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Allen Bradley 1756-OF8I Warranty One Year 17560F8I
Should the contact be open when a ‘RUN’
command is given, an alarm will be issued and the 505E display will indicate that
the start permissive was not met (Start Perm Not Met). The alarm does not need
to be cleared but the contact must be closed before the 505E will accept a ‘RUN’
command. After a ‘RUN’ command has been accepted, the start permissive
contact will have no effect on operation. If used, this input is typically connected
to a Trip & Throttle valve’s closed limit switch to verify that it is in the closed
position before a turbine startup is performed.
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