| Extension | Description | Common Scenario | | :--- | :--- | :--- | | | EPLAN Data Format (for macros & symbols) | Importing or exporting a single macro, symbol library, or part data. Used when sharing a specific device or function, not a whole project. | | .emd | EPLAN Macro (Drawing) | A saved drawing fragment (e.g., a motor circuit or PLC card) that can be re-used across multiple projects. | | .ems | EPLAN Macro (Window/Symbol) | Similar to .emd but specifically for window macros or symbol-based macros. | | .txt / .csv | Plain text / Comma Separated Values | Used for importing/exporting parts lists, terminal strip definitions, cable schedules, or device tags to/from Excel or ERP systems. | | .dxf / .dwg | AutoCAD Drawing Exchange | Exporting EPLAN schematics to AutoCAD for non-EPLAN users. Importing building floorplans or panel layouts from mechanical engineers. | | .pdf | Portable Document Format | Standard output for plot generation, client approval, or manufacturing instructions. | | .xml | Extensible Markup Language | Advanced data exchange with CAE systems, PLM (Product Lifecycle Management), or custom scripts. Also used for OPC (Open Platform Communications) data. |
| Extension | Description | Primary Use | | :--- | :--- | :--- | | | EPLAN Project Archive (Old Format) | Used in older versions (e.g., EPLAN 5.x) to archive an entire project into a single compressed file. | | .elx | EPLAN Project Archive (New Format) | The modern replacement for .elk . Used for exporting, importing, and backing up projects. It is a container file (ZIP-based) that holds all project data, including pages, parts, symbols, and reports. | | .epb | EPLAN Backup | A secure backup format that may include project history and user-specific settings. Often used for disaster recovery. | | .zw1 | Working Project (Proprietary) | These are the internal database files EPLAN uses while a project is open. Users should never manually move, delete, or edit .zw1 files , as doing so will corrupt the project. | eplan file extension
Modern EPLAN relies heavily on external databases for component management (parts). | Extension | Description | Common Scenario |
The is far more than a suffix—it is a roadmap to the entire CAE workflow. The .PROJECT tells you where the work is; the .EPF holds what the work is; the .ESY defines how it looks; and the .ELK preserves it for the future. the .ESY defines how it looks
. It is a compressed file that contains all project data for easy distribution.