The PCi 7344 can control a brushless servo provided that the drove for your motor can take a +/- 10 volt torque signal or a step and direction signal as a command signal. An example of such a drive is the accelsus drive from Copley controls which you can find at www.copleycontrols.com Your motor must also have either quadrature encoder or analof feedback mechanisms so the 7344's on board PID loop can control your system appropriately in servo mode. The 7350 has the advantage that it can drive brusdhless servos using lower cost brushless servo drives like the ones made by advanced motion controls (www.a-m-c.com) which are drives that do not perform the electronic sinusolidal commutation, but require the controller to do so. The 7350 has the ability to perform up to fou r axis of on board sinusoidal commutation. As for yoursecond question, only PXI or CompactPCI industrial computers will have PXI slots available.