S7-1500 CPUs

The heart of the SIMATIC S7-1500 PLC

The central processing units (CPUs) are the heart of the SIMATIC S7-1500 controller. They execute the user program and network the controller with other automation components. Thanks to numerous innovations, the CPUs of the SIMATIC S7-1500  PLC deliver the ultimate plus in productivity and efficiency. The hardware is extremely compact and certified to IP20 or IP65/67 standard. These highly integrated, highly versatile modules save space in and around the cabinet and reduce the spare parts inventory costs.

CPU 1518T-4 PN/DP

New High-End CPUS expand application area

There are new CPUs available in the  highest performance class covering most sophisticated requirements of motion control applications and high-availability configurations :

  • The CPU 1518T-4 PN/DP and the fail-safe CPU 1518TF-4 PN/DP are designed for most complex technological applications and high-end motion control tasks
    > Learn more
  • The CPU 1518HF-4 PN combines highest performance with functional safety for high-availability configurations
    > Learn more



SIMATIC S7-1500 CPUs are continously developed further

At a glance

The right CPUs for your applications

The CPUs iof the SIMATIC S7-1500 system are just what you need to turn your applications into practical reality.

Overview of SIMATIC S7-1500 CPUs

The scope ranges from standard and failsafe CPUs for small to midsize requirements, offering compact size designs with integrated inputs and outputs, supplemented with technological functions, all the way up to most demanding high-performance applications. Wherever an integration of high-level language C/C++ as PLC function or as self-contained application is needed, multifunctional platform CPUs come into play. For applications in the field of midrange motion control, technology CPUs provide support with extended motion control features. Special requirements regarding robustness or environmental conditions are covered with a separate SIPLUS device family.

Additional highlights of the S7-1500 CPUs

Innovative memory card for project data, archive, recipes and documents

  • Sufficient memory for any application, regardless of industry and different project sizes through the use of flexible memory cards
  • Optimized data modules and symbolic variables
  • Data retentivity for the entire working memory through intelligent system power

Efficient engineering using STEP 7

  • Symbolic programming for significant variable names 
  • Optimized compilers performance for shorter cycle times
  • Higher computing accuracy through the use of 64-bit data types 
  • Download of consistent projects

Realizing future-proof machine concepts

  • Investment protection for existing know-how due to scalability of programs on all S7-1500 CPUs 
  • Integrated migration tool enables takeover of existing S7 projects
  • Hardware upload allows fast and faultless determination of the used modules 
  • Project upload with symbolic representation simplifies service deployment

Protect your productivity

  • Security against undesirable access through authentication of the connected communication participants
  • Customer investment protection through protection of module and program
  • High system availability through integrity and confidentiality protection of project planning data, firmware file and secure communication

Safety with no need for additional hardware

  • Unified engineering for standard and fail-safe automation
  • PROFIsafe-capable communication via PROFINET and PROFIBUS

Motion Control par excellence

Every SIMATIC S7-1500 can be used for motion control applications. 

Further, SIMATIC S7-1500 Technology CPUs have advanced functions such as

  • advanced synchronization functions
  • cyclic cams
  • cross-PLC synchronous operation
  • kinematics
Product range

Find the right CPU for your requirements

Discover the extensive range of controllers you can use to turn your machine concepts into reality.

Make a choice!

Download the product overview in a PDF file, configure your controller solution inside TIA selection Tool or get more information from our online catalog the Industry Mall.

TIA Portal

Engineered with TIA Portal

Using the TIA Portal, you can curb costs, become more flexible, and achieve the best possible result faster.

Automation tasks

Automation tasks

Discover everything you need to know about automation with Totally Integrated Automation (TIA).

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Security information

In order to protect plants, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial security concept. Siemens’ products and solutions only form one element of such a concept. For more information about industrial security, please visit.

Get off to a flying start now with SIMATIC S7-1500

To turn your machine concepts into reality, all you need now is the ideal configuration. The TIA Selection Tool makes it easy to find the right controller from our portfolio for your needs. The TIA Selection Tool is available as a desktop version for downloading, or as a cloud-based option.

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