Description
The Siemens SINUMERIK 840D NCU 571 (6FC5357-0BA10-0AE0) is a numerical control unit for the SINUMERIK 840D / 840DE system: first-generation (1994–1998, pre-powerline) 840D NCU 571 — entry-level class unit with integrated SIMATIC PLC 314, for 840D / 840DE machines with up to 6 axes / 2 channels; order variant -0BA10-0AE0 (first release). Supplied for repair-exchange of early 840D systems where the original NCU is no longer available from Siemens. It plugs into the NCU box alongside the SIMODRIVE 611D drive rack 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 | 6FC5357-0BA10-0AE0 |
| Model | NCU 571 |
| System | SINUMERIK 840D / 840DE |
| Type | Numerical Control Unit (NCU) |
| Integrated PLC | SIMATIC 314 |
| Configuration | max. 6 axes, 2 channels |
| Generation | First-generation 840D (pre-powerline) |
| 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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