This video show how to download SIMATIC PDM and it's device library, via the Siemens Support (SIOS) page. You will need to register and agree certain T&C's.
For more information and links to software
Video Content
0:00 Intro
0:14 Why SIOS
1:24 Where to find SIOS
1:40 Register not a robot
1:50 Register user data
2:02 Export restrictions
2:31 Accept T&C's
3:15 Note regarding licenses
3:38 Downloading SIMATIC PDM 9.2 SP2