CN202183781U - CAN (Control Area Network) bus network switch - Google Patents
CAN (Control Area Network) bus network switch Download PDFInfo
- Publication number
- CN202183781U CN202183781U CN2011202999163U CN201120299916U CN202183781U CN 202183781 U CN202183781 U CN 202183781U CN 2011202999163 U CN2011202999163 U CN 2011202999163U CN 201120299916 U CN201120299916 U CN 201120299916U CN 202183781 U CN202183781 U CN 202183781U
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- bus
- switch
- bus network
- network
- interface
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Abstract
The utility model discloses a CAN bus network switch which comprises a plurality of CAN bus interfaces connected with CAN bus equipment, and different CAN bus interfaces are connected by using differential lines; a dial switch for controlling the on/off state of the differential line and a terminal resistor with 120ohm are connected to each pair of differential lines. The CAN bus network switch can realize a passive CAN bus network data switch which is practical and reliable and can be produced in batch.
Description
Technical field
The utility model discloses a kind of CAN bus network switch.
Background technology
(Control Area Network is the data transmission network of bus form CAN) to control area net, is widely used in Aero-Space, automotive electronics, Industry Control scene etc.When bus is used, generally need to adopt certain mode that a plurality of nodes are connected on same the bus, therefore all need to make specially many tapping cables of moderate length, to constitute the network topology of shared bus to each application scenario.This many tapping cables do not utilize batch process, often formulate according to the model task, do not utilize repeated use.
The utility model content
The technology of the utility model is dealt with problems and is: overcome the deficiency of prior art, a kind of CAN bus network switch is provided.Adopt the utility model can realize practical reliable, the convenient passive CAN bus network data switching exchane of producing in batches.
The technical solution of the utility model is:
Said CAN bus network switch comprises: a plurality of CAN EBIs that link to each other with the CAN bus apparatus, adopt differential lines to link to each other between the different CAN EBIs; Be connected with on the every pair of differential lines be used to control connect the toggle switch and the 120 Ω terminal resistances of the on off operating mode of differential lines.
Said CAN EBI is DB9-F interface or DB9-M interface, and different CAN bus network switches can carry out cascade through DB9-F interface and DB9-M interface.
The utility model compared with prior art has following advantage:
The utility model is owing to adopt centralized CAN bus network switch; Compare with traditional bus network connected mode; Only need each node to utilize the DB9 interface cable of standard to be connected to CAN bus switch machine and get final product, do not need to make specially many tapping cables, therefore improved developer's operating efficiency greatly; Also reduce the cost of single-piece production, accelerated the research and development progress.
Description of drawings
Fig. 1 is the utility model sketch map;
Fig. 2 is an instance graph for the utility model.
Embodiment
Just combine accompanying drawing that the utility model is done further introduction below.
Be illustrated in figure 1 as the utility model sketch map.Described CAN bus network switch comprises a plurality of CAN EBIs that link to each other with CAN equipment, and different CAN EBIs is inner continuous through differential lines at switch.
CAN bus network switch inner utilization circuit board cabling connects all stitch of all CAN EBIs one to one, can be divided into differential lines and ground wire altogether.The every pair of differential lines is all as the shared bus passage of CAN bus network.CAN bus network switch concentrates on shared bus in the switch, also makes the equal mode of track lengths of differential pair ensure the resistors match property of CAN bus network as far as possible through widening the circuit board cabling.In addition, the bus network switch also provides 120 Ω terminal resistances by toggle switch control break-make to every pair of differential lines.When concrete the use, only need confirm that the break-make of different differential lines is implemented in the exchange on the different CAN EBIs through toggle switch.
Above-mentioned CAN EBI comprises DB9-F interface or DB9-M interface, can realize the cascade of inter-exchange between the different switches through DB9-F interface and DB9-M interface.
Embodiment
CAN bus switch machine provides 16 CAN EBIs, and wherein 6 is DB9 (F), and 10 is DB9 (M), can insert 16 CAN bus nodes altogether.Each network node only needs to be connected to CAN bus network switch through twisted-pair feeder or common cable, can add the CAN bus network.Switch provides configurable terminal resistance to each CAN EBI, through the network insertion or the disconnection of toggle switch control terminal resistance.The parts that CAN bus switch machine inside need initiatively not power up all adopt passive block, need not introduce power supply.CAN bus switch machine can cascade be formed more massive network.
Be illustrated in figure 2 as the present embodiment sketch map; The internal circuit board of the utility model is a passive structures, does not need external power source, each differential pair has all been designed 120 Ω terminal resistances 2 of toggle switch 1 control break-make; Circuit board adopts two-layer wiring, and live width adopts 30mil～50mil.Circuit board adopts data/address bus to connect all DB9 connectors, and each DB9 connector pin connects the data wire of the corresponding position of data/address bus respectively
Only need that when using all CAN bus nodes are connected to this switch and can constitute the complete CAN bus network, through the terminal resistance quantity on the toggle switch control bus network on the switch to reach best matching.The stube cable of CAN bus node and CAN bus network inter-exchange can adopt the point-to-point direct-connected cable of DB9, also can adopt a pair of difference cable according to the actual task needs.In practical application, often certain CAN bus node is replaced with bus monitor node (like oscilloscope etc.), thereby carry out the mutual monitoring of bus data in real time.
The unspecified part of the utility model belongs to general knowledge as well known to those skilled in the art.
Claims (2)
1. CAN bus network switch is characterized in that comprising: a plurality of CAN EBIs that link to each other with the CAN bus apparatus, adopt differential lines to link to each other between the different CAN EBIs; Be connected with on the every pair of differential lines be used to control connect the toggle switch and the 120 Ω terminal resistances of the on off operating mode of differential lines.
2. a kind of CAN bus network switch according to claim 1 is characterized in that: said CAN EBI is DB9-F interface or DB9-M interface, and different CAN bus network switches can carry out cascade through DB9-F interface and DB9-M interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202999163U CN202183781U (en) | 2011-08-17 | 2011-08-17 | CAN (Control Area Network) bus network switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202999163U CN202183781U (en) | 2011-08-17 | 2011-08-17 | CAN (Control Area Network) bus network switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202183781U true CN202183781U (en) | 2012-04-04 |
Family
ID=46176801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202999163U Expired - Lifetime CN202183781U (en) | 2011-08-17 | 2011-08-17 | CAN (Control Area Network) bus network switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202183781U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326271A (en) * | 2013-06-03 | 2013-09-25 | 江苏银佳企业集团有限公司 | Drawer-type switch cabinet |
| CN110677332A (en) * | 2019-09-20 | 2020-01-10 | 中国北方车辆研究所 | Design method of FlexRay bus star coupler with network configuration and network management functions |
-
2011
- 2011-08-17 CN CN2011202999163U patent/CN202183781U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326271A (en) * | 2013-06-03 | 2013-09-25 | 江苏银佳企业集团有限公司 | Drawer-type switch cabinet |
| CN103326271B (en) * | 2013-06-03 | 2016-03-02 | 江苏银佳企业集团有限公司 | A kind of drawer-type switch cabinet |
| CN110677332A (en) * | 2019-09-20 | 2020-01-10 | 中国北方车辆研究所 | Design method of FlexRay bus star coupler with network configuration and network management functions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120404 |
|
| CX01 | Expiry of patent term |