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2-year Warranty

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Siemens 6SL3040-0MA00-0AA1

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DESCRIPTION: S120 Control Unit CU320, without CF Card


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2 Year warranty

Part Number6SL3040-0MA00-0AA1
Model #6SL30400MA000AA1
Warranty2 Year
Control unitCU320
Ambient Temp0…55°C
Power supply24 VDC 6.5 A
Output24 VDC 0.5 A
CF card Without

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Repair Benefits

MRO can restore your failed 6SL3040-0MA00-0AA1 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 6SL3040-0MA00-0AA1 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 6SL3040-0MA00-0AA1, 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 6SL3040-0MA00-0AA1 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 6SL3040-0MA00-0AA1 Overview

Siemens SINAMICS S120 Control Units: Advanced Control for Precision Motion


The Siemens SINAMICS S120 Control Units, exemplified by the CU320 Control Unit, epitomize cutting-edge technology for precise motion control in industrial automation. With its comprehensive features and robust construction, the CU320 Control Unit offers unparalleled performance and reliability.

Technical Data:

The CU320 Control Unit boasts impressive technical specifications, including a maximum current requirement of 0.8 A and a maximum fuse protection of 20 A. Equipped with eight floating digital inputs and bidirectional non-floating digital inputs/outputs, it provides versatile connectivity options for various industrial applications.

Digital Inputs and Outputs:

The CU320 Control Unit features eight bidirectional digital inputs/outputs with voltage ranging from 3 V to 30 V. With low-level interpretation for open digital inputs, the unit ensures accurate signal detection across different voltage levels. Additionally, the unit offers high-speed digital inputs suitable for position detection, with minimal signal propagation delays.

Physical Specifications:

Measuring 50 mm in width, 270 mm in height, and 226 mm in depth, the CU320 Control Unit offers a compact form factor suitable for space-constrained installations. With a weight of approximately 1.5 kg, it provides easy handling and installation convenience. The unit is designed for robustness and durability, with PE and ground connections secured on the housing with M5 screws.

Accessories and Options:

To enhance functionality and flexibility, Siemens offers a range of accessories for the CU320 Control Unit, including PROFIBUS connectors, spacers for depth adjustment, and the STARTER commissioning tool. These accessories enable users to customize the control unit according to their specific requirements, ensuring seamless integration into existing automation systems.

Certifications and Approvals:

The CU320 Control Unit is cULus certified, assuring compliance with safety and quality standards. Its robust design and adherence to industry regulations make it suitable for use in a wide range of industrial environments, ensuring reliability and performance.

Siemens SINAMICS S120 Control Units: Frequently Asked Questions

Q: What is the maximum current requirement for the CU320 Control Unit?

A: The maximum current requirement for the CU320 Control Unit, at 24 V DC, is 0.8 A. This specification provides important information for power supply planning and ensures optimal performance of the control unit.

Q: Can the CU320 Control Unit be used for position detection?

A: Yes, the CU320 Control Unit features high-speed digital inputs specifically designed for position detection applications. With minimal signal propagation delays and precise control capabilities, these inputs enable accurate positioning in industrial automation systems.

Q: What accessories are available for the CU320 Control Unit?

A: Siemens offers a range of accessories for the CU320 Control Unit, including PROFIBUS connectors, spacers for depth adjustment, and the STARTER commissioning tool. These accessories enhance functionality and customization options, allowing users to tailor the control unit to their specific application requirements.

Q: Is the CU320 Control Unit suitable for use in hazardous environments?

A: The CU320 Control Unit is not specifically certified for hazardous environments. It is designed for general industrial automation applications and is cULus certified, ensuring compliance with safety and quality standards. Users should verify compatibility with local regulations and standards before deploying the control unit in potentially hazardous environments.

Q: Can the CU320 Control Unit be integrated with other Siemens automation products?

A: Yes, the CU320 Control Unit is designed to seamlessly integrate with other Siemens automation products and systems. It supports communication protocols such as Modbus serial and CANopen, allowing for interoperability with a wide range of Siemens devices and control systems.

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 6SL3040-0MA00-0AA1, take a look at more from our Controllers 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 6SL3040-0MA00-0AA1 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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