The Siemens part number 6DL5407-8AA18-0YA0 refers to the SIMATIC PCS 7 SC Library Engineering Software V8.1, which includes support for versions V7.X and V8.X.
Product: SC Library Engineering Software V8.1 (includes V7.X/V8.X)
License: Single license for 1 installation
Contents: Electronic software (E-SW), software and documentation on DVD
Languages: German and English
Supported OS: Windows 7 Ultimate, Windows Server 2008 R2
Reference Hardware: PCS 7 IPC bundle
Status: Discontinued as of October 1, 2018
Special Note: Requires a Legacy System Services Contract for use