Siemens 6FC5357-0BB33-0AE3 is the SINUMERIK 840D/DE NCU 573.3 Numeric Control Unit that serves as the CPU for SINUMERIK 840D CNC systems. It uses a 650 MHz Pentium III processor and carries 64 MB of memory, with CNC user memory of 2.5 MB and PLC memory of 96 KB; the module is shipped without system software memory and is prepared for PROFIBUS DP communication. The 6FC5357-0BB33-0AE3 variant is designed for installation as the central control core in multi-axis turning and milling machines running SINUMERIK 840D software, and is supplied without a fan box to support compact panel or cabinet configurations.
