As our integration partners have been digging into some of the older Metasys® installations they are finding Generic IO / Point Multiplexor applications much more frequently than I thought they would.
You can still do a very successful integration with these devices but it may take a bit more planning than if they were loaded with more traditional Metasys® applications.
You can process the .PRN Metasys configuration (resource) file for these devices through the S4 Configuration File Conversion Utility to create a custom device template
You may need to investigate custom logic in the Metasys supervisory controller. For the NCM this would be GPL or JC Basic logic.
You may be able to determine how the points are used by investigating the assignment and presentation of points in the Metasys Operator Workstation
You can investigate Single Side Loop logic, Interlocks, etc. programmed into the N2 device itself utilizing HVAC Pro