[mikets]

Great info. I am curious. Can you educate me on why it is important to insulate the cRIO chassis from other things? I have checked the cRIO motherboard and found that its ground is common to its chassis and the negative terminal of the 24V supply. When the robot is switched on, the negative terminal of the 24V supply is essentially the negative terminal of the battery. Therefore, when the robot is running, all grounds are common to the negative terminal of the battery. If anything shorted to the chassis and thus the ground, the corresponding fuses will blow (e.g. if the motor controller is shorted to ground, the fuse that supplies that controller will blow). Therefore, I would think the only way the fuse of the cRIO will blow is when something in the cRIO is shorted including the I/O modules and the digital side car. In our case, I suspect one of the loose wire had shorted one of the pins in the digital side car. But I don't understand how it will blow the cRIO fuse if its chassis is connected to the robot chassis and something was shorting to the robot chassis.