Hi !
If your detectors send ON and OFF use a binary sensor (device class motion if you like - but that only changes the icon and wording, not the function).
If your devices only send ON repeatedly use a knx_event.
If it only sends 1 (no 0), you can use a binary sensor with reset_after.
But I’d recommend to just use a KNX interface telegram device trigger instead of an entity. See https://youtu.be/O3p3dISvTtI