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2-year Warranty

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Siemens 6SL3040-1LA00-0AA0

DESCRIPTION: S120 Control Unit CU310-2 DP, w/o CF Card 

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2 Year warranty

Part Number6SL3040-1LA00-0AA0
Model #6SL30401LA000AA0
Warranty2 Year
CategoryControl unit
Digital input11
Voltage input-3 ... 30 V
Power supplyDC 24 V (20.4 ... 28.8 V)
Power consumption at 24 V DC3.5 mA
Max. power consumption0.8 A
CommunicationProfibus DP
Digital I/O8 bidirectional
Analog input1
Encoder frequency300 kHz
Ambient temp32 ... 131 °F
PE connectionctions PE connection 1 (M5 screw)
Height7.52 in
Width2.87 in
Depth2.95 in
StandardsCE, KC, cULus, EAC, C-Tick (RCM)

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 6SL3040-1LA00-0AA0 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 6SL3040-1LA00-0AA0 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 6SL3040-1LA00-0AA0, 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

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  • Order within the next 21 hours and 40 minutes.
  • If you order between 4pm and 6pm EST, you will be charged a small rush fee.

Ask about exchanging your faulty 6SL3040-1LA00-0AA0 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 6SL3040-1LA00-0AA0 Overview

Siemens products are manufactured in Germany and are designed for Automotive, aerospace, power generation, and electronics usage. They come with a 2-year warranty from MRO Electric. We also carry Controllers from other manufacturers such as FANUC and Yaskawa.

The Siemens 6SL3040-1LA00-0AA0 is a control unit that falls under the SINAMICS product family, known for its advanced industrial automation solutions. Manufactured by Siemens, a globally renowned name in the field of automation and industrial technology, this particular control unit, with its distinct features and capabilities, plays a crucial role in enhancing the efficiency and precision of various industrial processes.

Product Overview 

The Siemens 6SL3040-1LA00-0AA0 is specifically identified as an "S120 CONTROL UNIT CU310-2 DP, W/O CF CARD." Breaking down this designation, we can gain a better understanding of its key attributes:

  • Control Unit: This device serves as a central hub for managing and controlling various aspects of industrial machinery and processes. It plays a pivotal role in ensuring that operations run smoothly and according to predefined parameters.
  • SINAMICS S120: The inclusion of the "SINAMICS S120" label signifies that this control unit is part of the SINAMICS series, which is Siemens' flagship family of drive systems for motion control applications. SINAMICS products are renowned for their precision, reliability, and versatility in a wide range of industrial settings.
  • PROFIBUS Interface: The "PROFIBUS Interface" feature enables seamless communication and data exchange between the control unit and other devices within an industrial network. This connectivity is vital for real-time monitoring and control.
  • Without CompactFlash Card (W/O CF CARD): Unlike some variants that come with built-in CompactFlash storage, this particular model does not include a CompactFlash card. Users may opt to add one if needed for data storage or application-specific functions.
  • 24 VDC, 7.3 A: The voltage and current specifications indicate that this control unit operates on a 24-volt DC power supply, drawing a maximum current of 7.3 amperes. These parameters are essential for proper integration into the power infrastructure of an industrial system.


The Siemens 6SL3040-1LA00-0AA0 control unit finds its application across a wide spectrum of industries, including manufacturing, automotive, energy, and more. Its proficiency in motion control and seamless communication with other industrial devices makes it indispensable in scenarios where precision, speed, and reliability are paramount.

One of its primary use cases is in conveyor systems, where it can precisely regulate the speed and position of conveyor belts, ensuring efficient material handling and logistics. In CNC (Computer Numerical Control) machines, it plays a vital role in controlling the movement of tools and workpieces, contributing to the high-precision machining of components.

Additionally, this control unit can be employed in robotic applications, where it facilitates the accurate coordination of robot arms and end-effectors, enabling tasks ranging from pick-and-place operations to complex assembly tasks.

Benefits: The Siemens 6SL3040-1LA00-0AA0 offers several advantages to industries:

  • High Precision: Its integration with the SINAMICS family ensures exceptional precision in motion control, resulting in improved product quality and reduced waste.
  • Robust Reliability: Siemens is known for manufacturing robust industrial equipment, and this control unit is no exception. It can withstand harsh industrial environments and operate reliably for extended periods.
  • Easy Integration: The PROFIBUS interface simplifies integration into existing industrial networks, promoting seamless data exchange and remote monitoring.
  • Scalability: Users can customize the control unit with CompactFlash cards or additional components to meet specific application requirements, making it a versatile choice for various scenarios.

In conclusion, the Siemens 6SL3040-1LA00-0AA0 control unit is a crucial component in the SINAMICS S120 family, offering advanced control and communication capabilities for industrial automation. Its versatility, reliability, and precision make it a valuable asset in industries seeking to optimize their processes and enhance productivity while maintaining a high level of control and efficiency.


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 6SL3040-1LA00-0AA0, 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 6SL3040-1LA00-0AA0 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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