The existing ERM and ERM Workbench both currently support Do-more, except the mappings allow you to map only to DLX, DLY, DLC, and DLV Do-more areas.
The ERM100 will be similar in that you will continue to utilize ERM Workbench for configuration (not Designer), but will also be able to map the I/O to the native Do-more data blocks like X, Y, C, V, WX and WY.
However, NEITHER of these is similar to how the built-in Ethernet I/O will work with Do-more 1.1 with the H2-DM1E CPU out its built-in Ethernet port, where the Ethernet I/O will be NATIVELY supported by the DM1E Do-more CPU and Do-more Designer (hence, no need for ERM module nor ERM Workbench). So the Ethernet I/O will automagically show up among your X, Y, WX, and WY I/O configuration, just like your local native I/O.