Siemens 6FC5250-3AX20-5AH0 Memory Card is a PC-card memory module for SINUMERIK 840D NCU572 CNC controllers, designed to be installed in the NCU572 unit of the system. It supports SINUMERIK 840D installations by providing a dedicated memory card for the NCU’s software components and machine data management. Programming the PC card requires SinuCom FFS starting with software version 6.4.13, ensuring proper formatting and reliable data handling when writing to the card. The exact part number 6FC5250-3AX20-5AH0 identifies this specific SINUMERIK memory-card module within the NCU family and its compatibility with the 840D control architecture.
