Download the specific for your relay models (e.g., SIPROTEC 7SJ62, 7UT61, 7UM62) from the Siemens portal. Open DIGSI 4, navigate to Tools > Install Device Driver .
Follow these steps to complete a clean installation of DIGSI 4.91:
: Run setup.exe from the download package to install the DIGSI 4 Manager.
: The first and most recommended step is to visit the official Siemens website. Siemens provides software and firmware updates for their products, including configuration and engineering tools like DIGSI.
A: This error indicates you are trying to install DIGSI 4.91 on a 32-bit operating system . You need a 64-bit version of Windows 10, 8, or 7. siemens digsi 4.91 download
Always run the driver setup after the main application installation to ensure proper communication with the SIPROTEC devices. Why Use DIGSI 4.91 in 2026?
: Use the search functionality on the Siemens website to look for "DIGSI 4.91" or simply "DIGSI" to find the latest version of the software.
Siemens discontinued general public download of older DIGSI 4 versions after 2021. As of 2026, new license purchases for DIGSI 4 are no longer available – only existing license holders may download via their contract portal.
Siemens frequently provides service packs and hotfixes (e.g., updates from 4.90 to 4.91) as free downloads on their support portal. However, the base installation file or a valid license upgrade may require an original software DVD or an authorized digital software delivery (DSD) contract from your Siemens account manager. 3. Device Drivers (Device Templates) Download the specific for your relay models (e
Configure substation communication networks, manage GOOSE messaging, and export/import SCL (Substation Configuration Language) files.
is required and must be manually enabled on Windows 10/11 systems.
Enables engineers to create custom logic and interlocks visually, without needing deep programming knowledge.
Verify your USB-to-RS232 serial converter cable uses a genuine chipset (e.g., FTDI). Check the Windows Device Manager to ensure the COM port number matches the port configured in DIGSI's communication settings. Issue 2: Missing Device Templates : The first and most recommended step is
Point the installer to your downloaded driver files to update the catalog. Troubleshooting Common DIGSI 4.91 Issues
Modify settings for overcurrent, distance, differential, and voltage protection modules.
Search for "DIGSI 4.91" or browse under Energy Automation > Protection Relays > SIPROTEC 4 > Engineering Software .