Siemens 6FC5373-0AA01-0AA2 SINUMERIK 840D sl NCU 730.2 PN CNC Hardware
01Product Profile
Siemens 6FC5373-0AA01-0AA2 is SINUMERIK 840D sl NCU 730.2 PN CNC hardware with an integrated PLC 319-3PN/DP. The spare-part control provides 3 MB of CNC user memory and 512 KB of PLC user memory and uses internal heat dissipation. Official Siemens hardware and safety records identify the exact article as the PN/DP version of NCU 730.2, distinguishing it from the NCU 730.2 article with PLC 317-2DP and from later NCU 730.3 products.
02Technical Data
| Manufacturer | Siemens |
|---|---|
| Article Number | 6FC5373-0AA01-0AA2 |
| Product Family | SINUMERIK 840D sl |
| Product Designation | NCU 730.2 PN |
| Component Type | CNC hardware / numerical control unit |
| Integrated PLC | PLC 319-3PN/DP |
| CNC User Memory | 3 MB |
| PLC User Memory | 512 KB |
| Network Designation | PN/DP |
| Heat Dissipation | Internal |
| Generation | NCU 7x0.2 |
| Commercial Position | Spare part |
03System Role
Control Function
- Executes high-performance CNC functions in a compatible SINUMERIK 840D sl installation.
- Runs integrated PLC 319-3PN/DP logic for machine sequencing and distributed automation.
- Coordinates the configured drive system, field I/O, operator interface and PN/DP communications.
- Provides the NCU 730.2 PN memory and internal-cooling design required by the installed system.
- Acts as a spare-part core for machines that retain the NCU 7x0.2 hardware and software generation.
Key Capabilities
- Combines SINUMERIK 840D sl CNC processing with an integrated PLC 319-3PN/DP.
- Three megabytes of CNC user memory support the documented NCU 730.2 PN platform.
- The integrated PLC provides 512 KB of user memory.
- The PN/DP designation identifies combined PROFINET and PROFIBUS capability for the exact variant.
- Internal heat dissipation defines the installation and cabinet-cooling arrangement.
- Official Siemens hardware records separate this NCU 730.2 PN article from NCU 730.2 with PLC 317-2DP and from NCU 730.3 generations.
04Compatibility
- Match the complete 6FC5373-0AA01-0AA2 order number and NCU 730.2 PN designation.
- Confirm CNC software, CompactFlash card, licenses, PLC project, machine archive and drive data.
- Verify PLC 319-3PN/DP configuration, PROFINET device names and addresses, PROFIBUS parameters and termination.
- Retain the documented NCU 7x0.2 terminal assignment; later NCU 7x0.3 hardware uses different assignments in relevant areas.
- Confirm internal heat dissipation, mounting clearances and cabinet airflow.
- Do not replace it with NCU 730.2 DP-only or NCU 730.3 hardware without a complete migration and validation plan.
05Applications
- Spare-part replacement in compatible SINUMERIK 840D sl NCU 730.2 PN systems.
- CNC machines requiring an integrated PLC 319-3PN/DP control architecture.
- Restoration of combined NC, PLC, drive and PN/DP communication after an NCU fault.
- Lifecycle stocking for installed NCU 7x0.2 control systems.
- Service work where the exact CNC and PLC user-memory levels must be preserved.
- Migration assessment based on a complete backup of software, licenses, NC, PLC, drive, HMI and safety data.
06FAQ
What is Siemens 6FC5373-0AA01-0AA2?
It is SINUMERIK 840D sl NCU 730.2 PN CNC hardware with an integrated PLC 319-3PN/DP.
How much user memory is identified?
The official product description states 3 MB of CNC user memory and 512 KB of PLC user memory.
What does the PN designation indicate?
The exact variant uses the PLC 319-3PN/DP platform and is identified for PN/DP communication.
Which cooling method is specified?
Siemens identifies internal heat dissipation for this article.
Is it the same as NCU 730.3 PN?
No. NCU 730.3 belongs to a later generation and uses a different full order number and system design.
What must be tested after replacement?
Validate CNC and PLC startup, software and archive restoration, drives, PN/DP networks, I/O, HMI, diagnostics and all safety functions.
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