{"id":11554,"date":"2025-07-08T10:44:07","date_gmt":"2025-07-08T08:44:07","guid":{"rendered":"https:\/\/www.delphin.de\/?post_type=loesung&p=11554"},"modified":"2025-07-08T10:49:07","modified_gmt":"2025-07-08T08:49:07","slug":"can-bus-data-logger","status":"publish","type":"post","link":"https:\/\/www.delphin.de\/en\/can-bus-datenlogger\/","title":{"rendered":"CAN bus data logger"},"content":{"rendered":"
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What is a CAN bus data logger<\/strong>?<\/h2>\n\n\n\n

CAN bus data loggers are primarily used in industry. The Controller Area Network (CAN) bus is a serial fieldbus system that enables manufacturer-independent (non-proprietary) data exchange between devices. CAN bus data loggers are characterized by a simple setup, extensive configuration options and self-sufficient operation. Find out in this article what CAN bus data loggers can do and what advantages result from the use of CAN bus data loggers.<\/p>\n\n<\/div>\n\n

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CAN bus - What exactly does that mean?<\/strong><\/h2>\n\n\n\n

Interfaces are required so that different components of a technical system can communicate with each other. Information is transmitted via these interfaces. Up until the 1980s, these interfaces were networked with ever more extensive cable harnesses. In a standard car at the time, these wiring harnesses could easily reach a total length of up to two kilometers. In 1983, Bosch, in collaboration with Intel, developed a new system to reduce cable harnesses - and thus save weight and costs. This system was christened the Controller Area Network: the CAN serial bus system began its triumphal march.<\/p>\n\n\n\n

In bus systems, information is transmitted via a common data line from which individual, short spur lines branch off to the individual components. On the one hand, this structure reduces cabling and, on the other, additional components can be connected at a later date without difficulty. As the data flow takes place via a common main line, a so-called protocol must be integrated into the bus system. These protocols control the data flow and route the data packets precisely to the respective connected components. In CAN bus systems, the components are connected to each other via a 2-wire bus and an additional earth cable.<\/p>\n\n<\/div>\n\n

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Physical basics of CAN bus<\/strong><\/h2>\n\n\n\n

For CAN bus systems, two-core copper cables are usually used for data transmission. Alternatively, two additional wires are also used for the power supply and earth. The data transmission rates depend on the cable length. The higher the required data rate, the shorter the cables need to be. The beginning and end of each bus line are terminating resistors with 120 Ohm. Sub-D connectors are primarily used to connect the individual components within a CAN bus system, but screw connections are also used. CAN has been standardized according to ISO 11898 since 2003.<\/p>\n\n<\/div>\n\n

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The advantages of the CAN bus system<\/strong><\/h2>\n\n\n\n

In addition to significantly lower costs, CAN bus systems also offer a high level of interference immunity and the ability to transmit data in real time. The electrical interference immunity of the CAN bus is achieved by a so-called \"differential signal\". For this purpose, one bit is mapped on two lines in parallel with a potential change in the opposite direction. If interference occurs, this interference affects both lines in the same direction. However, as the two lines have opposite levels, the difference between the two levels remains almost the same even in the event of interference. This \"Common Mode Rejection Ratio\" (CMRR) makes CAN bus systems extremely insensitive to electrical interference.<\/p>\n\n<\/div>\n\n

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Further advantages <\/strong><\/h3>\n\n\n\n