The query most likely refers to the international industrial safety standard ISO 13849-2 , which is assigned the unique identification number 53640 in the ISO internal system .
: The 2012 edition is active but currently under revision. 53640 rar
Supporting (like the new Annex E for fault behavior). The query most likely refers to the international
: Specifies how to verify safety designs through documented logic and circuit analysis. 53640 rar