Siemens 6FC5371-0AA30-0AB0 NCU 710.3B PN Numerical Control Unit
A spare SINUMERIK 840D sl control unit integrating CNC, PLC and PROFINET/PROFIBUS functions.
Product Overview
6FC5371-0AA30-0AB0 is the NCU 710.3B PN for SINUMERIK 840D sl. It combines numerical-control processing with an integrated PLC 317-3 PN/DP and is supplied with the twin fan/battery module and battery.
The article is now a spare part, so replacement planning must preserve the machine archive, CompactFlash content, licenses and network configuration.
Performance
- Integrated CNC and PLC processing for the 840D sl control architecture.
- PROFINET and PROFIBUS connectivity for machine I/O, drives and operator components.
- Nonvolatile memory for control data retention with a separate DRAM working area.
- Twin fan/battery assembly included for the documented control-unit construction.
Technical Details
| Manufacturer | Siemens |
|---|---|
| Article Number | 6FC5371-0AA30-0AB0 |
| Control Family | SINUMERIK 840D sl |
| Product Designation | NCU 710.3B PN |
| Integrated PLC | SIMATIC S7-317-3 PN/DP |
| Rated Input | 24 V DC |
| Maximum Power Consumption | 281 W |
| Power Loss | 21 W |
| Working Memory | 2 GB DRAM |
| Nonvolatile Memory | 1 GB NVM |
| Degree of Protection | IP20 / UL open type |
| Product Status | Spare part; cancelled since October 2025 |
System Integration
- Create separate NC, PLC and drive archives plus a verified CompactFlash image before removal.
- Retain license keys and card identity with the machine documentation.
- Restore device names, IP addresses, fieldbus topology and safety configuration under change control.
- Verify the included fan/battery module and cabinet airflow during installation.
Applications
- Service replacement in SINUMERIK 840D sl machine tools.
- CNC systems using the integrated PLC and distributed PROFINET/PROFIBUS devices.
- Lifecycle support where the original control software and machine archive remain available.
FAQ
What must be backed up before replacing 6FC5371-0AA30-0AB0?
Create validated NC, PLC, drive and HMI archives, copy the storage medium and retain all license information.
Can another NCU 710 revision directly replace 6FC5371-0AA30-0AB0?
Only after Siemens compatibility, memory, firmware, interfaces and machine software have been checked for the full suffix.
Which network records are needed for 6FC5371-0AA30-0AB0?
Save PROFINET names and addresses, PROFIBUS node data, drive topology and external-controller links.
Does 6FC5371-0AA30-0AB0 include the fan and battery hardware?
The documented spare includes the twin fan/battery module and battery; verify the delivered assembly against the order.
How should 6FC5371-0AA30-0AB0 be commissioned after exchange?
Restore archives in the approved sequence, then test axes, PLC I/O, safety functions, HMI and communication links.
What lifecycle risk applies to 6FC5371-0AA30-0AB0?
Spare availability is finite, so operators should maintain backups and plan a separate machine-control migration strategy.
Recommended Models
| 2CDG110040R0011 | OCM-DPR-85-PD-ST-ACV | E34TB120H3X |
| Norgren 9710315205100000 | N08002-4111-000-00 | S3-SN-R |
| 8B0C0160HC00.001-1 | QND-6082R | B&R NT11 MDNT11-0 |
| Mosaic M1 8040430 | IZMX-ST230AD-1 | IN1508 |
| DNC-50-25-PPV-A | Siemens 3VL1103-1KM30-0AA0 | 3G3JV-A2007 |
| WPLE060-007-SSSA3AD-Y9/23/40/63/B5/M4 | Siemens 6SL3710-1GF31-8AA3-Z | 2094-PRS1 |
| 300i SF 100 50116205 | 6ES5420-5AA11 | Lenze MDSKABS11222 |
| 802T-DD | Ve 2424 D/C 17215 | AC110 |
| PF2A750F0267 | PDP67 F 8DI ION HP 773601 | DSQC 315 |
| Siemens, 1PH8107-1CM22-3MA1-Z | Lenze MCA19S35-RS0F3-Z0G0-ST5F30N-R0SU | RS2-TX |
