trk-101 Installation Manual
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A.6.
N/O to N/C Relay Configuration
The on-board relay in the sc1dn-S provides a single contact which is by default NORMALLY OPEN (N/O),
enabling it to be configured to CLOSED upon an alarm condition. This is usually configured with a
momentary closure (for example, five seconds), followed by returning to the OPEN condition, to be ready
for the next alarm event.
Should a NORMALLY CLOSED (N/C) condition be preferred, the relay may be configured by selecting one of
the following two events in the Event Engine:
Event 1: Triggering event = Power ON
o
Action = Activate relay contact – continuous ON
Event 2: Triggering Event = Detection Alarm (according to your configuration)
o
Action 1 = Activate relay contact – continuous OFF – immediately
o
Action 2 = Activate relay contact – continuous ON – after five seconds
The above conditions will turn on the relay at Power ON. An alarm will open the relay for five seconds and
close it again.
The above conditions also will create an alarm indication in case of a loss of power.
Note:
The unit must be rebooted after configuration in order for this setting to take effect.
Note:
Event 1 can also be replaced by Triggering Event = ARM. In this instance, the relay will
be OPEN until the unit is armed, at which time it will behave as described above. This
may be desirable in some deployments.
