Digsi 4.90 Download |verified| Upd May 2026

The official download for DIGSI 4.90 as a standalone update has largely been superseded by newer versions on the Siemens support portal.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

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

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. 

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. 

Siemens DIGSI 4.90 Download and Update Guide DIGSI 4.90 is a specialized engineering software version primarily used to install older device drivers that may no longer be included in newer releases like V4.93 or V4.95. While Siemens generally recommends using the latest version—such as DIGSI 4 V4.95 or V5.00—for current security and feature enhancements, V4.90 remains a critical bridge for maintaining legacy SIPROTEC protection relays. No reviews Purpose of DIGSI 4.90

Visual Logic: Users can create logic visually using CFC (Continuous Function Chart), removing the need for deep programming knowledge. Download and Installation Requirements Digsi 4.90 Download UPD

The Official Siemens Support Portal provides download files, such as DIGSI_4_V4.90.zip, which is approximately 2.1 GB.

Since this is professional industrial software, it is best to stick to official channels to ensure file integrity and security: Siemens Industry Online Support (SIOS):

This is the primary official source. You can typically find the DIGSI 4.90 Service Pack

or trial versions by searching for "DIGSI 4 software" on their portal. Note that you may need a registered account to access certain downloads. SIPROTEC Digital Grid Portal: Siemens often provides updates through their dedicated Digital Grid resources for existing license holders. Key Update Info Compatibility:

DIGSI 4.90 is designed to run on Windows 10 (64-bit) and Windows 7. If you are on a newer OS, check the "Compatibility Tool" on the Siemens site. Trial vs. Full:

You can often download the software as a "Trial," but a valid License Key (USB Dongle or Software License) is required for full functionality beyond the trial period. DVD/USB Media:

If you have a slow connection, DIGSI 4 is still available for order as physical media through Siemens sales partners. Quick Installation Tips

Always back up your existing project database before upgrading from an older version (like 4.8x). Admin Rights:

Run the installer with full administrative privileges to avoid registry errors.

After installing 4.90, ensure your device drivers (Device Drivers Manager) are also updated to match your hardware's firmware version. (like SP1) or help with the license activation

The Utility and Implementation of DIGSI 4.90 for Power System Engineering

The field of power system protection relies heavily on sophisticated engineering software to ensure the reliability and safety of electrical grids. Among these tools,

serves as the primary user interface for Siemens SIPROTEC protection devices. While newer versions like DIGSI 5 have been released for more modern hardware, DIGSI 4.90

remains a critical download for engineers who must maintain legacy systems and specific hardware drivers. The Role of DIGSI 4.90 in Legacy Support

DIGSI 4.90 is uniquely positioned in the software lifecycle. While later iterations such as V4.95 and V5.00 have been introduced, version 4.90 is explicitly maintained to provide access to older device drivers

that are not included in more recent releases, such as V4.93 or V4.94. This makes it an essential bridge for engineers working with older SIPROTEC 3 or early SIPROTEC 4 devices that require specific driver compatibility no longer found in the newest "full" installation packages. Key Features and Capabilities

The software simplifies complex protection settings through an intuitive graphical interface. Key functional benefits include: Assignment Matrix

: Provides a comprehensive, "at-a-glance" view of device configurations, allowing users to map LEDs, binary inputs, and output relays with a single click. CFC (Continuous Function Chart)

: Enables engineers to create custom logic and interlocks visually by drawing technical processes, removing the need for advanced programming knowledge. IEC 61850 System Configurator

: Supports vendor-neutral station design by importing and exporting SCL files (ICD, SCD, etc.), facilitating smooth integration with SCADA systems. SIGRA Integration

: Allows for the evaluation of disturbance records to visualize grid events and locate faults quickly, which is vital for reducing system downtime. Installation and Technical Requirements

Downloading and installing DIGSI 4.90 typically involves a 2.1 GB package containing the core software and released device drivers. Engineering software for SIPROTEC 5 - DIGSI 5 - Siemens

I understand you're looking for content related to "Digsi 4.90 Download UPD." However, I need to provide an important clarification first: The official download for DIGSI 4

Digsi 4 (including version 4.90) is proprietary software from Siemens used for configuring and maintaining SIPROTEC protective relays. It is not legally available for free public download. Obtaining it requires a valid license, a maintenance agreement with Siemens, or authorized access through an official Siemens partner.

If you proceed without proper licensing, you risk:

• Violating software copyright laws
• Missing critical security updates and patches
• Lacking technical support
• Potential malware risks from unofficial sources

The Installation Process:

1. Run as Administrator: Right-click the Setup.exe or DIGSI_490_UPD.msi file and select Run as administrator.
2. Language Selection: Choose English (or your preferred language).
3. License Agreement: Accept the Siemens EULA.
4. Installation Type:
   • Complete: Installs all relay libraries, CFC tools, and IEC 61850 editors. (Recommended).
   • Custom: Only choose if you are an expert who needs specific relay families only.
5. Driver Installation: When Windows warns about "Driver not signed," click Install anyway (this is critical for the USB dongle driver).
6. Restart: Do not skip the restart.
7. Post-Installation: After reboot, plug in your Siemens USB dongle. Windows should detect the "CmStick" automatically.

5. Recommendations

1. Use Official Channels Only: It is strongly recommended

Introduction

Digsi is a popular software tool used for configuring and commissioning protection devices, particularly in the field of power systems and electrical engineering. The software is widely used by professionals and engineers to ensure the reliable operation of power grids and electrical networks.

What is Digsi 4.90?

Digsi 4.90 is a specific version of the Digsi software, which offers advanced features and functionalities for the configuration, testing, and maintenance of protection devices. This version is likely to be an update to the previous versions, with new features, bug fixes, and improvements.

Importance of Digsi 4.90

The Digsi 4.90 software is essential for electrical engineers, technicians, and professionals working in power systems, as it enables them to:

1. Configure and commission protection devices: Digsi 4.90 allows users to configure and program protection devices, such as relays, to ensure the safe and reliable operation of power systems.
2. Test and validate protection schemes: The software provides tools for testing and validating protection schemes, which is crucial for ensuring the correct operation of power systems during faults and abnormal conditions.
3. Monitor and analyze power system performance: Digsi 4.90 enables users to monitor and analyze power system performance, identify potential issues, and optimize system operation.

Downloading and Installing Digsi 4.90

To download and install Digsi 4.90, users typically need to:

1. Visit the official website: Users should visit the official website of the software developer or a authorized distributor to download the software.
2. Check system requirements: Ensure that the computer meets the minimum system requirements for the software.
3. Follow installation instructions: Follow the installation instructions provided with the software to ensure a successful installation.

UPD Files and Updates

The term "UPD" in "Digsi 4.90 Download UPD" likely refers to an update file or a patch that is used to update the software to the latest version. UPD files are commonly used to distribute software updates, bug fixes, and new features.

Conclusion

Introduction to Digsi 4.90

Digsi 4.90 is a software tool used for configuring and parameterizing protection devices, particularly those from Siemens, such as the SIPROTEC and MOREDRET series. The software allows users to design, configure, and test protection and control systems.

Key Features of Digsi 4.90

• Device Configuration: Digsi 4.90 enables users to configure and parameterize protection devices, including setting up communication protocols, protection functions, and control logic.
• Protection and Control: The software provides a range of protection and control functions, including overcurrent, distance, and differential protection.
• Monitoring and Testing: Digsi 4.90 allows users to monitor and test protection and control systems, including fault location and event logging.

Benefits of Using Digsi 4.90

• Improved Efficiency: Digsi 4.90 streamlines the configuration and parameterization process, reducing the time and effort required to commission protection and control systems.
• Enhanced Reliability: The software ensures accurate configuration and testing of protection devices, reducing the risk of errors and improving overall system reliability.

System Requirements for Digsi 4.90

• Operating System: Digsi 4.90 is compatible with Windows 10, Windows 8.1, and Windows 7.
• Hardware: The software requires a minimum of 4 GB RAM and a 2.4 GHz processor.

Downloading Digsi 4.90

To download Digsi 4.90, users can visit the Siemens website and follow these steps:

1. Go to the Siemens website (www.siemens.com).
2. Navigate to the "Support" or "Downloads" section.
3. Search for "Digsi 4.90" in the search bar.
4. Select the software package and click on the download link.
5. Follow the installation instructions to install the software on your computer.

Conclusion

Digsi 4.90 is a powerful software tool for configuring and parameterizing protection devices. Its key features, benefits, and system requirements make it an essential tool for protection and control engineers. By following the download and installation process, users can access the software and take advantage of its capabilities.

DIGSI 4.90 is the essential, industry-standard PC engineering software developed by Siemens for configuring, parameterizing, and operating all SIPROTEC 2, 3, and 4 protection relays. If you are looking to download the software, updates, or drivers, you can obtain the latest full installation versions and updates directly from the official Siemens Industry Online Support (SIOS) Portal. 🛠️ Overview of Siemens DIGSI 4.90 The Installation Process:

DIGSI 4 serves as the critical user interface for the SIPROTEC protection device family. Version 4.90 provides a reliable and intuitive engineering environment, particularly favored in industrial power and energy distribution systems. Key Capabilities of DIGSI 4.90:

Relay Parameterization: Adjust, calibrate, and send configuration settings to digital protection relays.

IEC 61850 System Integration: Leverages the built-in IEC 61850 System Configurator to manage cross-device communications and map GOOSE messages.

Comtrade File Analysis: Integrates seamlessly with SIGRA to evaluate fault records, analyze oscillographic curves, and troubleshoot power system disturbances.

Device Driver Independence: Features an isolated structure where you can update individual device drivers without necessarily reinstalling the core platform. 📥 How to Download DIGSI 4.90 & Updates

To ensure safety, cyber-security, and maximum compatibility, you should only download DIGSI software directly from authorized Siemens distribution channels. Step-by-Step Official Download Process:

Visit the SIOS Portal: Navigate directly to the official Siemens Software Download Section.

Access the Required Version: While DIGSI 4 V4.90 was widely used, Siemens frequently releases maintenance updates such as DIGSI V4.93, V4.95, and the newer V5.00. You can access the DIGSI 4 V4.93 Full Download or subsequent packages like DIGSI 4 V4.95 to obtain the newest compatible installers.

Download the Trial: If you do not possess a physical product card or license key, you can download the trial versions. Entering the word Trial as the serial number during installation enables a fully functioning, 30-day evaluation period.

Acquire Device Drivers: Extract the downloaded file and install specific device drivers matching the MLFB part number of your SIPROTEC relay.

DIGSI 4.90 is a legacy engineering software tool from Siemens used for configuring and managing SIPROTEC 4 protection devices in electrical power systems. While v4.90 was a significant update, it has largely been superseded by newer versions such as v4.94, v4.96, and v5.00. Key Download & Installation Details

Official Source: The most reliable way to obtain DIGSI 4 is through the Siemens SiePortal (formerly Industry Support).

Trial Version: Siemens typically provides a full version download that functions as a 30-day trial if no license key is entered. To activate this, you must enter "Trial" as the serial number during setup.

Compatibility Warning: Version 4.90 may have compatibility issues with older operating systems like Windows XP. Users have reported that the installer might require a "clean install" (uninstalling previous versions first) rather than an "over-the-top" update.

Drivers: The software package often includes all released DIGSI 4 device drivers, which can be installed independently to support specific relay hardware. Recommended Versions for Modern Systems

If you are using Windows 10, it is highly recommended to use a more recent version than 4.90 to ensure stability:

DIGSI 4 V4.94 SP1: Requires manual installation of .NET Framework V3.5 on Windows 10 for IEC 61850 devices to function properly.

DIGSI 4 V4.96/V5.00: These are the latest iterations for legacy SIPROTEC 4 hardware, offering better compatibility with current PC environments.

Please note: DIGSI 4 is proprietary software from Siemens for configuring and parameterizing SIPROTEC 4 protective relays. It is not legally available for public download from free repositories, torrent sites, or unauthorized file-sharing platforms.

Part 3: System Requirements for DIGSI 4.90

Before proceeding, ensure your engineering laptop or workstation meets these specifications.

If you have a legitimate need for Digsi 4.90:

Official channels:

1. Siemens Industry Online Support – login with your Siemens account that has an active software service agreement
2. Siemens Customer Portal – download available under your licensed products
3. Contact your Siemens distributor – request the update package directly

Typical update filename format (official):
Digsi4_V4.90_Update_Setup.exe or similar naming convention provided via Siemens support.

Q2: Can I use DIGSI 4.90 on Windows 11 ARM (e.g., Surface Pro X)?

A: No. It requires x86/x64 architecture. Emulation via Microsoft Prism is not supported.

Part 6: Frequently Asked Questions (FAQ)