@CMUK max legacy extension for NS500-main unit is 34 ( without DXDP) , 2 dig + 16 analog (on main board) + 16 (analog/digital) or 8+8 (analog/digital)
max legacy extension for NS700-main unit is 38 ( without DXDP) , 2 dig + 4 analog (on main board) + 16 (analog/digital) + 16 (analog/digital)
There are no stupid questions, there are only stupid answers!