ATV NV237, User Manual, Page: 38 / 88

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Alarm In
This camera provides 1 Alarm In port and user can set the port. The Port can be given as
Normally Open or Normally Close state, and its Normal state can be configured. In order to
use the alarm port, check the “Enable alarm port 1” first.
•
Type: Choose the type of alarm to use from the drop-down list, NO (Normally Open)
or NC (Normally Closed).
•
Dwell Time: Set the dwell time an event lasts from the point of detection of an alarm
input.
When the settings are complete, click Save button to save the settings, or click Reset button
to clear all of the information you entered without saving it.