6FC5357-0BB23-0AE0 Siemens Control Unit
Manufacturer: Siemens
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Part Number: 6FC5357-0BB23-0AE0
Condition：New with Original Package
Product Type: Numerical Control Units
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Siemens 6FC5357-0BB23-0AE0 SINUMERIK 840D/DE Numerical Control Unit
The Siemens 6FC5357-0BB23-0AE0, also cataloged as the 6FC5357-0BB23-0AE0 Numerical Control Unit, operates as a dedicated hardware component for multi-axis trajectory calculation and integrated logic control within SINUMERIK 840D/DE CNC subracks. Driven by an Intel Celeron M 600 MHz processor, the hardware directly executes high-speed motion commands while interfacing with an onboard S7-300 PLC core via local backplane channels.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 6FC5357-0BB23-0AE0 |
| Brand | Siemens |
| Origin | Germany |
| Weight | 1.55 lbs (0.70 kg) |
| Dimensions | Standard SINUMERIK 840D NCU module enclosure |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | Backplane supplied (24 VDC nominal system bus) |
| Core Processor | Intel Celeron M / 600 MHz |
| NC Memory | 3 MB |
| DRAM Memory | 128 MB |
| SRAM Memory | 8 MB |
| Integrated PLC | S7-300 PLC 317-2 DP (128 KB Work Memory) |
| Communication Interfaces | PROFIBUS DP (prepared) |
| Functional Safety | IEC 61508 compliant |
Siemens Fieldbus and Backplane Determinism
The NCU 572.3E hardware leverages high-bandwidth backplane bus communications to maintain strict cyclic execution between the numerical control core and the embedded S7-300 PLC 317-2 DP subsystem. Networked automation topologies utilize PROFIBUS DP interface protocols to yield deterministic axis synchronization and low-latency I/O updates. To maintain real-time operational balance, technicians must confirm firmware flash compatibility across the internal PLC partition and system PC card before executing multi-axis interpolation routines.
Frequently Asked Questions
Q: Can the 6FC5357-0BB23-0AE0 be extracted from the subrack during live system operation?
A: No, engineers must remove all 24 VDC control power from the drive subrack before disengaging the module. Hot-swapping damages internal backplane bus contacts and risks corrupting active programs saved in the 8 MB SRAM partition.
Q: What maintains the motion programs stored in SRAM during a total power shut down?
A: An internal backplane backup battery powers the 8 MB volatile SRAM array when primary input voltage drops. You must replace this battery at recommended maintenance intervals to avoid losing zero offsets and machine parameter tables.
Field Installation Guidelines
Mount the unit directly into its assigned slot within the SINUMERIK 840D subrack, ensuring mechanical retention screws seat tightly to maintain solid earth grounding across the frame. Allow a clear vertical clearance zone of at least 100 mm above and below the module assembly to ensure unimpeded natural airflow through the internal heat sink structure.
Route all PROFIBUS DP fieldbus links through double-shielded twisted-pair cables. Ground the outer braid shield at both ends using low-impedance grounding clamps positioned close to the cable entry points. Keep all communication and low-voltage feedback lines separated by a minimum physical distance of 200 mm from three-phase motor leads and power conductors to prevent capacitive noise coupling.