Operating instructions RolloTron swivel winder standard DuoFern 2510/2550 Y. Beenen Updated September 03, 2024 13:31 Follow Download PDF Related articles Activate login mode: Swivel winder Standard DuoFern 2510 / 2550 Remove the belt winder / RolloTron if the device no longer functions. Unlock the gear unit. How can I access the PC interface of the SmartHome Box? Information on the RolloTron swivel winder Standard DuoFern 2510/2550 How can the automatic function of a RolloTron belt winder be temporarily switched off?