The Siemens part number 6DL5407-8AA68-0YE0 refers to the SIMATIC PCS 7 SC Library Software Upgrade V9.1, designed to upgrade SC libraries from V7.X or V8.X to V9.1 within PCS 7 projects.
Product: SC Library Software Upgrade V9.1 (from V7.X/V8.X)
License: Valid for all PCS 7 ES/AS/OS components of a project
Contents: Electronic software (E-SW), software and documentation on USB
Languages: German and English
Supported OS: Windows 10 LTSC 2019, Windows Server 2019
Reference Hardware: PCS 7 IPC Bundle
Successor: Replaced by 6DL5407-8AA78-0YE0, which upgrades to V10.0
Status: Still listed as an active product in Siemens’ catalog