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Siemens 6FC5373-0AA30-0AB0

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Part Number6FC5373-0AA30-0AB0
Model #6FC53730AA300AB0
Warranty2 Year
NCU730.3B PN
Supply 24 V, 6A

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 6FC5373-0AA30-0AB0 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 6FC5373-0AA30-0AB0 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 6FC5373-0AA30-0AB0, 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.

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Ask about exchanging your faulty 6FC5373-0AA30-0AB0 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 6FC5373-0AA30-0AB0 Overview


SINUMERIK 840D sl is an integrated digital system that offers maximum performance and flexibility for complex multi-axis systems. It is a complete system that is integrated into the SINAMICS S120 drive system and supplemented by the SIMATIC S7-300 automation system, making it ideal for the mid-sized and large power range. This system provides uniform openness from operation up to the NC core, ensuring optimum integration into networks. Additionally, it has a uniform structure in terms of operation, programming, and visualization, making it easy to use. Safety is a top priority, and the system includes integrated safety functions for both the operator and the machine. To support production, it offers operating and programming software such as ShopMill or ShopTurn, as well as Motion Control Information System Products (MCIS-Products).


The SINUMERIK 840D sl has a broad range of applications and can be utilized globally in various industries. It is ideal for use in tool and mold making, high-speed cutting operations, processing of wood and glass, handling operations, transfer lines, and rotary indexing machines, and in both mass production and JobShop production environments. Its versatility and advanced features make it a sought-after solution for many industries.

System configuration

The Numerical Control Unit (NCU) integrates various functions including NCK, HMI, PLC, closed-loop control, and communication tasks into a single unit. This integration allows for efficient and streamlined control of the manufacturing process, making it easier to manage and monitor. The NCU provides a comprehensive solution for numerical control and communication tasks, making it an essential component of modern manufacturing systems.

The control unit of the SINUMERIK system is highly customizable and flexible, allowing for the attachment of various components to meet the needs of a particular application. Some of the components that can be attached to the control unit include the SINUMERIK operator panel front with TCU/PCU 50.3 and machine control panel/pushbutton panel, the SIMATIC CE panel, handheld units, and SIMATIC S7-300 I/O. Communication with other devices is possible through the PROFIBUS-DP connection for distributed PLC I/O. For programming purposes, a programming device can be attached. The control unit is also compatible with the SINAMICS 120 drive system and a range of motors including 1FK/1FT/1FN/1FW6/1PH/1FE1/2SP1/1LA. This compatibility and the ability to attach various components make the SINUMERIK control unit a highly adaptable solution for manufacturing and automation applications.

The SINUMERIK NCU system has a wide range of applications and can handle various levels of performance requirements. The NCU 710 can accommodate up to 6 axes, while the NCU 720/730 can increase the number of axes to 31 or increase the performance of the drive controller by using the NX10/15 module. It is possible to expand the NCU 720/730 by up to 6 NX10/15 modules, providing additional performance and support for more axes. For applications that require even more axes and channels, such as rotary indexing or multispindle machines, the control units can be combined and significantly extended through the use of the CBE 30 option module (available soon). The NCU 730 is recommended for applications that require maximum dynamics and accuracy, such as in mold-making or high-speed cutting operations.

FeatureNCU 720.1/730.1
DRIVE CLiQ ports6
AxesUp to 31
NX10/15Up to 6

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 6FC5373-0AA30-0AB0, 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 6FC5373-0AA30-0AB0 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.

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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...

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