Busch-Jaeger 6411 U-101 Betriebsanleitung Seite 72

Brightness sensor ENG 72
24 Brightness sensor
The brightness sensor 6414 can only be
used in conjunction with the 6411U/S-101 flush-mounted
insert.
a. Function
Sunshade function
Can be combined with operating modes N, L.
Precondition for the faultless sun protection functionality is
that the shutter can cross the sensor. If this is not ensured,
then the sun-blind function (see operating mode M) must
be used.
The sensor constantly measures the brightness and
compares this value with the pre-set threshold value. If the
threshold value is exceeded for more than 90 seconds, the
shutter moves downwards.
As soon as the shutter obscures the sensor, the downward
movement is stopped. The shutter is moved upwards
again and stopped just above the sensor position.
The shutter is not moved into the upper end position again
until the sensor measures a value which remains below
the pre-set threshold value for more than 15 minutes, or an