To obtain a legitimate copy of DIGSI 4.90 (either full version or as an update to an existing DIGSI 4 installation), you must use official Siemens channels:
Siemens Service & Support Portal
Siemens License Manager / WebKey
Siemens manages its software distribution through the Siemens Industry Online Support portal.
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DIGSI 4.90 is a legacy engineering software used to configure, commission, and operate SIPROTEC 4 protection relays
in industrial and energy distribution systems. While version 4.90 is still in use, Siemens has since released newer versions, including
, which offer broader compatibility with modern operating systems and newer device drivers. Download Options Official downloads are available through the Siemens Industry Online Support (SIOS)
portal. Users typically must register for a free account to access the installation files. Trial Version : The full software can be downloaded and used as a 30-day trial Digsi 4.90 Download UPD
without functional restrictions by entering "Trial" as the serial number during setup. Full Version
: Requires a valid license key for permanent use after the trial period ends. Latest Stable Versions DIGSI 4 V5.00 Full Version (released April 2025). DIGSI 4 V4.96 Full Version (released April 2023). Key Features
To download and set up DIGSI 4.90 (or the latest compatible version), you should use the official Siemens Industry Online Support (SIOS) portal. Siemens periodically updates this software to maintain compatibility with Windows and SIPROTEC devices. 1. Official Download & Installation
The most reliable way to obtain the software is through the Siemens SiePortal.
Download Process: Search for "DIGSI 4 Full Version" on the portal. You will typically find the most recent version, such as V4.95 or V4.96.
Trial Period: Most modern versions can be installed as a 30-day trial without a license key by entering the word "Trial" as the serial number during setup.
Requirements: Ensure Microsoft .NET Framework V3.5 is installed manually, especially on Windows 10/11 systems, as it is required for DIGSI 4 to function.
Device Drivers: After installing the core software, you must also download and install the specific Device Drivers for your SIPROTEC relays to enable communication. 2. Configuration & Key Features
Once installed, DIGSI 4 serves as the primary engineering tool for SIPROTEC 4 and Compact devices. To obtain a legitimate copy of DIGSI 4
DIGSI Manager: Used to create project hierarchies and folders to organize your devices.
Configuration Matrix: Provides a complete overview of LED assignments, binary inputs, and relay outputs in a single interface.
Fault Analysis: Includes SIGRA for visualizing disturbance records and COMTRADE files to analyze grid faults.
IEC 61850: For advanced substation automation, the System Configurator is used to manage SCL files and station communication.
The official download for DIGSI 4.90 as a standalone update has largely been superseded by newer versions on the Siemens support portal. For the most stable experience and compatibility, Siemens typically provides the "Full Version" which includes the latest service packs and device drivers. Official Download Options You can download the latest versions of directly from the Siemens Industry Online Support (SIOS)
portal. These versions can be used for clean installs or updates and include a 30-day trial period (enter "Trial" as the serial number): DIGSI 4 V4.96 Full Version
: The most recent stable version which includes the IEC 61850 System Configurator and SIGRA. DIGSI 4 V4.95 Full Version
: An alternative stable release if specific older hardware compatibility is required. DIGSI 4 V5.00 Full Version : The latest iteration for the DIGSI 4 series. Important Installation Notes Update vs. Full Install
: If you are trying to update an existing installation (e.g., from v4.84 to v4.90), the installer may require you to manually uninstall the old version Siemens Service & Support Portal
before running the new setup, as "over-the-top" updates are sometimes restricted by the installer. Device Drivers
: If you only need to update specific hardware support, you can often download and install released DIGSI 4 device drivers
individually without reinstalling the entire software suite. Compatibility
The Digsi 4.90 Download UPD is not just a minor patch; it is the final, most stable evolution of a legendary engineering tool. For protection engineers, failing to update to 4.90 means risking database corruption, driver conflicts with Windows 10, and inability to support newer relay firmware.
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If you are working with Siemens protection relays, you know that Digsi 4 is the industry-standard engineering tool for configuring and managing SIPROTEC devices. With the release of newer versions, many engineers are specifically looking for the Digsi 4.90 download to ensure compatibility with legacy systems or to access specific features introduced in this build.
In this post, we cover everything you need to know about Digsi 4.90, including its key features, system requirements, and how to safely acquire the software.
Why should you invest time in finding the 4.90 update? Here are the critical changes compared to older versions (like 4.84 or 4.87):
This is the only official location.