{"product_id":"siemens-6fc5357-0bb35-0ab0-sinumerik-840d-ncu-573-5b-cnc","title":"Siemens 6FC5357-0BB35-0AB0 SINUMERIK 840D NCU 573.5B CNC","description":"\u003ch2\u003eSiemens 6FC5357-0BB35-0AB0 SINUMERIK 840D\/DE Numerical Control Unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSiemens 6FC5357-0BB35-0AB0\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e6FC5357-0BB35-0AB0\u003c\/strong\u003e Numerical Control Unit, operates as a dedicated hardware component for multi-axis motion control and PLC execution within SINUMERIK 840D\/DE system architectures. Powered by an Intel Pentium M 1.4 GHz processor, the unit directly executes complex trajectory algorithms while interfacing with an integrated S7-300 PLC core across internal communication lines.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6FC5357-0BB35-0AB0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3.64 lbs (1.65 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard SINUMERIK 840D NCU subrack enclosure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eSystem backplane supplied (24 VDC nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Processor\u003c\/td\u003e\n\u003ctd\u003eIntel Pentium M \/ 1.4 GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNC Memory\u003c\/td\u003e\n\u003ctd\u003e3 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDRAM Memory\u003c\/td\u003e\n\u003ctd\u003e128 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSRAM Memory\u003c\/td\u003e\n\u003ctd\u003e8 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntegrated PLC\u003c\/td\u003e\n\u003ctd\u003eS7-300 PLC 317-2 DP (128 KB Work Memory)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interfaces\u003c\/td\u003e\n\u003ctd\u003ePROFIBUS DP (prepared)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Standard\u003c\/td\u003e\n\u003ctd\u003eIEC 61508 compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSiemens Fieldbus and Backplane Determinism\u003c\/h3\u003e\n\u003cp\u003eThe NCU 573.5B module utilizes high-velocity backplane bus communication channels to establish deterministic synchronization between the numerical control core and the embedded S7-300 PLC 317-2 DP engine. Networked I\/O points and external drives transfer high-speed control data via PROFIBUS DP interface protocols. Engineers must verify firmware flash compatibility across both the system flash card and the active PLC CPU partition prior to commissioning to avoid bus communication timeouts during initial boot cycles.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Is hot-swapping supported for the 6FC5357-0BB35-0AB0 module during active subrack operation?\u003c\/p\u003e\n\u003cp\u003eA: No, you must completely disconnect the main 24 VDC subrack power supply before removing or inserting the NCU module. Pulling the module while energized causes backplane signal interruptions and risks corrupting volatile parameters stored in internal SRAM.\u003c\/p\u003e\n\u003cp\u003eQ: How does the NCU retain program data during an external power failure?\u003c\/p\u003e\n\u003cp\u003eA: The onboard 8 MB SRAM retains active machine data and NC parameters via a backplane battery backup circuit. You must routinely verify battery voltage levels to ensure persistent data integrity during prolonged power outages.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the unit firmly into its designated slot within the SINUMERIK 840D rack assembly. Tighten all mechanical locking fasteners to provide a low-impedance ground path between the module frame and the subrack chassis. Maintain a minimum vertical clearance of 100 mm above and below the module enclosure to allow adequate heat dissipation across the passive cooling surfaces.\u003c\/p\u003e\n\u003cp\u003eConnect PROFIBUS DP network interfaces using double-shielded twisted-pair cables. Secure cable shields directly to ground using grounding clamps positioned near the enclosure cable entrance. Route all communication lines separately from high-voltage motor power leads, maintaining a minimum clearance distance of 200 mm to suppress electromagnetic interference.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":43926076227683,"sku":"6FC5357-0BB35-0AB0","price":400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/238_f94ac8f4-112b-4172-b988-1b2e3caa1752.jpg?v=1767061798","url":"https:\/\/www.autocontrolglobal.com\/products\/siemens-6fc5357-0bb35-0ab0-sinumerik-840d-ncu-573-5b-cnc","provider":"AutoControl Global","version":"1.0","type":"link"}