REX640 Firmware Release 1.2.2 Release Note

This document is a release note for firmware version 1.2.2, applicable to REX640 protection relays and LHMIs delivered before June 27, 2022, with Product Connectivity Level 3 (PCL3) and existing firmware versions 1.2 or 1.2.1. It details how to verify the update applicability via LHMI or WHMI, and lists implemented usability improvements, including an enhancement to the ASGCSYN autosynchronizer function for generator breaker close command activation.