Damage carry over?

[jyang72211]

We have the following setup:

Chassis: PXI-1042

Controller: PXI-8105

Module: PXI-7833R

Breakout box: SCB-68

The break out box is used for the module, and we use the internal 5V that is on it.  Accidentally, I think we shorted the 5V to groud, so it no longer supplies 5V  We replaced the bad module with a good one, and the same thing happened.  We did that a couple of times, and we ended up having 6 modules without the 5V.  My co-worker was convinced that when the 1st module was shorted, it affect the controller and chassis too, so that when we inserted other modules into the bad chassis with bad controller, the modules are fired.  Is that even possible?  Should there be some sort of protection on it?  I read that there is a resetable fuse.  Howcome it doesn't work?  Any ideas?  

[USBarnes]

jyang72211,

Does this happen regardless of which slot the module is in? What is being done with the module when you notice that the 5V line malfunctions? Does this happen as soon as it is inserted into the chassis? Also, make sure that you are not hot swapping modules into the chassis. In other words, make sure the chassis is off when inserting and removing modules.

Also, according to page 2-26/27 of the R series manual, the operation of the internal fuse differs based on the revision of the module. Older revisions have a self-resetting fuse while newer versions have a fuse that must be replaced by sending the device in for repair to NI. I've linked the manual below.

Multifunction RIO User Manual:

http://www.ni.com/pdf/manuals/370489g.pdf