{"product_id":"siemens-6fc5357-0bb34-0ae0-numerical-control-unit","title":"Siemens 6FC5357-0BB34-0AE0 Numerical Control Unit","description":"\u003cdiv\u003e\u003cp\u003eSiemens 6FC5357-0BB34-0AE0 is the NCU573.4 numerical control unit for the SINUMERIK 840D\/DE CNC family, identified by the MLFB code 6FC5357-0BB34-0AE0. This central module performs the core CNC functions for SINUMERIK 840D\/DE installations, coordinating motion control, PLC logic, and machine I\/O within compatible 840D configurations. Siemens documentation consistently references the NCU 573.4 with this exact MLFB in SINUMERIK 840D upgrade and maintenance materials, underscoring its role as the control unit that interfaces with drives, feedback, and spindle control in older SINUMERIK 840D\/DE systems. Authorized distributors and resellers list 6FC5357-0BB34-0AE0 as the replacement NCU module for 840D\/DE setups, reflecting its status as a legacy but still in-use control component for machine tools that require SINUMERIK 840D hardware.\u003c\/p\u003e\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46268602646762,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-018.png?v=1788727429","url":"https:\/\/gtghardware.com\/products\/siemens-6fc5357-0bb34-0ae0-numerical-control-unit","provider":"GTG Hardware","version":"1.0","type":"link"}