Description
The Siemens SINUMERIK 840D sl NCU 720.2 (6FC5372-0AA00-0AA2) is a numerical control unit for the SINUMERIK 840D sl system: mid-range NCU 720.2 with integrated SIMATIC PLC 317-2DP, 512 MB DRAM and 1 MB SRAM, hardware revision 2 (later production state of the -0AA1 unit). It works with SINAMICS S120 drives over DRIVE-CLiQ and runs the NC kernel, PLC program and axis interpolation. At JJ Automation it is available new and as tested used / refurbished — checked before dispatch and backed by warranty.
When to replace
Control not booting, watchdog or NCK system alarms, corrupted SRAM / CF card data, repeated battery-backup failures, or physical damage after a power event. Before swapping: back up your machine data, PLC program and drive parameters — a control unit without this machine's own data cannot run it. Our free guides: SINUMERIK backup guide · 840D alarm list · referencing after a control change.
Details
| Part Number | 6FC5372-0AA00-0AA2 |
| Model | NCU 720.2 |
| System | SINUMERIK 840D sl |
| Type | Numerical Control Unit (NCU) |
| Integrated PLC | SIMATIC 317-2DP |
| Memory | 512 MB DRAM, 1 MB SRAM |
| Hardware revision | -0AA2 |
| Brand | Siemens |
| Condition | New & Used / Refurbished |
Need this part? Get a quote today.
Call or WhatsApp +91 88022 12394 — we ship across India and worldwide. Repair and exchange options are also available for Siemens SINUMERIK systems.
Related: SINUMERIK controllers & panels · Siemens PCB boards · SINAMICS / SIMODRIVE drives
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