user31370: This is a part of SeeedStudio CAN-Bus shield schematic. The vertical green line on the left seems suspicious to me. Am I missing something?


user4143: No, it's not a mistake. It's related to this statement on their Wiki:

When you use more than two CAN Bus Shield in one net, you should take the impedance into consideration. You should either cut P1 in the PCB with a knife, or just remove R3 on the PCB.

If you look closely at the pads of P1 you will see a small trace joining them together. That is the "rogue" green line you found. By cutting that trace you disconnect the termination resistor. You can then re-connect the termination resistor by soldering the pads together again.

31370: <p>This is a part of SeeedStudio CAN-Bus shield schematic. The vertical green line on the left seems suspicious to me. Am I missing something?</p>

<p><a href="https://i.stack.imgur.com/yqbRv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yqbRv.png" alt="enter image description here"></a></p>
 4143: <p>No, it's not a mistake. It's related to this statement on their Wiki:</p>

<blockquote>
  <p>When you use more than two CAN Bus Shield in one net, you should take the impedance into consideration. You should either cut P1 in the PCB with a knife, or just remove R3 on the PCB.</p>
</blockquote>

<p>If you look closely at the pads of P1 you will see a small trace joining them together. That is the "rogue" green line you found. By cutting that trace you disconnect the termination resistor. You can then re-connect the termination resistor by soldering the pads together again.</p>
