All Questions
Tagged with can termination
43
questions
0
votes
3
answers
151
views
Add or remove 120 Ohm from the CAN circuit using Microcontroller
I want to design hardware circuit using microcontroller for CAN communication. One suggestion i require is i want to add 120 Ohm or remove it based on software configuration. I want to close the ...
- 437
0
votes
1
answer
60
views
CAN BUS Termination resistor sizing
I am using ISO1042 CAN Transceiver to establish communication between my board micro-controller with other board controller separated by 0.5m distance. I am using standard 120 ohm termination ...
1
vote
3
answers
140
views
GPIO controlled CAN bus termination technique
I have tried to design a circuit for controlling the CAN bus 120 Ohms termination resistance by using a 3.3V GPIO from a STM32 MCU.
In the SSR datasheet, it specifies that the LED voltage should ...
- 79
1
vote
1
answer
41
views
Is a CAN bus device necessary at the end of the terminated network line?
I am designing a CAN bus network with three devices near one end and one device at the other end about 8' away. As long as I retain the terminator at the far end, is a device at the far end required ...
- 11
0
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0
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89
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CAN FD termination with plugged in modules
Is it possible to use CAN FD in scenario in which there is single main device and additional modules are plugged or hot plugged into each another?
MAIN->MOD1->MOD2->MODn
The main device will ...
- 137
4
votes
0
answers
152
views
Is there an antenna problem with CAN Bus selectable split termination header pin?
I am trying to implement a jumper-selectable CAN Bus termination with a SPLIT configuration, as shown in this Analog Devices example:
https://www.analog.com/media/en/technical-documentation/user-...
- 355
1
vote
2
answers
2k
views
CAN Bus termination resistor in only 2 device connection
A termination resistor in CAN ( .. or other differential pair communication like RS485 ) is necessary to absorb reflection. The value is related to wire length, electrical frequency, baud rate. It ...
- 13
7
votes
2
answers
309
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Novel CAN bus design - needs criticism
I'm designing a CAN bus interface for a PCB I'm working on. CAN and high speed/long distances are new to me, so I have a list of concerns about my design ideas, and I would appreciate someone with ...
- 89
0
votes
2
answers
992
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Tap into CAN bus
I'm thinking about tapping into an existing CAN bus. I'm going to attach in a middle point, and I don't want to introduce any issue in the original bus.
In order not to disturb the original bus with ...
- 1,240
0
votes
0
answers
412
views
CAN bus termination resistor
I'm trying to design a CAN device where the user can select which device is the beginning/end device and activate the 120 ohm resistor accordingly. I've seen some examples using a switch, but I'm ...
- 201
1
vote
3
answers
514
views
Can a node on a terminated end of a CAN bus self-identify that it is the final node?
Using the example below, is there any way for Node1 or Node3 to be able to recognize that they are the final nodes on the CAN bus? I want to allow my device to automatically enable a 120Ohm ...
0
votes
1
answer
885
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CAN physical layer fault conditions Short circuit to battery on CANH and CANL lines analysis
In case of short circuit to battery on CANH, would the current flow as analysed below ? This is in the case of CAN transceiver TJA1042T and I got the internal block of the transciever by NXP.
Data ...
- 87
0
votes
2
answers
1k
views
Star configuration using CAN Bus, I2C or RS485
I need to create a sensor network, with a central node receiving data from +10 different nodes, each one +20meters from the central node. So basically I need to create a star configuration, with a ...
0
votes
1
answer
283
views
Considerations for CAN termination resistor location
I'm looking to incorporate a switchable 120Ω termination resistor (using a photo MOSFET) into a CAN design. Are there any issues with locating the 120Ω resistor at the CAN transceiver versus at the ...
- 183
0
votes
2
answers
2k
views
CAN Stub node termination in a network - 9.28k resistor
In a CAN network, the ends of the network has to be terminated with 120 ohm - I understand this. The middle node in the below diagram is the stub node and it does not have to be terminated, my stub ...
- 87