Receive a Text Quote
We will send you price and availability shortly
Invalid number. Please call (800) 691-8511
Looking for a fast quote? Click here, and we'll text you.

2-year Warranty

Same Day Shipping

Siemens 6FC5357-0BB33-0AE2

Rated 5/5 on 2 reviews

Rate this product

Manufacturer: SIEMENS


PRODUCT TYPE INFO: Siemens SINUMERIK Process Control Unit

4 in stock

Ships Today

Free Shipping

2 Year warranty

Part Number6FC5357-0BB33-0AE2
Model #6FC53570BB330AE2
Warranty2 Year
DescriptionNCU module
Input20.4…28.8 V
Memory W/O System software memory: NC 2.5 MB
Software ProFibus DP
Length50 mm
Width207 mm
Hight316 mm
ProcessorPentium III

Our Repair Services

MRO Electric repairs CNCs, PLCs, Servo/Spindle Drives, Motors, Amplifiers, VFDs, HMIs, and more, most of which can be repaired in only 3-5 days.

Repair Benefits

MRO can restore your failed 6FC5357-0BB33-0AE2 to remanufactured condition and save you up to 75% compared to buying new. We offer standard repair pricing to ensure you the best value for your repair.

Our certified technicians use rigorous testing procedures to ensure your parts are restored to fully functioning condition. Our team proudly stands behind all repairs by providing a minimum 2-year warranty.

Our technicians have vast experience with most manufacturers and models. In addition to this 6FC5357-0BB33-0AE2 we also repair a wide range of other Siemens products, so if you don’t see the model you need, please contact us.

Core Exchange

If you are interested in getting credit for your faulty 6FC5357-0BB33-0AE2, just let us know, and we can issue you an RMA to send it in as an exchange. Our exchange program provides you with savings and keeps us stocked for the next time you need anything.

  • Shipping Weight : 5lbs

Want it shipped today?

  • Order within the next 5 hours and 52 minutes.
  • If you order between 4pm and 6pm EST, you will be charged a small rush fee.

Ask about exchanging your faulty 6FC5357-0BB33-0AE2 for credit when ordering from MRO Electric

MRO Electric provides a 2-year warranty on every item we sell and repair. We stand behind all of our products and guarantee them for the full 2 years. If there is an issue with any of our products within the warranty period, we will evaluate the unit and repair or replace it under warranty.

Siemens 6FC5357-0BB33-0AE2 Overview


The SINUMERIK 840D/DE NCU 6FC5357-0BB33-0AE2 is a numerical control unit designed to provide high-end control for CNC machining processes. The unit ensures precision, speed, and flexibility in complex machining tasks.


  1. Powerful Processing: Equipped with a high-performance processor, ensuring smooth operations even in multitasking environments.
  2. Modular Design: Allows for customization and scalability based on the needs of specific applications.
  3. High Memory Capacity: Adequate storage for user programs, system data, and other essential files.
  4. Integrated Safety Functions: Features integrated safety functions to ensure machine protection and operator safety.
  5. Multiple Interface Options: Equipped with various interfaces for communication with peripheral devices and integration with other systems.
  6. Real-time Operation: Offers real-time control for both machine tool and motion control applications.
  7. User-Friendly: Typically accompanied by SINUMERIK Operate, a user-friendly interface that allows for easy programming and machine operation.

Installation Guide:

  1. Select the Right Location: Choose a dry, cool place free from excessive dust and vibration. The location should also be easily accessible for maintenance.
  2. Ensure Proper Ventilation: The NCU generates heat during operation. Ensure that there's enough ventilation to prevent overheating.
  3. Connect to Power: Follow the manufacturer's guidelines regarding the voltage and current requirements. Ensure a stable power supply.
  4. Connect Peripheral Devices: Using the appropriate ports, connect peripheral devices like drives, I/O modules, and HMI displays.
  5. Grounding: Proper grounding is crucial to prevent electrical interference and to ensure safety.
  6. System Initialization: After installation, power up the unit and perform system initialization. This might include software setup, calibration, and other initial tasks.
  7. Test the System: Before starting full-scale operation, test the system for any irregularities.


The SINUMERIK 840D/DE NCU 6FC5357-0BB33-0AE2 is versatile, finding applications across a plethora of industries and machining processes:

  1. Aerospace: For precision machining of intricate components that demand tight tolerances and high-quality finishes.
  2. Automotive: Utilized in producing engine parts, gearboxes, and other critical components that require sophisticated machining.
  3. Medical Devices: Precision machining of orthopedic implants, dental instruments, and other medical apparatus.
  4. Mold & Die Making: In creating intricate molds and dies used for plastic injection or metal casting.
  5. General Machining: For any precision-oriented task from turning, and milling, to grinding operations.


  1. Enhanced Productivity: The powerful processing capabilities mean reduced cycle times and higher throughput.
  2. Precision: Achieves tight tolerances, ensuring parts manufactured are of consistent and high quality.
  3. Reliability: The SINUMERIK series is known for its reliability, minimizing downtimes, and ensuring consistent production.
  4. Integration: Easily integrates with other systems, enabling a streamlined workflow from design to production.
  5. Future-Ready: The modular design allows for future upgrades and adaptability to evolving machining technologies.

Maintenance and Troubleshooting:

  1. Regular Inspection: Periodically inspect for any signs of wear and tear, especially on the connectors and ports.
  2. Firmware Updates: Siemens regularly releases updates. Ensure the firmware is up-to-date for optimal performance and added features.
  3. Backup: Regularly back up user programs and system data. This ensures minimal disruption in case of system failures.
  4. Cleaning: Ensure the ventilation slots remain dust-free. Use compressed air to blow out any accumulated dust.
  5. Monitor Temperature: Although the unit has built-in protection against overheating, monitor its temperature, especially during peak loads.


Q: Can the SINUMERIK 840D/DE NCU 6FC5357-0BB33-0AE2 control multiple machines simultaneously?

A: While the unit is highly capable, its primary design is for controlling individual machines. For multiple machine control, a network of NCUs might be required.

Q: Is training required to operate the SINUMERIK Operate interface?

A: While the interface is user-friendly, for complex machining tasks, proper training is recommended to fully harness its capabilities.


The SINUMERIK 840D/DE NCU 6FC5357-0BB33-0AE2 stands as a testament to Siemens' expertise in CNC control technology. It seamlessly marries power with precision, ensuring top-notch performance even in the most demanding industrial settings. Whether you're involved in aerospace, automotive, or any precision-intensive sector, this unit promises to elevate the machining process to unparalleled heights.


Contact Us Today For More Information About Siemens Products

Check out the rest of our Siemens product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like 6FC5357-0BB33-0AE2, take a look at more from our Accessories line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our 6FC5357-0BB33-0AE2 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.

5 stars

4.9 Overall Satisfaction Rating

Over 1700 Ratings from Actual Customers

Read Our Reviews

Very happy with the overall service, delivery, communication and delivery,

Conley Cooke

I needed a special drive, found it, and I was quickly assisted by Joe Kaminski. Everything was exactly as it should be....


We have an older DMU80 CNC Machine and the Handheld Control was damaged beyond repair. MRO was very helpful in confirmin...

Abbey-Purchasing Specialist