excitation volatage using ni-4472 cards

[achyuth]

hi, iam configuriing ni4472 cards using DAQ-Mx drivers. iam able to give the excitation voltage for all the eight channels at a time. is it possible to give the excitation voltage  to some channels only while not giving the excitation voltage to the other channels? please help me in this regard.

[BrowningG]

Hello achyuth,

Thanks for contacting National Instruments.

It is possible to turn excitation on and off for specific channels.  The knowledgebase “How Do I Enable IEPE Excitation on My DSA Device in DAQmx?” shows how to use property nodes to turn the IEPE excitation on using property nodes.  To turn IEPE Excitation on for individual channels, it will be necessary to add some information to the property node.  By using the active channels property, you can specify a subset of channels to be used in the channel property node.  Without this property, any properties set in the DAQmx Channel property node will apply to all of the physical channels in the task.  The following image shows how to take a single channel from a group of channels and enable IEPE excitation for it.  

Please post back if you have any more questions. 

Message Edited by BrowningG on 10-09-2007 02:29 PM