Once you have a verified copy, store it on an encrypted, write-protected archive drive. Treat DIGSI 491 as the critical engineering tool it is—because in the world of protection relays, there is no "undo" button for malware.
Siemens reserves the right to move these downloads behind a royalty fee in the future, so it is best to secure your official version soon. SiePortal - Siemens Industry Online Support siemens digsi 491 download verified
portal. While newer versions like V4.96 and V5.00 are now available, V4.91 remains a common requirement for legacy SIPROTEC 4 protection devices. Official Download and Access SiePortal (SIOS) : You can find the full version and device drivers on the Siemens SiePortal Once you have a verified copy, store it