it is described
Master controller is connected；Wherein, the master controller uses S3C2440 cake cores, and for performing data processing and signal
Control；The CPLD control circuits are used for the stability for keeping each serial communication, prevent from interfering with each other between each serial ports, and
CPLD control circuits use EPM570T144I5N cake cores, and the network isolation transformer uses FC1088NLE cake cores, and
For carrying out insulation blocking to the mixed-media network modules mixed-media.
According to above-mentioned technical proposal, when in use due to its working environment in technical grade serial server provided by the invention
Particularity, it is necessary under high temperature and low temperature condition all right normal work, so having for the building block in serial server
The requirement of wide temperature, for example temperature requirement is between -30 DEG C to 85 DEG C.Heretofore described master controller uses S3C2440 cores
Piece, and for performing data processing and the control of signal, the CPLD control circuits are used to keep the steady of each serial communication
It is qualitative, prevent from interfering with each other between each serial ports, and CPLD control circuits use EPM570T144I5N cake cores, the network every
FC1088NLE cake cores are used from transformer, and for carrying out insulation blocking to the mixed-media network modules mixed-media, are used in the present invention
CPLD control circuits and network isolation transformer all meet temperature requirement, and CPLD control circuits use in common serial server
EPM570T144C5N, network isolation transformer are all unsatisfactory for requiring using FC1008CLE, in order to further increase work of the present invention
The antijamming capability of industry level serial server, the power module use redundant power module, including at least two power supplys, double electricity
B0505S-2W core power modules are used in source design, and when wherein power supply breaks down all the way, automatically switch another redundant electric
Source powers so that whole system does not have any influence.Technical grade serial server provided by the invention can be at -40 DEG C to 85 DEG C
In the environment of normal work, and antijamming capability is more preferable.
In a kind of preferred embodiment of the present invention, the memory module includes：RAM memory and ROM storages
Device, wherein, the RAM memory is used for the data for storing serial server, and the ROM memory is then system storage,
For storing the system needed for main controller system；In order to meet the temperature requirement of technical grade, the RAM memory uses
MT48LC16M16A2P-6AIT cake cores, the ROM memory use K9F1G08UOE-SIBO cake cores.
In a kind of preferred embodiment of the present invention, the mixed-media network modules mixed-media uses redundant network module, and each net
Network module includes connected network process circuit and network interface interface circuit, and the network processing circuitry also with the master controller phase
Even, the network processing circuitry uses DM9000CIEP cake cores, there is provided the unrelated interface of medium is provided with supporting to connect
The home phone line network equipment or other transceivers of Media Independent Interface function, meet IEEE 802.3u specifications, by automatic
Coordination function will be automatically performed configuration to be adapted to its line bandwidth to greatest extent, and exist between at least two mixed-media network modules mixed-medias
Redundant associations, i.e., one of mixed-media network modules mixed-media are redundant network module, and server occurs network interruption etc. and asked in the course of the work
During topic, redundant network module normal work, prevent server system from causing the stopping entirely working extremely.So as to further improve
The antijamming capability of the serial server of the present invention.
In a kind of preferred embodiment of the present invention, the serial port circuit module includes：Serial expanded circuit, serial ports
Process circuit and RJ45 type interfaces, the serial expanded circuit are connected with the master controller, on the serial expanded circuit
The serial ports that divides be connected to the serial ports process circuit, and each serial ports process circuit is connected with RJ45 type interfaces,
The serial expanded circuit is used for a serial ports expansion into multiple serial ports, and CPLD control circuits are used to keep each serial ports to lead to
The stability of news, prevent from interfering with each other between each serial ports.
In a kind of preferred embodiment of the present invention, serial ports Phototube Coupling is also associated with the serial expanded circuit
Device, the serial ports photoisolator, the serial ports photoisolator can be carried out preferably to the serial ports on serial expanded circuit
Insulation blocking, damage to serial ports of phenomena such as preventing electric shock, surge.
The present invention a kind of preferred embodiment in, the technical grade serial server also include respectively with the master
The connected reset circuit of controller, the reset circuit are configured to ensure that the system initialization of the master controller.
In a kind of preferred embodiment of the present invention, ESD electrostatic discharge protective circuits are connected with the master controller.
In circuit inside serial server, static discharge phenomenon is very common, and it can damage the component of inside, so this hair
The bright middle setting ESD electrostatic discharge protective circuits can effectively prevent static discharge phenomenon from being brought to the circuit components of the present invention
Damage, so as to effectively extend the service life of the technical grade serial server internal component of the present invention.
In a kind of preferred embodiment of the present invention, abnormal monitoring circuit is connected with the master controller, it is described
Alarm is also associated with abnormal monitoring circuit, the abnormal monitoring circuit can monitor the abnormal conditions of the master controller,
Such as voltage it is excessive the problems such as, and the alarm then effectively notifies that staff is checked or repaired to it, the report
Alert device is wireless alarm, can be sent abnormal signal to mobile terminal by wireless transport module, so as to convenient work
Personnel's checks.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (8)
1. a kind of technical grade serial server, it is characterised in that the technical grade serial server includes：Serial ports Phototube Coupling
Device, mixed-media network modules mixed-media, master controller and the serial port circuit module being connected respectively with the master controller, redundant power module and deposit
Memory modules；
The serial ports photoisolator is connected with the serial port circuit module, the master controller and the serial port circuit module it
Between be also associated with CPLD control circuits, the mixed-media network modules mixed-media is connected by network isolation transformer with the master controller；Wherein,
The master controller uses S3C2440 cake cores, and for performing data processing and the control of signal；The CPLD controls
Circuit processed is used for the stability for keeping each serial communication, prevents from interfering with each other between each serial ports, and CPLD control circuits use
EPM570T144I5N cake cores, the network isolation transformer use FC1088NLE cake cores, and for the network mould
Block carries out insulation blocking.
2. technical grade serial server according to claim 1, it is characterised in that the memory module includes：RAM is deposited
Reservoir and ROM memory, the RAM memory use MT48LC16M16A2P-6AIT cake cores, and the ROM memory uses
K9F1G08UOE-SIBO cake cores.
3. technical grade serial server according to claim 1, it is characterised in that the mixed-media network modules mixed-media uses redundant network
Module, and each mixed-media network modules mixed-media includes connected network process circuit and network interface interface circuit, and the network processing circuitry also with
The master controller is connected, and the network processing circuitry uses DM9000CIEP cake cores.
4. technical grade serial server according to claim 1, it is characterised in that the serial port circuit module includes：String
Port expansion circuit, serial ports process circuit and RJ45 type interfaces, the serial expanded circuit is connected with the master controller, described
Serial ports is divided to be connected to the serial ports process circuit on serial expanded circuit, and each serial ports process circuit connects
There are RJ45 type interfaces.
5. technical grade serial server according to claim 4, it is characterised in that be also connected with the serial expanded circuit
There are serial ports photoisolator, the serial ports photoisolator.
6. technical grade serial server according to claim 1, it is characterised in that the technical grade serial server also wraps
Include the reset circuit being connected respectively with the master controller, the system that the reset circuit is configured to ensure that the master controller
Initialization.
7. technical grade serial server according to claim 1, it is characterised in that be connected with ESD on the master controller
Electrostatic discharge protective circuit.
8. technical grade serial server according to claim 7, it is characterised in that be connected with exception on the master controller
Supervisory circuit, alarm is also associated with the abnormal monitoring circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710479954.9A CN107360053A (en) | 2017-06-22 | 2017-06-22 | Technical grade serial server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710479954.9A CN107360053A (en) | 2017-06-22 | 2017-06-22 | Technical grade serial server |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107360053A true CN107360053A (en) | 2017-11-17 |
Family
ID=60273017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710479954.9A Pending CN107360053A (en) | 2017-06-22 | 2017-06-22 | Technical grade serial server |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107360053A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108617132A (en) * | 2018-05-18 | 2018-10-02 | 安徽康海时代科技股份有限公司 | Support two connection four serial servers of session number |
| CN108710586A (en) * | 2018-05-18 | 2018-10-26 | 安徽康海时代科技股份有限公司 | Two serial servers with DTU functions |
| CN108710589A (en) * | 2018-05-18 | 2018-10-26 | 安徽康海时代科技股份有限公司 | 32 serial servers with DTU functions |
| CN108733592A (en) * | 2018-05-18 | 2018-11-02 | 安徽康海时代科技股份有限公司 | Eight serial servers with DTU functions |
| CN108733605A (en) * | 2018-05-18 | 2018-11-02 | 安徽康海时代科技股份有限公司 | Single serial server with DTU functions |
| CN108763123A (en) * | 2018-05-18 | 2018-11-06 | 安徽康海时代科技股份有限公司 | Four serial servers with DTU functions |
| CN108809660A (en) * | 2018-05-18 | 2018-11-13 | 安徽康海时代科技股份有限公司 | 16 serial servers with DTU functions |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106682543A (en) * | 2016-12-23 | 2017-05-17 | 安徽康海时代科技股份有限公司 | RJ45 type serial server with redundant isolation protection effect |
| CN106776154A (en) * | 2016-11-15 | 2017-05-31 | 安徽康海时代科技股份有限公司 | Multi-channel redundant isolated serial port communication server |
| CN106845294A (en) * | 2016-12-23 | 2017-06-13 | 安徽康海时代科技股份有限公司 | RJ45 type serial servers with serial ports protection |
-
2017
- 2017-06-22 CN CN201710479954.9A patent/CN107360053A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106776154A (en) * | 2016-11-15 | 2017-05-31 | 安徽康海时代科技股份有限公司 | Multi-channel redundant isolated serial port communication server |
| CN106682543A (en) * | 2016-12-23 | 2017-05-17 | 安徽康海时代科技股份有限公司 | RJ45 type serial server with redundant isolation protection effect |
| CN106845294A (en) * | 2016-12-23 | 2017-06-13 | 安徽康海时代科技股份有限公司 | RJ45 type serial servers with serial ports protection |
Non-Patent Citations (1)
| Title |
|---|
| 赵雪: "《信息管理***》", 31 January 2015, 吉林大学出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108617132A (en) * | 2018-05-18 | 2018-10-02 | 安徽康海时代科技股份有限公司 | Support two connection four serial servers of session number |
| CN108710586A (en) * | 2018-05-18 | 2018-10-26 | 安徽康海时代科技股份有限公司 | Two serial servers with DTU functions |
| CN108710589A (en) * | 2018-05-18 | 2018-10-26 | 安徽康海时代科技股份有限公司 | 32 serial servers with DTU functions |
| CN108733592A (en) * | 2018-05-18 | 2018-11-02 | 安徽康海时代科技股份有限公司 | Eight serial servers with DTU functions |
| CN108733605A (en) * | 2018-05-18 | 2018-11-02 | 安徽康海时代科技股份有限公司 | Single serial server with DTU functions |
| CN108763123A (en) * | 2018-05-18 | 2018-11-06 | 安徽康海时代科技股份有限公司 | Four serial servers with DTU functions |
| CN108809660A (en) * | 2018-05-18 | 2018-11-13 | 安徽康海时代科技股份有限公司 | 16 serial servers with DTU functions |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107360053A (en) | Technical grade serial server | |
| US10097034B2 (en) | UPS system with network monitoring and attached battery pack information sensing functions | |
| US7443646B2 (en) | Environmentally hardened ethernet switch | |
| CN106648019A (en) | Constant voltage protection serial communication server | |
| CN107229313A (en) | The serial server of four net eight with terminal | |
| EP3309920B1 (en) | Method and device for voltage balance | |
| CN107919652B (en) | Three-out-two protection topological structure and method of flexible direct current system converter valve | |
| CN109327022B (en) | Method and apparatus for surge protection of distributed control system components | |
| CN103730951B (en) | A kind of power-supply management system and method thereof | |
| CN210640904U (en) | CAN bus interface protection circuit, communication module and system | |
| US10122291B2 (en) | Redundant control device and method of HVDC system | |
| CN106776154A (en) | Multi-channel redundant isolated serial port communication server | |
| CN204464985U (en) | A kind of POE system protection circuit and POE guard system | |
| CN106845294A (en) | RJ45 type serial servers with serial ports protection | |
| EP4002637A1 (en) | Power supply device and control method | |
| CN107394769A (en) | Power supply protector and communication in moving satellite communication antenna equipment | |
| KR20130088913A (en) | Surge protecting system for energy storage apparatus and method therefor | |
| US9281868B2 (en) | Power line communications zoning device | |
| CN205811534U (en) | A kind of Ethernet Surge Protector | |
| KR20020048281A (en) | Method and system for providing power fault tolerance in a network of chained computer system | |
| CN113300885B (en) | Network switching equipment and method | |
| CN210572671U (en) | Leakage current detection device based on SPD | |
| CN101697094A (en) | Double-power power supply unit and method | |
| CN106682543A (en) | RJ45 type serial server with redundant isolation protection effect | |
| CN113533916A (en) | Multifunctional insulation detector based on insulation monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171117 |