QElectroTech is an open-source application for creating electrical, electronic, automation, and control system diagrams. A well-organized symbol library significantly speeds up schematic creation and increases consistency. This article examines the Siemens library concept within QElectroTech: what it is, why it's useful, how to create, organize, customize, and share a Siemens-style library, plus practical workflows, best practices, and examples for industrial automation projects.
The is a community-driven collection of specialized electrical symbols designed for creating professional schematics of Siemens-based automation systems. While QET includes a massive standard "QET Collection," users often supplement it with manufacturer-specific libraries like those for Siemens S7-1200 or S7-1500 PLCs to ensure precise wiring and panel layouts. Key Features of Siemens Symbols in QET
S7-1200, S7-1500, S7-300, and ET 200 SP distributed I/O systems. SITOP Power Supplies: 24V DC power modules. qelectrotech siemens library
Would you like a quick guide on creating a custom Siemens element in QET from scratch?
Dedicate separate schematic pages for high-voltage power distribution (SITOP inputs, motor starters) and low-voltage control signals (PLC I/O cards). How to Create or Customize Your Own Siemens Elements SITOP Power Supplies: 24V DC power modules
Ensures correct pin numbering, terminal spacing, and connection point types.
Drawing each input/output channel group or terminal module as a separate element. This is the preferred method for high-density systems like the Siemens S7-1500. It allows you to distribute input and output cards across different pages of your schematic document. Utilizing Master/Slave Links why it's useful
Since these libraries are user-contributed, always double-check the pinouts against the official Siemens datasheet.
A step-by-step tutorial on drawing a (like the S7-1200) in the element editor
The QET is the primary tool for this. You can open it by right-clicking on an existing element in the library and selecting "Edit element". While you can start from a blank canvas, the most efficient method is often to use an existing element as a base, open it, and then use the "Save as" function to create a new symbol you can then modify.