Dear sir, On the National Instruments you will find Advisors which can help you to find compatible third party products with NI products.Although the NI 6722 is not a motor drive but a analog output board, the Motor Drive advisor may help you finding an appropriate device for your application.Please put some extra attention on the cabling. Luckily for you the PCI-6722 has the same connector on the board as the NI Motor boards (which is the VHDCI connector).Maybe you already have the cable and connector block for the PCI-6722. Depending the drive selected you may be able to connect the PCI-6722 directly to the drive, otherwise you will have to use a connector block as an intermediate connection point.You can find the moton drive advisor here: http://www.ni.com/devzone/advisors/motion/driveadvisor.htmAs these drive are mainly third party product, please study the datasheet of this third party product and check compatibility with your PCI-6722.You can also have a look at the website of GlobaSpecs: http://www.globalspec.com/
Based on your requirements you should be able to find the right product for your application here.Please don't hesitate to call your local NI branch for assistance. http://www.ni.com/contact.