{"product_id":"6fc5372-0aa30-0ab0-840d-siemens-sl-ncu-720-3b-pn-module","title":"6FC5372-0AA30-0AB0 840D Siemens sl NCU 720.3B PN Module","description":"\u003ch2\u003eSiemens 6FC5372-0AA30-0AB0 SINUMERIK 840D sl Numerical Control Unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSiemens 6FC5372-0AA30-0AB0\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e6FC5372-0AA30-0AB0\u003c\/strong\u003e Numerical Control Unit, operates as a dedicated hardware component for multi-axis motion control and PLC execution within SINUMERIK 840D sl platforms. Driven by an Intel Core 2 T7400 2.1 GHz processor, the module directly coordinates real-time interpolation trajectories while exchanging control data across internal backplane buses and integrated communication links.\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\u003e6FC5372-0AA30-0AB0\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\u003e3.9 kg (8.60 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard SINUMERIK 840D sl NCU enclosure frame\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\u003eBackplane bus power supply (24 VDC nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Processor\u003c\/td\u003e\n\u003ctd\u003eIntel Core 2 T7400 \/ 2.1 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\u003e1 GB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNon-Volatile Memory\u003c\/td\u003e\n\u003ctd\u003e1 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntegrated PLC\u003c\/td\u003e\n\u003ctd\u003eS7-300 PLC 317-3 PN\/DP (512 KB Work Memory)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interfaces\u003c\/td\u003e\n\u003ctd\u003ePROFINET, PROFIBUS DP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Management\u003c\/td\u003e\n\u003ctd\u003eIntegrated twin fan module assembly\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 720.3B PN module utilizes high-velocity backplane bus channels to establish deterministic processing loops between the CNC engine and the embedded S7-300 PLC 317-3 PN\/DP logic controller. Industrial Ethernet and PROFINET deterministic networks handle real-time synchronization between axis drive loops and remote I\/O nodes. To prevent bus communication faults or initialization stalls, control engineers must verify matching firmware flash compatibility across both the system flash card and the active controller software partitions prior to powering up the system.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can maintenance staff replace the 6FC5372-0AA30-0AB0 module while the main subrack power is active?\u003c\/p\u003e\n\u003cp\u003eA: No, you must shut off the main 24 VDC subrack power supply before removing or inserting the unit. Hot-swapping the hardware causes electrical arcing on backplane connector contacts and risks corrupting volatile active program memory.\u003c\/p\u003e\n\u003cp\u003eQ: How does the unit retain critical machine parameters during a total line shutdown?\u003c\/p\u003e\n\u003cp\u003eA: System parameters, flag states, and zero offsets store directly inside the 1 MB non-volatile memory partition backed by an internal battery circuit, preventing data loss across prolonged unpowered states.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eSecure the NCU housing vertically into its dedicated subrack slot within the enclosure. Tighten all mechanical retaining fasteners to establish a low-impedance grounding path between the module frame and the equipment rack chassis. Ensure a minimum vertical clearance of 100 mm above and below the twin fan module to maintain adequate convection and airflow cooling.\u003c\/p\u003e\n\u003cp\u003eConnect all PROFINET and PROFIBUS DP cables using industrial-grade, double-shielded twisted-pair wiring. Secure external cable shielding to ground via low-impedance grounding clamps mounted directly near the enclosure cabinet entry point. Maintain a minimum physical isolation distance of 200 mm between communication buses and high-power AC drive motor cables to prevent high-frequency noise interference.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":43926062432355,"sku":"6FC5372-0AA30-0AB0","price":400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/236_d42b85ee-c691-4be6-8ae6-6815636a37a8.jpg?v=1767060826","url":"https:\/\/www.autocontrolglobal.com\/products\/6fc5372-0aa30-0ab0-840d-siemens-sl-ncu-720-3b-pn-module","provider":"AutoControl Global","version":"1.0","type":"link"}