There is no ready-to-run solution for this. Of course you could switch all motor signals with external relays or with a switch matrix to the two sets of axis-signals that are available on the PCI-7352 but I wouldn't recommend doing this as this would be way more expensive and complicated than purchasing a PCI-7354 or a PCI-7356 that support for 4 and 6 axes respectively.
Best regards,
Jochen Klier
National Instruments Germany
