Siemens 6FC5247-0AA00-0AA2 Simodrive Servo Drive

The Siemens 6FC5247-0AA00-0AA2 is an NCU base unit (NCU Box) for the SINUMERIK 840D/DE CNC platform, serving as the chassis that houses the Numerical Control Unit modules and provides the mechanical and electrical interface to the drive system. It is designed to accept NCU modules from the 561.x, 571.x, 572.x, and 573.x families and supports the associated power unit, battery, and cooling fan required for operation, enabling compact, integrated installation inside a machine cabinet. Used in retrofit or replacement scenarios for 840D-based machinery, the NCU Box ensures proper mounting and interconnection of the CNC control electronics, linking the NCU modules to the main SINUMERIK control and the drive network for coordinated motion. Some listings identify it as NCU-BOX 13A, and Siemens catalogs note that this product is no longer available, with remaining stock found through third-party refurbishers.