I see. Thanks for clearing the confusion. Yes, that's easy to do. You just plug in the UC400 to the DB25 on the box. No need of soldering because there is a ready made ribbon cable which is delivered with the UC400, which is the obvious choice for you. Just connect that to a small psu and to the LAN and off you go. It should work immediately once you have configured it. Will you be using UCCNC as well? I think it would be the best and maybe CNCDrive has some special deal when you buy both. I got my license almost for free when I bought my UC300ETH some years ago.