Installation manual

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