CN201479151U - Intelligent CAN network converter - Google Patents
Intelligent CAN network converter Download PDFInfo
- Publication number
- CN201479151U CN201479151U CN200920234197XU CN200920234197U CN201479151U CN 201479151 U CN201479151 U CN 201479151U CN 200920234197X U CN200920234197X U CN 200920234197XU CN 200920234197 U CN200920234197 U CN 200920234197U CN 201479151 U CN201479151 U CN 201479151U
- Authority
- CN
- China
- Prior art keywords
- bus
- communication
- network
- remote
- intelligent
- 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.)
- Expired - Lifetime
Links
- 238000004891 communication Methods 0.000 claims abstract description 19
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Landscapes
- Small-Scale Networks (AREA)
Abstract
The utility model discloses an intelligent CAN network converter. The intelligent CAN network converter comprises a power supply module, a bus interface module, an optical coupler, and a control apparatus for filtering the communication data of two CAN networks and intelligently forwarding the data on the two CAN networks. The two CAN networks are completely electrically isolated so as to effectively prevent the communication of one CAN network from being influenced by the fault of a remote I/O CAN network bus. The control apparatus is connected with the optical coupler; the optical coupler is connected with the bus interface module; and the bus interface module is matched with a resistor for preventing communication interference. The intelligent CAN network converter solves the problems existing in the prior art, in which the CAN network is connected with remote I/O interface; and the remote I/O interface is not directly electrically connected with the previous communication so as to obviate the influences of the fault of the remote I/O interface or the photoelectrical connection thereof on common communication of the previous CAN bus, thereby enhancing the communication reliability of the CAN bus.
Description
Technical field
The utility model belongs to CAN Netcom news field, uses the connected mode of CAN bus remote I/O, and the utility model relates to a kind of CAN net intelligent converter.
Background technology
At the automatic field PLC of hydroelectric plant when connecting remote I/O, need carry out long-range expansion to bus, conventional technical scheme is to connect remote I/O by CAN bus fibre modulator-demodulator, CAN bus fibre modulator-demodulator or optical fiber interface go wrong may influence the problem of whole C AN bus communication, cause the paralysis of whole C AN network bus, directly influenced whole process of production. at the problem of present existence, research and development CAN bus intelligent converter is proposed, make remote I/O and prime communication not have direct electrical link, prevention remote I/O or its opto-electronic conversion junction fault effects prime CAN bus normal communication, and the communication reliability of raising CAN bus.
Summary of the invention
At the deficiencies in the prior art, the utility model proposes a kind of CAN net intelligent converter.
The utility model takes following technical scheme to realize:
CAN net intelligent converter, comprise power module, bus interface module, optocoupler, also comprise a control appliance, be used to filter the communication data of two CAN nets, two online data of CAN are realized intelligent forwarding capability, on electric, isolated two connections that CAN nets fully, when guaranteeing that effectively remote I/O CAN network bus is out of order, can not have influence on the CAN Netcom news of opposite side.Wherein, control appliance links to each other with optocoupler, and optocoupler is connected with bus interface module.The bus interface module coupling is useful on the resistance of anti-Communication Jamming.
The utility model solves the CAN net and connects the ubiquitous problem of remote I/O, make remote I/O and prime communication not have direct electrical link, prevent remote I/O or its opto-electronic conversion junction fault effects prime CAN bus normal communication, and improve the communication reliability of CAN bus.
Description of drawings
Fig. 1 is the utility model structure and schematic appearance;
Fig. 2 is the utility model theory diagram;
Fig. 3 is the utility model bus signals anti-interference process circuit diagram.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is traditional C AN network switch structure and outward appearance.
Cabinet adopts metal material, and is convenient according to the actual needs perforate, the casing silver gray, and the NARI lettering is blue, other letterings such as device signal are black.
Design cabinet size should be slightly larger than as follows: 14 * 9 * 4 (length * wide * height) unit: cm.
Adopt both sides plug-in terminal outlet method, be convenient to the isolation of signal.At the cabinet top some ￠ 4 perforates are arranged, be power supply, communication indicator light etc.
Device adopts 15 core D type heads directly to link to each other with PLC bus expansion cable, and adopts the plug-in terminal to link to each other with fibre optic modem by shielded type cable at opposite side.
The throwing that toggle switch is used for CAN bus termination resistance is moved back and the setting of this unit address.Fixing of cabinet: back-plane design has four fixing holes shown in figure two, cooperates screw and nut to be fixed in the screen cabinet.
Fig. 2 is the theory diagram of intelligent CAN network switch.
LPC2119/LPC2194 is based on 16/32 ARM7TDMI-STM CPU that supports real-time simulation and tracking, and has high speed Flash memory and the interior static RAM (SRAM) of 16kB sheet that 128/256kB embeds.
Because the 64/144 pin encapsulation of LPC2214/LPC2194, extremely low power consumption, a plurality of 32 bit timing devices, 2/4 road CAN nearly 9 external interrupt make them be specially adapted to Industry Control.
Fig. 3 is an intelligent CAN network switch bus signals anti-interference process circuit.
82C250 is in the network terminal of CAN bus, and the bus interface part must add the build-out resistor of one 120 Ω, and 82C250 avoids too drastic impact with protection, omits them, and the anti-interference of data communication and reliability are reduced greatly.Among the design, the little electric capacity of two 30pf in parallel can play the High-frequency Interference on the filtering bus and the ability of certain anti-electromagnetic radiation between the CANH of 82C250 and CANL pin and the ground.CANH links to each other with the CAN bus by the resistance of 15 Ω separately with the CANL pin simultaneously, and resistance can play certain metering function, and protection 82C250 avoids the impact of overcurrent.
It is the Perfected process that solves the conducted interference problem that photoelectricity is isolated, and it has good electrical isolation capabilities and antijamming capability, adopts optocoupler 6N137 to isolate in this programme between interface chip and the CAN controller.Optocoupler both sides power supply need be taked two power supplys through isolating simultaneously.
In addition between two CAN bus incoming ends and ground respectively reversal connection a protection diode.When the CAN bus has higher negative voltage, can play certain overvoltage protection effect by the short circuit of diode.
Claims (1)
1.CAN net intelligent converter, comprise power module, bus interface module, optocoupler, it is characterized in that, also comprise a control appliance, be used to filter the communication data of two CAN nets, two online data of CAN are realized intelligent forwarding capability, on electric, isolate two connections that CAN nets fully, when guaranteeing that effectively remote I/O CAN network bus is out of order, can not have influence on the CAN Netcom news of opposite side; Wherein, control appliance links to each other with optocoupler, and optocoupler is connected with bus interface module; The bus interface module coupling is useful on the resistance of anti-Communication Jamming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920234197XU CN201479151U (en) | 2009-08-12 | 2009-08-12 | Intelligent CAN network converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920234197XU CN201479151U (en) | 2009-08-12 | 2009-08-12 | Intelligent CAN network converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201479151U true CN201479151U (en) | 2010-05-19 |
Family
ID=42415406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920234197XU Expired - Lifetime CN201479151U (en) | 2009-08-12 | 2009-08-12 | Intelligent CAN network converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201479151U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540565A (en) * | 2020-03-26 | 2021-03-23 | 江苏世之高智能装备有限公司 | Application of remote IO technology in automation equipment |
-
2009
- 2009-08-12 CN CN200920234197XU patent/CN201479151U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540565A (en) * | 2020-03-26 | 2021-03-23 | 江苏世之高智能装备有限公司 | Application of remote IO technology in automation equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201479151U (en) | Intelligent CAN network converter | |
| CN204287792U (en) | Be applicable to the numerical model analysis simulation interface system that simulate signal long-distance transmissions is mutual | |
| CN206413068U (en) | A kind of gigabit Homeplug | |
| CN103763005A (en) | Multi-transmission-medium mixed type network camera design method | |
| CN205051721U (en) | Ethernet exchange device | |
| CN202094825U (en) | Monitoring counter current proof lightening protection header box | |
| CN202662156U (en) | Ammeter power utilization information transmission system | |
| CN203827340U (en) | Multi-transmission-medium hybrid network camera containing power line interface adapter | |
| CN203313216U (en) | Multi-medium internet gateway device | |
| CN206725688U (en) | A kind of intelligent substation transformer synthesis IED | |
| CN104518429A (en) | In-situ placement type intelligent relay protection device | |
| CN203659206U (en) | Optical communication device | |
| CN207354425U (en) | A kind of multi output end Homeplug | |
| CN206432785U (en) | A kind of Intelligent power distribution terminal of charging pile electricity consumption behavioural analysis | |
| CN201868688U (en) | Electric connector | |
| CN206620223U (en) | A kind of intelligent video monitoring data exchange system | |
| CN205028377U (en) | Signal data integration ization switching port of banking terminal machine | |
| CN204156521U (en) | A kind of surge protector of mid-span method active Ethernet | |
| CN206819349U (en) | Serial server | |
| CN212034264U (en) | Signal converter | |
| CN204928367U (en) | Electric wire netting device talk data interface | |
| CN204407872U (en) | A kind of protective device supervisory control system of 6kV power supply unit | |
| CN217363017U (en) | Inverter data acquisition device | |
| CN204595939U (en) | A kind of charge machine for supervising the lane IO control interface plate | |
| CN213693710U (en) | Lightning protection communication device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID ELECTRIC POWER RESEARCH INSITITUTE NANJ Free format text: FORMER OWNER: NANJING NARI CO., LTD. Effective date: 20131009 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: STATE GRID ELECTRIC POWER RESEARCH INSITITUTE Effective date: 20131009 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 210003 NANJING, JIANGSU PROVINCE TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131009 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: State Grid Electric Power Research Insititute Patentee after: Nanjing Nari Co., Ltd. Address before: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Patentee before: State Grid Electric Power Research Insititute Patentee before: Nanjing Nari Co., Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20171120 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: State Grid Electric Power Research Insititute Patentee after: State Grid Corporation of China Co-patentee after: NARI Technology Development Co., Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: State Grid Electric Power Research Insititute Patentee before: State Grid Corporation of China Co-patentee before: Nanjing Nari Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |
|
| CX01 | Expiry of patent term |