Digsi 4.88 Software Download — Verified Source

Issue: "License not found" after installation.

Issue: "Driver Signature" error on Windows 10.

Issue: Cannot communicate with the relay. digsi 4.88 software download

If you are debating whether to upgrade an older version (like V4.60 or V4.70) to V4.88, consider the following improvements typically included in this revision:

This report outlines the status, acquisition method, and installation requirements for DIGSI 4.88, the engineering software used for configuring Siemens SIPROTEC 4 protection relays. Unlike previous versions, V4.88 is a significant "Innovation Release" that introduces compatibility with modern Windows operating systems and new hardware features. Issue: "License not found" after installation

Due to licensing restrictions, this software is not available for public download and requires a valid Siemens license key and a customer portal account for acquisition.

DIGSI 4.88 is a service and engineering tool developed by Siemens Energy (formerly Siemens Power Transmission & Distribution). It is designed to work with the SIPROTEC 4 relay family (e.g., 7SJ62, 7SJ64, 7UT61, 7SA6, 7SD5, etc.). Key capabilities include: Issue: "Driver Signature" error on Windows 10

Version 4.88 is particularly valued for its stability with Windows 7 and Windows 10 (32-bit and 64-bit) and improved USB driver support compared to older 4.8x releases.

This section details the recommended workflow for installation.

Only if you have a valid Service Access Code (SAC) or a purchased license. Otherwise, Siemens will redirect you to a sales representative.

(Check the official Siemens release notes on the download page for the exact changelog of 4.88.)