Hello rohrdt,
I'm not sure why you would want to connect a PC-TIO-10 to SCXI as we do not have any counter signal conditioning modules. Perhaps you are intending to use it for DIO. At any rate, they are not compatible. Currently, you must either use one of our DIO boards, or an E Series device.
Sorry for the inconvenience.
Russell
Applications Engineer
National Instruments
http://www.ni.com/support