How many ACC-24E2S could PPmac most support?

[dzrong]

How many ACC-24E2S could PPmac most support if using ACC-R3,we know ACC-R3 has 18 slot,except the one PPmac CPU using,there are 17 slot,and one ACC-24E2S will only take one,so can we use 17 ACC-24E2S in rack with PPmac? So there will be 68 axis in a rack? Thanks