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Modular engineering – optimize your electrical planning by standardization. The way to faster and error-free electrical design
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Electrical planning is one of the essential steps in the development of a new machine or production plant. It ensures that all the electrical devices are supplied with power reliably and in compliance with standards. This is an often very complex process that has to be carried out efficiently and as quickly as possible, because it also involves high cost and time pressure. This means that many electrical planners find themselves in the position that they frequently have to look for and implement possible optimizations when they create their wiring diagrams.

Modular engineering is one established and increasingly used method in this regard. With this method, not every wiring diagram needs to be created from scratch  and piece by piece from individual symbols each time. Instead, pre-assembled device combinations are used and combined individually.

Modular Engineering in Panel Building:

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Practical tips for you!

Data for the engineering system form the basis of all planning activities. Correct and comprehensive article data and existing circuit diagram symbols or 3D models enable precise and error-free electrical design.

As standard, Siemens provides more than 10 different data types for its components: from internal circuit diagrams to dimension drawings and intelligent 3D data and macros.

Your advantage - all the data are structured in the same way. This also enables automated processing that is necessary at the latest when wiring diagrams are generated.

Download our CAx data from the Industry Mall or the CAx download manager or use the data portal of the E-CAD system you are using. Siemens makes its data available in standard portals such as EPLAN Data Portal,, Traceparts or as a content pack also for AutoCAD Electrical.

To modularize electrical design it is recommended to also standardize the product portfolio being used. This process will result in different requirements that have to be covered by the products:

  1. Comprehensive and versatile technical functions
  2. Global certification  
  3. Checked and tested

Our switchgear and controlgear assemblies from the SIRIUS modular system have global certification and also have a modular design.

Modular engineering enables wiring diagrams to be generated not only a lot quicker, but also fully automatically at the press of a button.

To achieve such efficiency advantages it is necessary to create the individual wiring modules that will later be combined to form a complete, whole diagram.

Although the additional effort required for creating modules pays off after a short time, you can save all this effort by using our prepared modules. 

For this purpose, we offer you the following module packages with prepared circuit diagrams. In addition to the respective main devices, each module contains the appropriate protection devices and all electrical elements required such as conductor cross-sections and break-off points.

  • SIRIUS Engineering modules for soft start applications with SIRIUS 3RW55 soft starters 
  • SIRIUS Engineering modules for applications with SIRIUS 3RM1 motor starters, SIMATIC ET 200SP motor starters, SIRIUS 3RW soft starters, SIRIUS circuit breaker-contactor combinations, SIMOCODE motor management system
  • SITOP 24V engineering modules for 24 V power supplies.

You can integrate the modules conveniently into your EPLAN project by using Drag&Drop. 
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