Hardware upgrade MDS9710

How many more  48 port 32 gbps fibre Channel modules can be installed in a 9710 chassis with

DS648-1536k9 qty 6

DS-X97-SF1-K9 qty 2

DS-X9710-FAB1 qty 6

DS-CAC97-3kw qty 6

DS-C9710-FAN qty 3

Can I add 2 more 48 port cards or just 1 ?