SIMATIC S7, safety programming tool; STEP 7 Safety Advanced Combo; V20 / Distributed Safety V5.4; engineering software; floating license for 1 user; software and documentation on DVD; license key on USB flash drive; Safety Advanced V20: class A, 2 languages (de, en), executable with TIA Portal V20 STEP 7 Professional V20; Distributed Safety V5.4 SP5: class A, 3 languages (de,en,fr), executable with STEP 7 V5.5 SP1; - - content: set (2x DVD + 1xUSB)