Data Sheet

8
I-2017, www.findernet.com
I
15 SERIES
Dimmers
15
SERIES
Thermal protection and signaling
LED (15.81 type only) Supply voltage Thermal protection
ALARM
The internal thermal protection (active on all dimmer types)
will detect an unsafe temperature, due to overload or incorrect
installation, and will turn the dimmer output off.
It is possible to turn the dimmer on, by push button, only when
the temperature reduces to a safe level (after 1 to 10 minutes,
depending on installation conditions) and after removing the
cause of the overload.
OFF —
ON —
ON ALARM
Functions - Type 15.81
Type Linear dimming
15.81…0500
Operating mode without memory: at switch-off, the
light level is not memorized.
Long control pulse: The light level is progressively
raised or lowered in linear way. The lowest value depend
on the “minimum dimming level” regulator setting.
Short control pulse: Alternately switches between On
and Off between the maximum light level and the off
state.
Operating mode with memory: the previous light
level is memorized.
Long control pulse: The light level is progressively raised
or lowered in linear way. The lowest value dependent on
the “minimum dimming level” regulator setting.
Short control pulse: Alternately switches between On
and Off. When switching On, the light level assumes
the value set during the previous On state.
Type of load Selector setting Regulator setting
With memory (M) Without memory (M)
• Incandescent lamps
• 230V halogen lamps
• 12/24V halogen lamps with
electronic transformer/ballast
It is suggested to set the “minimum dimming
level” at the lowest value, so that the
complete dimming range is available. But
if it is necessary to avoid too low a level of
illumination, a higher value can be set.
• Dimmable compact
fluorescent lamps (CFL)
• Dimmable LED lamps
It is suggested to initially set the “minimum
dimming level” at an intermediate value and
then if necessary, readjust for a level found to
be compatible with the lamp being used.
• 12/24V halogen lamps
with toroidal or E-core
electromagnetic transformer
It is suggested to set the “minimum dimming
level” at the lowest value, so that the
complete dimming range is available. But
if it is necessary to avoid too low a level of
illumination, a higher value can be set.
Leading edge dimming
Trailing edge dimming
Light dimming is realized with “phase cutting technology”, which works by “cutting off” part of the mains voltage waveform in order to reduce the RMS
voltage fed to the lamp. When the “cut off” part is at the beginning of each half cycle the dimming method is called Leading Edge. When it is towards
the end of each half cycle, it is called Trailing Edge. These 2 methods are suitable for dimming different lamp types: Trailing Edge is, in general, more
suitable for electronic transformers for low voltage lamps (halogen or LED). Leading Edge is better suited for electromagnetic transformers for LV lamps,
230V CFL and 230V LED lamps. Both methods are, however, suitable for dimming 230V halogen and incandescent lamps.
In consideration of the different lamp types actually available on the market, it is suggested to refer to the technical specification indicated in page 3
and, if given, to the lamp manufacturer’s recommendation.