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IPS42 Internal Power Supply Installation and User Guide (11/09)
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3.3 Hardware operated Alarm Contact
The two screw Alarm Contacts
feature, standard on Magnum IPS42-Series,
provides Normally Closed (NC) contacts to
which the user can attach one set of status
monitoring wires at the green terminal block.
The NC Alarm Contact is held
close when there is power on the main board
inside of the IPS42. This provides a
“Hardware operated Alarm” because the NC
contacts will open when internal power is
lost, either from an external power down
condition or by the failure of the power
supply inside of the Magnum IPS42-Series Power Supply.