Compatibility was the overall goal of version 3.  The most notable change is the removal of our "Running Pause" button from the bottom center of the enclosure.  The main limitation of our VFD is that it only has four digital inputs available.  Two are taken up by our Manual Override functionality which has been overwhelmingly popular.  

This leaves two digital inputs available which are now dedicated to the run FWD and run REV functionality utilized by several CNC controllers including the Masso.  

The other notable change was upgrading the 4-pin control cable to a 5-pin in order to expose this new FWD and REV functionality to the controllers.

You can find a technical drawing of the enclosure attached to this article.