Which DAQ (6025E) channels used by SCXI modules?

[rajat]

I am using a PXI 1011 based system with NI-8176,Pxi-6025E DAQ card, and four SCXI modules. I use LabVIEW 6.1 to prgram and MAX to configure the hardware usin named(virtual) channels.
I also connect one differential thermocouple input externally to the DAQ board throught a ribbon cable and CB50LP connector block. Since each SCXI module uses some channel(s) on the DAQ card, I would like to know which channel(s) are free for use for external sensors like my thermocouple. Where can I check this?

(My devices are already installed; that was done by an NI engineer. My DAQ card is shown as: "Device 4" and SCXI modules as Device_4_blah_blah")

Please help
Thanks
Rajat

[RIO-Todd]

Rajat,

If you are multiplexing all of the SCXI modules, then only analog input channel 0 of the PXI-6025E is being used by SCXI. Therefore, you can use all other analog input channels for acquiring other signals.

To access those channels in software, you will just point to a channel on the PXI-6025 (device 4 in your case). For instance, if you want to test a sensor reading in Measurment and Automation Explorer (MAX), you would right click on the PXI-6025E within devices and interfaces and select test panels and go to any channel other than channel 0. You will basically treat the signals going to the CB50LP as signals going directly to the 6025E and SCXI will have nothing to do with those readings.

Accessing the Unused Analog Input Channels of a DAQ Board Att
ached to an SCXI Chassis in Multiplexed Mode
http://digital.ni.com/public.nsf/websearch/1E9C90A0340B82E4862569520074EB69?OpenDocument