Best way to connect two 2040 toolboards to a duet 3 mini 5+
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I have two MKSTHR36 (2040 based) toolboards which I would like to test on an IDEX machine. They both have a permanent 120Ohm resistor installed as CAN terminator.
What's the best way to connect these to a Duet 3 mini 5+? Tool distribution board with the terminators off on the distribution board, or two wire runs all the way back to the Duet 3 mini board, connecting the boards in parallel? Anything else?
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@oliof said in Best way to connect two 2040 toolboards to a duet 3 mini 5+:
Tool distribution board with the terminators off on the distribution board
The tool distribution board, with the jumpers between each output removed, is effectively providing a daisy chain. The signal is going to and back to each connected board, then onto the next. Because those boards have termination resistors to use the tool distribution board I expect the best performance will be if you fit the jumpers to the output headers so that there is no daisy chain. You effectively get two stubs in parallel.
Similarly if you run directly from the mini 5+ you are going to be running two "stubs", so in parallel.
Edit: Based on @dc42 's point below having multiple termination resistors in the system is not recommended!
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@oliof you should remove the termination resistor from one of the tool boards. Otherwise the CAN signal voltage will be low and out of specification.
