Greetings Kasturi,
There are several ways to determine the PCI Device ID of your board.
One is to use NI-VISA, see the
"Measurement Hardware Driver Development Kit Frequently Asked Questions" page for instructions. Basically you tell NI-VISA to show all registered devices within the system (by default this includes many PCI-based NI devices including all DAQ devices), then take a look at them.
Another method would be to use a PCI bus scanner (lspci is a good one on Linux, Windows has several commercial ones though you can find a free one if you dig through Microsoft's Hardware Compatibility Tests).
Finally, if you are familiar
with Windows drivers, digging through the Windows Registry or NI-DAQ INF files will also tell you the number.
Here is a head start: For the PCI-6025E, the device ID looks to be 0x2A80 (0x2AB0 for the PXI-6025E). You can look these up by searching the nidaq*.inf files for 6025E. I hope that helps.
Sincerely,
Jeremiah Cox
Platform Services Product Support Engineer
National Instruments -- http://www.ni.com/ask