Siemens 6FC5372-0AA00-0AA2 840D sl NCU 720.2 CNC Module
Manufacturer: Siemens
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Part Number: 6FC5372-0AA00-0AA2
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 6FC5372-0AA00-0AA2 SINUMERIK 840D sl Numerical Control Unit
The Siemens 6FC5372-0AA00-0AA2, also cataloged as the 6FC5372-0AA00-0AA2 Numerical Control Unit, operates as a dedicated hardware component for multi-axis motion control and PLC automation within SINUMERIK 840D sl platforms. Driven by an Intel Celeron M 1.2 GHz processor, the unit directly executes interpolation routines and coordinating control logic across internal system buses and fieldbus networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 6FC5372-0AA00-0AA2 |
| Brand | Siemens |
| Origin | Germany |
| Weight | 3.64 lbs (1.65 kg) |
| Dimensions | Standard SINUMERIK 840D sl NCU frame dimensions |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | Backplane bus power supply (24 VDC nominal) |
| Core Processor | Intel Celeron M / 1.2 GHz |
| NC Memory | 3 MB |
| DRAM Memory | 256 MB |
| Non-Volatile Memory | 1 MB |
| Integrated PLC | S7-300 PLC 317-2 DP (512 KB Work Memory) |
| Communication Interfaces | PROFIBUS DP, Industrial Ethernet |
Siemens Fieldbus and Backplane Determinism
The NCU 720.2 leverages deterministic Profinet and Industrial Ethernet communication channels alongside PROFIBUS DP protocols to link CNC drive axes with distributed I/O nodes. High-speed backplane bus architectures handle data transfers between the central CNC engine and the onboard S7-300 PLC core without processing delay. Systems engineers must confirm strict firmware flash compatibility between the system memory card and active controller partitions before executing system boots to avoid bus cycle timeouts.
Frequently Asked Questions
Q: Is live hot-swapping supported for the 6FC5372-0AA00-0AA2 module during subrack operation?
A: No, engineers must disconnect all primary 24 VDC subrack power prior to extracting or inserting the module. Disengaging the unit while powered risks damaging edge connector contacts and corrupting parameters in the 1 MB non-volatile memory partition.
Q: How does the NCU preserve machine positions and program data during an unexpected power interruption?
A: The module relies on its integrated 1 MB non-volatile memory and system battery backup circuit to retain offset values, flag states, and system parameters across complete power loss events.
Field Installation Guidelines
Position the module in its dedicated subrack slot within the main cabinet enclosure, tightening all mechanical grounding screws to ensure a solid, low-impedance frame ground. Maintain a minimum vertical clearance gap of 100 mm above and below the assembly to support unhindered heat dissipation through natural convection.
Utilize double-shielded twisted-pair cabling for all PROFIBUS DP lines, securing the cable shields directly to earth ground with grounding clamps immediately at the enclosure entry point. Maintain a minimum physical distance of 200 mm between communication buses and high-power AC motor lines to prevent electromagnetic noise coupling.