I would like to know which Delta Tau PMAC motion controller does NI OPC server support?
Does this server works with third party OPC clients?
Do I need any special NI hardware?
No, you do not need any NI specific hardware to use NI IA-OPC server. Also, the NI IA-OPC server is OPC 2.0 compliant and hence will work with any generic OPC client that conforms to OPC 2.0 specifications. Please take a look at these links for a list of PLCs supported and more information on the IA OPC.