American Fibertek Net I/O N-111 - Manual (Page 32)

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Alarm Setup
The Alarm Setup screen is used to configure the N-111’s alarm input, and the actions to
be taken when the input is triggered. The hardware alarm contact inputs can have its
trigger conditions and actions independently configured.
Alarm settings
The alarm input has an associated user-settable text label. The alarm name label is
supplied along with the number when reporting the status of an alarm input to a Pilot
server. This label may be up to 15 characters long.
The Input Type setting selects if the normal (non-alarm) state is if the contact input is
closed or if the contact input is open. In Normally Open mode an alarm will be
registered when the two contact input terminals are shorted to each other. In Normally
Closed mode an alarm will be registered when the two contact inputs are not shorted to
each other. The default mode is Normally Open.
The Supervision setting selects if the alarm input is a normal contact closure or a
supervised contact closure. In supervised mode the contact closure will only be
registered if a 1K resistance value is measured across the alarm input terminals. An
open circuit and a short circuit will both be detected as no contact closure. The default
mode for Supervision is Normal (non-supervised) contact mode.
The duration setting sets a minimum time for which the alarm condition must be
maintained before an alarm is triggered. Setting the duration to “Static” will cause the N-
111 to trigger an alarm the moment it detects an alarm condition. If a longer duration is
Setting Default Value Range
Name “alarm-N” 15 characters
Input Type Normally Open Normally Open
Normally Closed
Supervision Normal Normal
Supervised
Duration 1 second Static
1,5,15,30,or 45 seconds
1 or 5 minutes