6FC5247-0AA00-0AA2 Siemens SINUMERIK 840D/DE NCU Box with Power Unit, Battery and Fan
The Siemens 6FC5247-0AA00-0AA2 is the SINUMERIK 840D/DE NCU box: the housing that holds the Numerical Control Unit (NCU) of a SINUMERIK 840D or 840DE CNC system. Siemens supplies it complete with integrated power unit, battery and fan. It mounts the NCU into the SIMODRIVE 611 drive line-up and supplies, buffers and cools the control electronics. A failed NCU box can stop the whole machine tool, so this is a key spare part for keeping 840D machines in production.
Compatible NCUs (Siemens)
The 6FC5247-0AA00-0AA2 is designed to hold the following SINUMERIK 840D/DE NCUs:
| NCU family | Versions |
|---|---|
| NCU 561 | 561.2 / 561.3 / 561.4 |
| NCU 571 | 571 / 571.2 / 571.3 / 571.4 |
| NCU 572 | 572 / 572.2 / 572.3 |
| NCU 573 | 573.2 / 573.3 / 573.4 / 573.5 |
6FC5247-0AA00-0AA2 Key Data
| Specification | Value |
|---|---|
| Product | SINUMERIK 840D/DE NCU box |
| Control system | SINUMERIK 840D / 840DE |
| Integrated components | Power unit, battery, fan |
| Function | Housing, power supply, data buffering and cooling for the NCU |
Version History
| Order number | Description |
|---|---|
| 6FC5247-0AA00-0AA1 | NCU box for NCU 571/571.2/572/572.2/573, incl. power supply unit, battery and fan (predecessor) |
| 6FC5247-0AA00-0AA2 | NCU box for NCU 561.2 to 573.5, with power unit, battery and fan |
| 6FC5247-0AA00-0AA3 | Successor version of the SINUMERIK 840D/DE NCU box |
The 0AA2 supports a wider range of NCU versions than the earlier 0AA1. When replacing an NCU box, check the NCU type installed in your machine and the version (letter) on the existing box’s rating plate.
Why Replace the NCU Box Like-for-Like
- Restores machine availability after a power unit or fan failure in the NCU box
- No change to the NCU or software: the existing NCU, with its data, transfers into the replacement box
- Integrated battery and fan: supports data buffering and cooling of the control electronics
- Broad compatibility across the NCU 561, 571, 572 and 573 families
Buy the 6FC5247-0AA00-0AA2 Siemens from Atlantech Drives
Atlantech Drives specialises in sourcing discontinued and hard-to-find Siemens SINUMERIK and SIMODRIVE spare parts for CNC users worldwide, with fast shipping. We also supply SINUMERIK 840D NCUs such as the NCU 572.3 (6FC5357-0BB22-0AE0). Contact our commercial team for availability, condition options, pricing and lead time on the 6FC5247-0AA00-0AA2. Request your quote today.
