From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
08-03-2007 10:08 AM
08-03-2007 11:05 AM
08-03-2007 11:24 AM
08-06-2007 04:51 PM
10-24-2007 08:31 AM
10-24-2007 11:02 AM - edited 10-24-2007 11:02 AM
Message Edited by Ching P. on 10-24-2007 11:03 AM
11-05-2007 11:38 AM
Do you have any other suggestions for troubleshooting?
Thanks.
11-05-2007 01:01 PM
mstlaurent,
Ching's reply implies that the internal overvoltage protection may be causing the extra heat. Docs for the 425 state that this internal protection will cause some leakage current. You might run an experiment where you disconnect all external wiring to 425 module and see if it still trips on overtemp. If it stops tripping out, then a much harder look at internal protection is warranted.
You mentioned that one of the 425's did not trip out. Anything different about number/type of loads connected to that module? Have you tried swapping the actual 425 modules around to see if problem moves with module or stays with position on backplane?