Acumen AiM 108CH - Manual (Page 47)

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Chapter 12-4. Remote Alarm Input (DI) & Digital Alarm Output (DO)
If a camera is equipped with a digital input and an digital output, a user can configure the digital
input (DI) triggered by an access control or an digital relay input. AIM Software HD 2.6 is
capable of receiving the digital signal from a camera via network. After receiving the alarm
signal, AIM Software HD 2.6 can trigger various alarm outputs including the digital output. The
digital output signal is sent to the IP camera via network for external alarm devices such as a
siren light or a door lock built-in with a relay input. The following diagram shows digital input
marked as DIN and a relay output with triggering state N.O. (normal open).