From the outset, Rhino 3D incorporates connectors for some of the most popular digitisers. One of these is the Hexagon Metrology Romer Arm series.
In order to run the Romer Arm from Rhino, it's necessary to first install the RDS software from the Hexagon website. This can be downloaded here.


If you're not already running Rhino, you can download a Rhino 3D trial here, or buy Rhino 3D here.
As an additional setup reference, take a look at the setup for a Microscribe Digitiser with Rhino: