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