You can just insert a DVD with newer maps that after a while the RNS-510 will ask if you want it to copy the maps or just use the DVD instead. After choosing to copy the maps it will take around 1h to finish the process. In the end it will inform that you can eject the DVD.
If you have POI with speed cameras (included in the maps version or added afterwards) the only warning you get is visual, by looking to the map view, after you select the corresponding symbol to show in the map setup menu.