The Siemens part number 6DL5407-8AA18-0XL1 refers to the SIMATIC PCS 7 SC Library Runtime License V8.1, which includes support for versions V7.X and V8.X.

Product: SC Library Runtime License V8.1 (includes V7.X/V8.X)

 License: Single license for 1 installation

 Contents: Runtime software (R-SW) — no software or documentation included

 Languages: German and English

 Reference Hardware: PCS 7-AS 414-3, 416, 417, 410

 Status: Discontinued as of October 1, 2019

 Special Note: Requires a Legacy System Services Contract for use