You can download the software directly from the Siemens Industry Online Support (SIOS) portal: Download S7 Distributed Safety V5.4 SP5 Upd2 Key Requirements & Compatibility Operating System : To use this with STEP 7 V5.7
Before initiating the download, ensure your engineering workstation meets the minimum system requirements. Because V5.7 is an add-on, its compatibility is strictly tied to the host STEP 7 installation. s7 distributed safety v57 download link
For , there is no standalone "V5.7" version of the safety package itself. Instead, you use S7 Distributed Safety V5.4 SP5 alongside specific configuration updates to maintain compatibility with STEP 7 V5.7 . You can download the software directly from the