Provides the mechanical carrier and guided enclosure for the supported NCU module.
Product Identification
6FC5247-0AA00-0AA3 is the Siemens SINUMERIK 840D/DE NCU box. It is the module carrier and enclosure for the listed NCU generations and includes the power supply unit, battery and fan assembly.
The NCU box contains the rack and cable-distribution structure plus guide rails for the NCU and service assemblies. The installed NCU variant and all retained data remain separate compatibility items.
Engineering Data
| Manufacturer | Siemens |
|---|---|
| Exact article number | 6FC5247-0AA00-0AA3 |
| Product type | SINUMERIK 840D/DE NCU box |
| Included service elements | Power supply unit, battery and fan |
| Supported NCU groups | NCU 561.2/.3/.4/.5; 571/571.2/.3/.4/.5; 572/572.2/.3/.4/.5; 573.2/.3/.4/.5 |
| Construction | NC rack with cable distributor and sheet-metal enclosure |
| Lifecycle status | Product cancellation |
| EAN | 4025515019879 |
| UPC | 040892739053 |
| Country of origin | Germany |
| RoHS status | Not RoHS-compliant |
| Quantity unit | 1 piece |
| Dangerous-goods handling | Yes — follow the applicable transport report |
Functions
Distributes the internal cable connections required by the NCU rack arrangement.
Houses the power, battery and fan service components included in the article.
Maintains the physical system boundary between the NCU, rack and surrounding SINUMERIK installation.
Applications
- Service replacement in documented SINUMERIK 840D/DE controls using one of the listed NCU variants.
- Restoration of an enclosure with damaged power, battery, fan, rack or cable-distribution hardware.
- Machine-tool maintenance where the existing NCU and control data are retained or migrated under the approved procedure.
- Legacy spare planning that requires the exact NCU-box article rather than a later SINUMERIK platform.
Lifecycle
- Siemens lists 6FC5247-0AA00-0AA3 with product cancellation status, so service availability must be checked per enquiry.
- Record the installed NCU number, software state, battery condition, fan arrangement and all cable positions.
- Preserve machine data, PLC data and archives independently of the enclosure exchange.
- Use the dangerous-goods transport instructions applicable to the battery-containing assembly.
About IndustryParts
https://www.industryparts.com/NCU-box support keeps enclosure and control data separate
IndustryParts prepares 6FC5247-0AA00-0AA3 enquiries with the installed NCU, included service hardware and archive status clearly identified.
- Supported NCU recorded
- Battery and fan state reviewed
- Machine archives requested
FAQ
Does 6FC5247-0AA00-0AA3 include an NCU processor module?
Siemens describes it as the NCU enclosure with power supply, battery and fan; identify the required NCU separately.
Which installed identity is most important before ordering 6FC5247-0AA00-0AA3?
Provide the exact NCU 561/571/572/573 variant, enclosure label, machine-control release and photographs of every internal connection.
Can a newer SINUMERIK enclosure directly replace this NCU box?
Not without a documented migration plan because the NCU generation, rack, wiring, power and software architecture can differ.
Why must machine archives be secured before changing 6FC5247-0AA00-0AA3?
The enclosure replacement can disturb power, battery and NCU connections; separate backups protect machine and PLC data.
What checks are required after installing the replacement NCU box?
Verify power rails, fan operation, battery status, NCU startup, PLC/NC data, communications and an approved machine-function test.
