Siemens 6FC5357-0BB11-0AE0 is the Numeric Control Unit (NCU) CPU module for SINUMERIK 840D/DE, providing the central processing core of the machine’s control system (NCU 571.2). It uses an Intel 486 DX4 processor at 100 MHz, with NC memory of 0.5 MB and PLC memory of 96 KB PREP, shipped without system software. The unit supports MPI/DP RS-485 and PROFIBUS-DP communications, plus OPI/MPI/S7-300 and Drive/Device Bus interfaces, and includes a PCMCIA card slot along with two probes and two handwheels. Weight is about 0.68 kg and power consumption (loss) around 33 W.
