Kone KCM card reader

Have a customer wanting to had a card reader to a duplex front and rear. Kone KCM831..would it be easier to use the car expansion board in the cop or the LCEOPT board in the controller. And how many floors can one board lock out? Thanks for any tips

On the option board you set J9 to front ore Rear, The opt board has 8 input. If you need some dokument just write