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REX640 PCL2 Protection and Control Relay Firmware Release Notes 1.1.7

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This document is a release note detailing firmware update version 1.1.7 for ABB REX640 PCL2 protection and control relays, including scope verification criteria and implemented usability improvements. It also lists improvements from previous firmware releases (1.1.6 and 1.1.5) covering communication, control, measurement, protection, supervision, HMI, and monitoring enhancements.

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