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REX640 Firmware Update Release 1.1.4

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This document is a release note for firmware update version 1.1.4, applicable to REX640 (PCL2) protection relays and LHMI units manufactured before May 30, 2022. It details required version checks, implemented usability and operational improvements, including cyber security fixes for CVE-2021-22283 and CVE-2022-1596, as well as enhancements to IEC 60870-5-104 communication and IEEE 1588 PTPv2 time synchronization.

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