KUHNKE Automation 6.2.3 Installation Using the Mounting Rail Adapter The rail adapter attaches the thermo-controller to 60 mm bus bar systems, and the combination foot fits onto 5 mm and 10 mm thick double-T or triple-T bus bars between 12 mm and 30 mm wide. Resetting the adapter from 5 mm rails to 10 mm rails E 774 GB 25 30.06.2014