Create a new artboard in portrait orientation - the banner size is displayed on the product packaging. Create your artwork with a 5mm border to mitigate feed movement. 300 DPI on this banner media equates to 2551 x 14870 pixels.
ProRIP Banner Sizing
Click the arrow next to the paper size and select Add New Media... Create a name and input dimensions equivalent to the banner size you have (and units of measurement you selected upon initial setup) then click Create.
Import & Print
Configure your ProRIP to the correct settings - Ultra Heavy 3 (217 - 256gsm). Then import your artwork: File > Import Files. Then click Print.
Print on the glossy side.
You now have awesome banners.