Timeline for CAN Bus termination resistor in only 2 device connection
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 17, 2022 at 9:46 | vote | accept | Jade Kim | ||
| Jul 16, 2022 at 19:00 | answer | added | Bryan | timeline score: 3 | |
| Jul 15, 2022 at 8:40 | comment | added | Lundin | CAN is rugged so it might be able to "limp home" if one resistor is missing. If both are missing, it rarely works. Always provide two of them, everything else is quackery and may or may not work given the circumstances. | |
| Jul 15, 2022 at 8:12 | answer | added | Justme | timeline score: 3 | |
| S Jul 15, 2022 at 5:44 | history | edited | Jade Kim | CC BY-SA 4.0 |
fixed senences and formatting to make it easier to understand
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| S Jul 15, 2022 at 5:44 | history | suggested | kruemi | CC BY-SA 4.0 |
fixed senences and formatting to make it easier to understand
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| Jul 15, 2022 at 4:35 | review | Suggested edits | |||
| S Jul 15, 2022 at 5:44 | |||||
| Jul 15, 2022 at 4:02 | comment | added | Bryan | Rs 485 has some different considerations as both 1 and 0 are driven, and the speed can be easily an order of magnitude faster - but again the decision to terminate or not to terminate wouldn’t solely depend on the number of devices. Contrary to CAN a relatively short, relatively low speed 485 bus between peers who tolerate line breaks can run just fine with no termination or pull-up/down resistors. If this question isn’t well answered by the weekend I’ll offer a detailed analysis as to why I make these claims | |
| Jul 15, 2022 at 3:55 | comment | added | Jade Kim | @Bryan what about RS485? | |
| Jul 15, 2022 at 3:50 | comment | added | Bryan | There are cases where one may not use a standard two 120 ohm resistor to terminate the bus, but “only two devices” isn’t sufficient reason. Furthermore some type of pull down resistance is mandatory as the 1 bit is undriven- the resistor must pull the lines together to create this condition. | |
| S Jul 15, 2022 at 3:42 | review | First questions | |||
| Jul 15, 2022 at 4:35 | |||||
| S Jul 15, 2022 at 3:42 | history | asked | Jade Kim | CC BY-SA 4.0 |