IBM EDR1600 - Manual (Page 33)

Administrator’s Guide and Operating Instructions
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Normal State – NC or NO, please check the signal types connected
to the Alarm Input Terminal on the rear panel of the system. Use
the Down arrow button to select the signal type.
Enable Alarm Action – Check to Enable Alarm Action for the
selected Alarm Input at the selected Time Type.
Alarm Action – The corresponding Alarm Action if the Alarm Input
changes its state from normal to alarm. Up to 16 Alarm Actions
are selectable.