NT 22 , NT 32 and NT 42 have special logic functions, which cause them
by pressing one of the pushbuttons BRIGHT or PRESET to check if the device
is in OFF position. If yes it will first switch ON and then start dimming
brighter. On the other hand, the command DARK dimms to minimum level and
automatically turns OFF 3 sec. after reaching the minimum light value.
Furthermore the devices are capable to store the last light value, i.e.
the last value is stored in the dimmer and the previous dim state can
be retrieved if needed.
As an option the devices can be equipped with LED status control which
shows the choosen function in the control tableau.