Because Distributed Safety involves industrial security and high-level encryption protocols, the download link is strictly subject to export control restrictions.
Using unofficial software downloads poses severe risks: s7 distributed safety v57 download link
Update 2 for V5.4 SP5 (released to improve stability and support newer OS versions). s7 distributed safety v57 download link
STEP 7 Distributed Safety is the legacy engineering software used to configure and program fail-safe SIMATIC S7 PLC systems, including S7-300, S7-400, and ET 200 CPUs. If you are working with classic STEP 7 V5.7 or maintaining older automation infrastructure, having the correct safety package version is critical for hardware compilation and system compliance. s7 distributed safety v57 download link