Interlogix NS2051-4P/1T - Manual (Page 12)

8 IFS MC251-4P/1S and NS2051-4P/1T User Manual
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Power 1 Fault Power 2
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Wiring the Fault Alarm Contact
The fault alarm contacts are in the middle of the terminal block
connector as the picture shows below. Inserting the wires, the
MC251-4P/1S and the NS2051-4P/1T will detect the fault
status of the power failure and then forms an open circuit. The
following illustration shows an application example for wiring
the fault alarm contacts.
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Insert the wires into the fault alarm contacts