Siemens 6FC5247-0AA00-0AA2 is the SINUMERIK 840D/DE NCU Box, a base enclosure that provides mounting and electrical interfaces for the CNC system’s NCU modules. It supports installation of NCU modules 561.2/561.3/561.4, 571/571.2/571.3/571.4, 572/572.2/572.3, and 573.2/573.3/573.4/573.5, and includes a power unit, battery, and cooling fan for integrated operation. The model is listed as no longer available.
