Hi,
Please go to the following link and download the latest help file for the 6536:
http://digital.ni.com/manuals.nsf/websearch/DDAE1CEC74DFA3C48625750B007A1A53
In the enclosed help file, click on the "Connecting Signals" page in the contents for the pinout.
Thanks,
Keith Shapiro
National Instruments R&D