Heidenhain TNC 415 pinouts
Heidenhain TNC 407 / 415 / 425 LCD connection pinout used to connect LCD monitor to Heidenhain TNC 407 / 415 / 425 at the pole X43 in replacement of old Screen VDU (BC 110) You can and should connect all GND together i both ends. The shield for RGB could also be connected but I have not tried yet to do that.