Upgrades the built-in cascade controller to control multiple pumps- easy to mount via plug ‘n’ play- More advanced pump control in master / follower mode- Up to 6 pumps in standard cascade control- Up to 5 pumps in master / follower setupThis MCO option, sits in a B option space.Danfoss can offer help with programming / setting up MCO options.Contact Danfoss for advice and prices.Product group: R