This is the IU80 Interpolator Unit #A-2238-0720. The IU80 interpolator unit is a free-standing interface for the SP80 and SP80H. It is required for installations where the UCC2-2 daughtercard is not used. The IU80 is connected to the probe by the machine cable. The output of the IU80 is then transferred either to the CC6, or alternatively to an OEM controller via a Renishaw supplied unterminated cable.