Siemens 6FC5373-0AA30-0AB0 SINUMERIK 840D sl NCU 730.3B PN
ManufacturerSiemensModel6FC5373-0AA30-0AB0Product TypeSINUMERIK 840D sl NCU 730.3B PN numerical control unit
01Key Information
Siemens 6FC5373-0AA30-0AB0 is the SINUMERIK 840D sl NCU 730.3B PN with integrated PLC 317-3 PN/DP and a twin fan module. It combines CNC, PLC, drive and communication tasks for the engineered machine configuration. The documented hardware uses 2 GB of DRAM and 1 MB of nonvolatile memory, and its replacement suitability depends on the installed CNC software, PLC project, licensed options and drive topology.
Selection ControlVerify the complete article number, hardware revision, software, interfaces, installed options and system architecture before ordering.
02Functions
Core Functions
- Coordinates CNC interpolation, PLC sequence logic and SINAMICS drive communication in a SINUMERIK 840D sl system.
- Integrates a PLC 317-3 PN/DP for the documented machine-control architecture.
- Provides 2 GB of DRAM and 1 MB of nonvolatile memory.
- Uses a twin fan module supplied with the NCU for the documented cooling arrangement.
- Supports PROFINET and PROFIBUS functions defined by the installed machine project.
- Operates from a 24 V DC supply within the stated cabinet environment.
Product Identity
- Manufacturer: Siemens
- Model: 6FC5373-0AA30-0AB0
- Product Type: SINUMERIK 840D sl NCU 730.3B PN numerical control unit
- Status: Phase-out announced since October 1, 2023; available as spare part
03Specifications
| Manufacturer | Siemens |
|---|---|
| Article Number | 6FC5373-0AA30-0AB0 |
| Product Designation | SINUMERIK 840D sl NCU 730.3B PN |
| Integrated PLC | PLC 317-3 PN/DP |
| Rated Supply | 24 V DC |
| Maximum Power | 352 W |
| Typical Power Loss | 24 W |
| DRAM | 2 GB |
| Nonvolatile Memory | 1 MB |
| Fan Module | Twin fan module included |
| Degree of Protection | IP20 / UL open type |
| Operating Temperature | 0 to 55 degrees C |
| Transport Temperature | -40 to 70 degrees C |
| Storage Temperature | -25 to 55 degrees C |
| Relative Humidity | 5 to 95 percent |
04Installation
- Match the exact NCU article, hardware status and CNC software baseline to the installed machine.
- Back up CNC, PLC, drive, tool, option and machine data before disconnecting the original unit.
- Record every PROFINET device name, IP address, PROFIBUS address, topology and cabinet connection.
- Check the twin fan module, air path, 24 V DC supply and protective-ground arrangement.
- Verify license and memory-media handling before transferring any machine-specific data.
- Commission the replacement through controlled archive restoration followed by axis, spindle, drive, PLC, I/O, network and safety validation.
05Lifecycle
- Siemens announced phase-out for this article from October 1, 2023 and identifies it as available only as a spare part.
- Replacement planning must account for the installed CNC software baseline; Siemens gives a successor note tied to CNC software V2.7 SP3 HF10 and PLC 317-3 PN/DP.
- Do not select another NCU only from the enclosure or connector pattern.
- Preserve license records, option data and the full machine archive with the hardware identification.
- For modernization, review the NCU, drives, operator components, PLC program and machine acceptance plan together.
