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Siemens 6SN1118-0DK21-0AA1

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Part Number6SN1118-0DK21-0AA1
TypeAC Drives
Model #6SN11180DK210AA1
Warranty2 Year
VariantHigh-performance control
Motor EncoderIncremental encoders sin/cos 1 VPP, EnDat
MotorSRM: 1FT6, 1FK, 1FE1, 2SP1 IM: 1PH7, 1PM6 Standard: 1LA
Control ModuleClosed-loop

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 6SN1118-0DK21-0AA1 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 6SN1118-0DK21-0AA1 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 6SN1118-0DK21-0AA1, 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 6SN1118-0DK21-0AA1 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 6SN1118-0DK21-0AA1 Overview

The 6SN1118-0DK21-0AA1 is a two-axes drive control module and part of the Simodrive 611 series. The SIMODRIVE 611 series is manufactured by Siemens. These 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 AC Drives from other manufacturers such as FANUC and Yaskawa.


The Siemens 6SN1118-0DK21-0AA1 2-axes drive control is a closed-loop control with a digital setpoint interface. It is a high-performance control that can be loaded with either FD control or MSD control drive software. Both the FD control and the MSD control contain the same user interface.

The 6SN1118-0DK21-0AA1 2-axes drive control unit is manufactured to be used as a 1-axis unit when using single axis applications. It has the same engineering as the 1-axis board. 

The Siemens 6SN1118-0DK21-0AA1 high-performance board comes in two variants. The first variant is the basic version.  The basic variant has sinusoidal voltage signals. This allows it to connect with absolute encoders with the EnDat interface.  The second version has the same features as above with additional features including the ability to evaluate a direct position measuring system. It uses sinusoidal voltage signals and a connection of absolute encoders that use the EnDat interface and an SSI interface.

The Siemens SIMODRIVE 611 control unit with a digital setpoint interface is available to work with several motors. These motors include 1 FT 6, 1 FT 7, 1 FK 7, 1 PH, 1 PM, 2 SP 1, and 1 FE 1 motors. These motors are used with the 2-axis version with high-Standard control with motor encoders and additional measuring system, voltage signals.


Simodrive 611 universal control boards, such as this 6SN1118-0DK21-0AA1, can be used in a variety of applications. They can be used in textile machines, machine tools, conveyor equipment, and many more systems. The system can also be made up of individual components and higher-level components to adapt to a variety of needs. The 6SN1118-0DK21-0AA1 universal control board was manufactured for use with the SIMODRIVE power modules.

The Siemens 6SN1118-0DK21-0AA1 is a part of the larger SIMODRIVE 611 Drive Converter system that encompasses many modules.  What are the components that comprise the drive converter system? The drive converter system has a transformer, switching and protective parts, a line filter, communicating reactors, infeed modules, power modules, and control units like the 6SN1118-0DK21-0AA1 control board that is harmonized to the chosen application technology and or processes including the motor type. Additionally, the drive converter system uses special modules and accessories to enhance performance. The Siemens drive system also implements various cooling methods for the line supply in the feed as well as the drive modules as these are dependent on power sources. There are internal cooling units, external cooling units, and hose cooling units available for the Siemens SIMODRIVE 611 drive converter system.

How to use a 6SN1118-0DK21-0AA1

This digital control plugs into one of the Simodrive power modules, such as a 6SN1123-1AA00-0CA1 or 6SN1123-1AA00-0EA1, which are sold separately. The Simodrive 611 series is a modular converter system with both operating and positioning modes. The control boards can also be expanded by terminal and Profibus-DP modules.

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 6SN1118-0DK21-0AA1, take a look at more from our AC Drives 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 6SN1118-0DK21-0AA1 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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