Input for alarm filter
The NRT provides an input that enables alarm filtering according to the requirements of EN 81-28:2022.
The input is preconfigured for alarm filtering ex works.
If alarm filtering is not used, the input may remain unconnected.
Connection example:
Notes on filter mode
-
No Alarm with active filter
If the contact is closed and the “Alarm filter” function is active, NRT will not initiate an alarm. -
Filtering not active during an active alarm
If an alarm is already active (not yet completed), the filter remains inactive and the alarm is processed as usual. -
Test while filter is active
To trigger a real alarm while the alarm filter is active, press and hold the alarm button for more than 30 seconds.