ABB ACS880-11 - Replacing Safety Functions Modules (FSO-12, Option +Q973 and FSO-21, Option +Q972)

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Replacing safety functions modules (FSO-12, option +Q973
and FSO-21, option +Q972)
Do not repair safety functions modules. Replace a faulty module with a new one as
described in section Installation of safety functions modules (page 106).
158 Maintenance