Konig SEC-DVRMON30 - Alarm; Alarm Input Channel; Alarm Input Type

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5.6 Alarm
Next menu tab in the System Menu is Alarm. Under this tab the administrator can define
how the DVR will respond to various alarms from the alarm inputs and adjust Alarm input /
output settings.
5.6.1 Alarm Input Channel
Select alarm input channels to which the configurations adjusted below will apply. For each
or all cameras, you can setup various kinds of behavior. You have a choice of channels 1
through 4 and ALL – to have the settings apply to all channels.
5.6.2 Alarm Input Type
This field allows you to choose between the N.O. (Normally Open) and N.C. (Normally
Closed) options.
N.O.: Normally open type. It means that in the normal state, the sensor device is kept
under constant low voltage. If output voltage changes from low to high, then the
alarm is triggered.
N.C.: Normally closed type (also – “normally connected”). The normal state of the sensor
device is under constant high voltage. If output voltage changes from high to low,
then the alarm is triggered.