Proven performance in the premium class of CNC controls


SINUMERIK 840D sl is considered to be the standard in the premium class CNCs, which is certainly justified. High CNC performance, along with flexibility and openness – which has been unachievable up until now – represent the basis for almost every machine concept. A high-performance hardware architecture and intelligent control algorithms as well as premium class drive and motor technology class ensure highly dynamic performance and machining precision. CNC SINUMERIK 840D sl is complemented by a comprehensive range of solutions for integration into IT environments.

Plan your visit using the EMO 2019 eBooklet - quick and easy with your smartphone or tablet.

SINUMERIK 840-equipped machines at EMO 2019

SINUMERIK ONE. Bring ideas to life.

You want to start into the future with the most powerful SINUMERIK?

Then put your trust in SINUMERIK ONE and its digital twin!

At a glance

High performance

SINUMERIK Operate Display Manager - efficient user interface design

Individual operating concepts for more versatility and convenient machine handling

The SINUMERIK Operate Display Manager helps you to get the most out of your large screens. Dividing the screen space into multiple areas allows you to take in a lot of information at a single glance. Intuitive gesture and multi-touch operation and the clearly structured display of various applications, widgets, or a virtual keyboard facilitate fast, user-friendly operation. The appearance of the Display Manager screen surface can be adjusted at any time to suit the individual preferences of the operator.

SINUMERIK 840 - the open CNC for modular machine concepts

SINUMERIK 840D sl offers an almost inexhaustible performance potential: Thanks to its drive-based, high-performance NCUs (Numerical Control Units) with state-of-the-art multicore processor technology, up to 93 axes in 30 machine channels can be controlled in the NCU link. 

In addition to the scalable NCU performance, SINUMERIK 840D sl also has a high degree of modularity when it comes to the operating components. A flexible M:N operating concept – for example, any operator panel can be combined with the NCU – makes the SINUMERIK 840D sl the ideal solution when operating high-end machine tools.

Communication at every level

SINUMERIK 840D sl is perfectly embedded in the Siemens TIA environment using PROFINET. Totally Integrated Automation stands for a unique level of seamless integration – from the field, through production, up to the company supervisory level.

Benchmark in open architecture

The openness of the SINUMERIK 840D sl is second to none. The CNC can be optimally adapted to the machine's technology. For instance, the operating system can be supplemented and adapted, or even robots and handling systems can be integrated. 

Utilize the bandwidth of machining technologies

Milling and turning at the limit is one of the strengths of SINUMERIK 840D sl. Further, SINUMERIK 840D sl allows an almost inexhaustible range of technologies to be addressed: from grinding and laser machining, through gearwheel- up to multitasking machining. With its outstanding system flexibility, SINUMERIK 840D sl is also the first choice when it comes to addressing completely new fields of technology.

You can find additional information about SINUMERIK 840 CNCs here:

Download brochure

 Discover the Digital Enterprise solutions at EMO fair in Hannover from September 16th to 21st, 2019

Discover SINUMERIK CNC Systems at EMO fair in Hannover from September 16th to 21st, 2019

Digitalization in Machine Tool Manufacturing – Thinking further!

Panel versions

SINUMERIK 840: Modular panel concept

SINUMERIK panels make operation and visualization easier for machine operators. With their touch screens, they open the way to create new and unique machine operating philosophies. In conjunction with the state-of-the-art SINUMERIK Operate, touch and gesture operation are establishing themselves in the production domain.

SINUMERIK blackline plus panels

SINUMERIK blackline plus operator panels utilize the 16:9 format, have an attractive modern design and provide the basis for completely new operating concepts. They are available in sizes ranging from 15 to 24 inches. In the basic MCP 398C version, the add-on machine control panels are identical for all screen formats – and can be expanded using additional modules.

State-of-the-art and user-friendly

  • Scratch-resistant, non-reflecting surface providing a brilliant display and attractive front design
  • Capacitive multitouch display
  • A better overview using a foldable sidescreen as navigation information bar in SINUMERIK Operate
  • Highest performance for complex PC-based visualization tasks


  • Maximum IP65 degree of protection and scratch-resistant glass front
  • Customized concepts can be implemented

Modular and standard across the board

  • 15, 19, 22 and 24 inch screen sizes with the matching machine control panel
  • Customized concepts can be implemented

SINUMERIK OP 015 black

The SINUMERIK OP 015 black is an ultramodern operator panel for SINUMERIK 840D sl systems. It offers the highest degree of operator friendliness with its 15" multitouch wide screen.

Operator friendly

  • Capacitive 15" color display
  • Intuitive multitouch operation (up to 5 touch points simultaneously)
  • High resolution, widescreen monitor for operator-friendly operation and monitoring (1366 x 768 pixels)
  • Integrated thin client unit for transmitting video via the Ethernet


  • Maximum IP66 degree of protection and scratch-resistant glass front
  • Multitouch technology – therefore no mechanical components to wear
Supplementary products

Ergänzende Produkte

Engineering in the TIA Portal

The TIA Portal is the working environment for the configuration, parameterization and programming of machine tools and is characterized by a high level of user-friendliness. It helps to deal with engineering tasks in a uniform and structured manner. The SINUMERIK 840D sl is integrated into the TIA Portal:

  • Thanks to STEP 7 in the TIA Portal, the automation programs for SINUMERIK can be created in the common PLC languages or by efficient high-level language programming in Structured Control Language (SCL).
  • With WinCC, the TIA Portal provides a comprehensive configuration tool for creating professional user interfaces.
  • The Safety Integrated plus safety concept can be implemented easily and efficiently thanks to the TIA Portal.

You can find more information on the TIA Portal here:  

SINUMERIK 840 - Safety Integrated

Siemens is the pioneer when it comes to protecting man and machinery. For almost two decades now, SINUMERIK Safety Integrated has been the benchmark for safety technology integrated in the system for machine tools. SINUMERIK Safety Integrated involves intelligent system functions that provide the highest level of operator friendliness and safety for both operator and machine. For example, setting up the machine with the protective door open.

Teamed-up with the SINAMICS drive system, SINUMERIK 840 controls offer the optimum platform for implementing safe machine concepts.

From software release 4.8 SP 2, Safety Integrated plus is also available for SINUMERIK 840D sl. A real highlight is the graphically supported commissioning with screen forms that significantly simplify parameterizing the safety functions.


Additional information about SINUMERIK Safety Integrated

SinuTrain - the control-identical NC-programming station

The SinuTrain offline programming station brings SINUMERIK Operate to the PC, including an animated machine control panel, to create a training situation that is very similar to that experienced in reality. This facilitates an easy transition from a training into a practical environment. This powerful tool allows NC programs to be programmed offline at a PC in an environment that is close to reality; these NC programs can then be directly transferred to the CNC. CNCs can be programmed in a training environment exactly as they will be subsequently used in real machines controlled by SINUMERIK. Perfectly tailored training packages are available as well as a free-of-charge basic version – everything you need for efficient training in your own environment.


Download SinuTrain Basic

Additional information about SinuTrain

System components

The powerhouse in the background

SINUMERIK 840 controls, teamed up with SINAMICS drives and SIMOTICS motors are optimally designed to address the requirements of standard machines.

SINAMICS S120 - maximum flexibility

SINAMICS S120 is synonymous with performance and flexibility when it comes to equipping machine tools. In addition to a wide range of motor modules, various infeed options are available with functions such as energy recovery and controlled DC link. This ensures the shortest spindle acceleration times, and facilitates perfect reactive power compensation for the complete machine.

More about SINAMICS S120

SINAMICS S120 Combi - the optimum solution for compact machines

SINAMICS S120 Combi combines the performance of the modular SINAMICS S120 in a compact, rugged design. One infeed and up to four Cabinet Modules are integrated in one housing. This drive is the ideal basis for equipping compact standard machine concepts with a spindle power of 15 kW and up to five feed axes.

More about SINAMICS S120 Combi

SIMOTICS servomotors

High stall torques, high encoder accuracy and perfect smooth-running operation make SIMOTICS servomotors the optimum feed drive for machine tools.


SIMOTICS linear and torque motors

Going beyond conventional rotary motor principles, the SIMOTICS range also encompasses linear and torque motors with a high dynamic performance. Elasticity, backlash and friction in the machine drive train – along with mechanical transmission elements – can be almost completely eliminated when using SIMOTICS L-1FN3 linear motors. Further, in addition to positioning tables requiring a high dynamic performance, SIMOTICS T-1FW6 built-in torque motors can also be used for round and swiveling tables used in precision 5-axis machining applications. Their innovative design also means that they can address completely new fields of technology, for example turning in milling machines.


SIMOTICS spindel motors

An outstanding portfolio is obtained by teaming-up the high level of competence in spindle design and construction of Weiss Spindeltechnologie GmbH with Siemens' long tradition of building electric motors. This unique portfolio supports all types of spindle solutions – from classic mechanical spindles based on SIMOTICS M-1PH8 and SIMOTICS M-1PH1 mounted spindle motors, through SIMOTICS M-1FE1 and M-1FE2 – up to hybrid and high-performance motor spindles.



SINUMERIK 840 in the field

SINUMERIK 840 are being successfully used in a wealth of projects. You can find an interesting selection of these projects here.

Additional information


Simply browse through our online catalog to discover more about SINUMERIK 840. You can review the complete portfolio with all components – extending from the hardware, through the software, up to the associated accessories.

Obtain an overview of all SINUMERIK 840 components in our online catalog

To the online catalog