Models: db Nexus II, Nexus III Digitus Biometrics, Inc. 2011
Page 16 of 20
Alarm Output
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Certain conditions that occur on the unit will cause the Alarm Relay to operate. The Alarm Relay can be used to
interface the control unit with a 3rd party system. When one of the following conditions happen, the 3rd party
system will be alerted.
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The following will send an alarm alert:
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Tamper detected on the head unit
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A forced door
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A door being propped open
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The duress feature being activate
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A tamper detected on the door sensor circuit (when used in conjunction with an anti-tamper door sensor)
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The alarm relay is connected as per the diagram below.
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Alternatively the alarm relay can be used to power a 3rd party buzzer or siren.
