DIGSI 4.95 is a proprietary software suite designed by Siemens Energy to manage lifecycle tasks for numerical protection relays. While modern electrical substations increasingly deploy SIPROTEC 5 devices managed via DIGSI 5, thousands of utilities and industrial plants worldwide rely on SIPROTEC 4 hardware. DIGSI 4.95 provides the necessary interface to maintain these existing systems without upgrading physical hardware assets.
You need to import the latest . Download the DDF pack from SIOS and use Extras -> Update Device Catalog in DIGSI.
The installation process typically involves unpacking the downloaded DVD installation file and running Setup.exe . Engineering software DIGSI 4 - Siemens
The downloaded package is typically functional for 30 days without a license key. To activate the 30-day trial period, the term "Trial" must be entered as the serial number during the setup process. Installation Guide: DIGSI 4.95 siemens digsi 495 download full
It work, but it is not officially guaranteed for all versions. User reports show that it can be installed with the proper administrative rights and after disabling antivirus, but others have encountered fatal setup errors. In comparison, Windows 10 is a more commonly cited OS for successful installations.
Follow these steps to perform a "clean" installation of DIGSI 4.95:
If a project refuses to open, verify that the project folder is not marked as "Read-Only" and that no background DIGSI processes are hanging in the Windows Task Manager. DIGSI 4
DIGSI 4 includes built‑in drivers for all supported SIPROTEC 4 devices. Additional device driver updates may be available from the Siemens support portal for newer relay firmware versions.
If the software cannot connect to the relay, verify your COM port settings in Windows Device Manager. Ensure the interface configuration in DIGSI matches the physical port (e.g., USB, front serial, or rear Ethernet link).
If you are upgrading from an earlier DIGSI version (e.g., V4.83), back up all your projects using the Project → Archive function. Upgrading can change project file structures, and while backward compatibility is generally maintained, it is safer to keep a copy of the original. You need to import the latest
⚠️ The trial version requires entering a serial number. For a trial installation, the serial number is literally "trial" (without quotes). When the 30‑day demo expires, the software will stop functioning and cannot be restarted without purchasing a full license.
is the professional engineering software used to configure, parameterise, and evaluate SIPROTEC 4 , SIPROTEC Compact , and earlier protection relay generations. Download and Official Access
For further assistance, visit the portal at support.industry.siemens.com or contact your local Siemens representative. With a proper installation of DIGSI 4.95, you will be well‑equipped to manage and maintain your SIPROTEC relays efficiently and reliably.
For DIGSI 5 V7.50, supported operating systems include:
The software includes a System Configurator to manage vendor-neutral station designs, supporting the import and export of SCL files (ICD, CID, SCD, etc.). 2. Download and Trial Availability