Quote:
Originally Posted by Peter Johnson
For robustness some systems pass around the control power. In these systems, the CAN bus control logic on each component is powered from the CAN bus power lines instead of the mains supply, ensuring the component is always reachable even if the mains supply to that component is lost (with optoisolation between the CAN control logic and the rest of the circuitry). This could be useful even in the FRC world: for example, tripping a breaker would not cause that CAN bus component (e.g. motor controller) to drop off the bus (so you could still pull status, and it could report it doesn't have mains power etc).
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Note the new PDB is CAN enabled so it can report a tripped breaker as well as the current flowing through each breaker. So you will be able to tell if something on the BUS isn't responding due to a tripped/cycling breaker.