多德DOLD繼電器模塊技術技術Key data of the CANopen field bus systemBus topology: Line with short stubs Twisted pair line, shielded Typical line impedance: 120 Ω (equivalent to line termination). Note: Reflections on the line ends can be avoided by bus line termination on both ends with the bus line's characteristic impedance (120 Ω). Max. 32 nodes without repeater, with repeater up to 128 nodes Max. stub length: 30 cm Relation between baud rate and bus length: 5000 m at 50 kBaud; 10 m at 1000 kBaud
Line structureThe CANopen bus system is implemented as a line structure with bus terminations on both line ends. The use of shielded lines improves its electromagnetic immunity. Electromagnetic interferences can also be avoided by the use of optical fiber cables. However this variant is more expensive compared with shielded cables. Connection of optical fiber cables is via integrated or external opto-couplers.
The figure below shows an example of how to use the DOLD CANopen PLC IL 5504 MINIMASTER for distributon boards as well as further bus nodes for the CANopen field bus system. 
Bus connectionBus nodes can be looped in the bus line or connected to the bus line via a short stub (max. 30 cm). To identify bus nodes an address (node ID) is assigned to each of them. The figure below shows the basic structure of a typical CANopen node connection to a bus with DOLD-PLC IL 5504 MINIMASTER and output module IP 5503: 
廣聯有限公司是專門從原廠走貨銷售的，保證。我司主營德國IFM易福門授權（中國）銷售處，德國易福門IFM,IFM溫度傳感器,IFM壓力傳感器,IFM流量傳感器,IFM電容式傳感器,IFM電感式傳感器等價格合理，直接從工廠走貨，貨源穩定，可以自己進口報關。
本公司自成立以來與國外多個品牌廠家達成合作關系，并已在國外成立公司直接跟品牌廠家拿貨，力求給國內客戶朋友帶來優價的*產品。與您共贏，是我們Z初的動力！ |
