Skip to main content
edited tags
Link
oh.dae.su
  • 180
  • 2
  • 11
Copy edited (e.g. ref. <https://en.wikipedia.org/wiki/Ohm>).
Source Link

I am planning to connect (at least) two Raspberry Pi + PiCAN2 shields via CAN.

I think I understand the concept of a daisy-chained multidrop CAN line, but what about using the 120 Ohmohm resistors for termination that are provided on board by the PiCAN2 shield?

As far as I understand when I simply connect CAN High and CAN Low respectively between both PiCAN2 shields A and B as shown below, I should use the 120 Ohmohm resistors on both sides for termination. Am I right?

What happens, when I add a third identical node (RPiRaspberry Pi + PiCAN2 shield) C to the CAN bus? Do I need to terminate also on this node?
  As I can without problems also use the terminator on C, is there any drawback to using the 120 Ohmohm resistor on all nodes, not worrying about the geometry of the network?

schematic

simulate this circuit – Schematic created using CircuitLab

I am planning to connect (at least) two Raspberry Pi + PiCAN2 shields via CAN.

I think I understand the concept of a daisy-chained multidrop CAN line, but what about using the 120 Ohm resistors for termination that are provided on board by the PiCAN2 shield?

As far as I understand when I simply connect CAN High and CAN Low respectively between both PiCAN2 shields A and B as shown below, I should use the 120 Ohm resistors on both sides for termination. Am I right?

What happens, when I add a third identical node (RPi + PiCAN2 shield) C to the CAN bus? Do I need to terminate also on this node?
  As I can without problems also use the terminator on C, is there any drawback to using the 120 Ohm resistor on all nodes, not worrying about the geometry of the network?

schematic

simulate this circuit – Schematic created using CircuitLab

I am planning to connect (at least) two Raspberry Pi + PiCAN2 shields via CAN.

I think I understand the concept of a daisy-chained multidrop CAN line, but what about using the 120 ohm resistors for termination that are provided on board by the PiCAN2 shield?

As far as I understand when I simply connect CAN High and CAN Low respectively between both PiCAN2 shields A and B as shown below, I should use the 120 ohm resistors on both sides for termination. Am I right?

What happens when I add a third identical node (Raspberry Pi + PiCAN2 shield) C to the CAN bus? Do I need to terminate also on this node? As I can without problems also use the terminator on C, is there any drawback to using the 120 ohm resistor on all nodes, not worrying about the geometry of the network?

schematic

simulate this circuit – Schematic created using CircuitLab

Added additional phrasing of the question.
Source Link
oh.dae.su
  • 180
  • 2
  • 11

I am planning to connect (at least) two Raspberry Pi + PiCAN2 shields via CAN.

I think I understand the concept of a daisy-chained multidrop CAN line, but what about using the 120 Ohm resistors for termination that are provided on board by the PiCAN2 shield?

As far as I understand when I simply connect CAN High and CAN Low respectively between both PiCAN2 shields A and B as shown below, I should use the 120 Ohm resistors on both sides for termination. Am I right?

What happens, when I add a third identical node (RPi + PiCAN2 shield) C to the CAN bus? Do I need to terminate also on this node?
As I can without problems also use the terminator on C, is there any drawback to using the 120 Ohm resistor on all nodes, not worrying about the geometry of the network?

schematic

simulate this circuit – Schematic created using CircuitLab

I am planning to connect (at least) two Raspberry Pi + PiCAN2 shields via CAN.

I think I understand the concept of a daisy-chained multidrop CAN line, but what about using the 120 Ohm resistors for termination that are provided on board by the PiCAN2 shield?

As far as I understand when I simply connect CAN High and CAN Low respectively between both PiCAN2 shields A and B as shown below, I should use the 120 Ohm resistors on both sides for termination. Am I right?

What happens, when I add a third identical node (RPi + PiCAN2 shield) C to the CAN bus? Do I need to terminate also on this node?

schematic

simulate this circuit – Schematic created using CircuitLab

I am planning to connect (at least) two Raspberry Pi + PiCAN2 shields via CAN.

I think I understand the concept of a daisy-chained multidrop CAN line, but what about using the 120 Ohm resistors for termination that are provided on board by the PiCAN2 shield?

As far as I understand when I simply connect CAN High and CAN Low respectively between both PiCAN2 shields A and B as shown below, I should use the 120 Ohm resistors on both sides for termination. Am I right?

What happens, when I add a third identical node (RPi + PiCAN2 shield) C to the CAN bus? Do I need to terminate also on this node?
As I can without problems also use the terminator on C, is there any drawback to using the 120 Ohm resistor on all nodes, not worrying about the geometry of the network?

schematic

simulate this circuit – Schematic created using CircuitLab

Source Link
oh.dae.su
  • 180
  • 2
  • 11
Loading