Fuse keeps blowing on 1HCL board

[usinjin]

Man, my latest build hasn't really been going well. My latest problem is with an 1HCL expansion board. I have 3x of them and 1x 1XD running 3.5.0 rc1. The last board (with termination resistors) is the one that blows the VIN fuse about once a week. I've been doing barely any actual moves with it, in fact the whole system has mostly been idle as my DWC spends forever just trying to reconnect...grrr.

The board is supplied with 24VDC and is on standoffs, so there's nothing touching the bottom of the board. No loose wires, not debris on the board that I can see--I'm not sure why this keeps happening. Any ideas I can test? As always any help is appreciated!

[oliof]

@usinjin it might help to see your full wiring diagram and what's connected to that last board. To me it sounds like you are running something close to or above the limit of the fuse and the occassional spike in power uses pushes it into failure.

[dc42]

@usinjin the 1HCL has two fuses. Which one blows?

[usinjin]

@dc42 VIN fuse. I'll randomly get a communication error with that board and find that it has no power because the fuse is blown. However, it's been a few days and is still good. So I'm not sure what's going on with it.