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May 10, 2017 · And RS-485 is about voltage levels, not current direction. Both RS-485 and CAN are differential buses and they both require common ground between tranceivers, RS-485 can just handle more common-mode voltage than CAN. The difference is relevant and RS-485 bus voltages at the receiver must be between -7 and +12V compared to local ground ...
Apr 25, 2022 · CAN protocol has effortlessly taken over RS-485's market segment. Even though these two might seem similar, RS-485 lacks many features that gave CAN the ability to become superior. As a result, the CAN bus seems to be replacing it in most industrial applications. CAN is not only fast, accurate and robust, but it has many other features that RS ...
Jan 18, 2024 · The communication method, speed and bandwidth, topology and distance, fault tolerance and dependability, cost and complexity, and applications are where CAN Bus VS RS 485 diverge most. RS485 employs point-to-point communication, whereas CAN uses bus-based communication. While RS485 can accommodate more nodes on a single communication connection ...
Oct 10, 2018 · RS485 only addresses layer 1 (PHY) and CAN also adds layer 2 (PHY & DATA) in the OSI model. It is possible to compare , but better to define your bus requirements for every layer, then decide. E.g. Consider a CNC machine with 3 axis XYZ, RPM spindle and water pump etc . Maybe some GUI only works for serial ports like GRBL code with multiple ...
Mar 5, 2018 · Join Dave and Bob as they explore the similarities and differences between two key serial interface protocols, Controller Area Network (CAN) and RS-485.
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The RS-485 output is a classical diferential signal where one signal is the inverted, or mirror, version of the other. Output A is the non-inverting line and output B is the inverting line. The diferential range from +1.5V to +5V is a ‘1’ or mark and -1.5V to -5V is a ‘0’ or space. The area between -1.5V and +1.5V is undefined.
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Dec 14, 2023 · RS485 is a serial communication protocol that was standardized by the Electronic Industries Association (EIA) in 1983. It is commonly used for long-distance communication between devices and is known for its versatility and robustness. RS485 employs a balanced differential signaling scheme, just like CAN, which allows for greater noise immunity ...
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