Operating instructions Fernotron plug switching device 2426 Y. Beenen Updated December 22, 2021 08:48 Follow Download PDF Related articles Operating instructions Fernotron receiver with light switch 2425 Operating instructions FernoTron programming center 2411 Instruction Manual Fernotron Radio Pushbutton 2430 Operating Instructions RT ConfigTool Activate login mode: DuoFern Plug-In 9472-1