LEGRAND Wattstopper FSP-212D Instructions D'installation page 4

Mode B – Continuous Dimming Control with Daylighting (Dim to Off )
Features: Adjustable photocell level to set desired light level when occupied
When the ambient lighting is below the desired light level and occupancy is
detected, the sensor turns the loads ON. The dimming level continually adjusts so
that the dimming amount combined with ambient light matches the desired light
level. If the ambient lighting is above the desired light level when occupancy is
detected, the load will remain OFF until the ambient light drops below the target
level, at which point it will adjust the dimming level appropriately.
Once no occupancy is detected and the time delay expires, the load fades down to
the Low Dim level, which is 50% of the High Trim level. As long as the area remains
unoccupied, the load stays at the Low Dim level for half the amount of the time
delay, and then load turns OFF. If the current dimming level is less than half of the
High Trim value, the load fades down to OFF without any time delay.
NOTE: With the photocell enabled in this mode (as well as in modes C and
D), the High Trim is used only to calculate the Low Dim amount. It
can therefore be set to an amount lower than the maximum dimming
amount, which is set based on the desired light level. For example: if the
High Trim level is set to 8V, in Mode B the Low Dim level will be 4V. But
if the desired light level is set high, the lights might go up to 9V or 10V in
order to reach the desired level.
NOTE: If the photocell is disabled in this mode (as well as in modes C and D),
the High Trim amount will be used to determine the desired light level,
as it does in Mode A.
Mode C – Continuous Dimming Control with Daylighting (Dim to
Low Level)
Features: Adjustable photocell level to set desired light level; a minimum
light level is always maintained.
When occupancy is detected and if the ambient lighting is below the desired
light level, the dimming level continually adjusts so that the dimming amount
combined with ambient light matches the desired light level. If the ambient
lighting is above the target photocell level, the dimming level will adjust to the
Low Dim level (20% of High Trim value).
Once the area is unoccupied and the time delay expires, the load level will fade
down to the Low Dim level (20% of High Trim value). The load will never turn
completely OFF.
Mode D – Continuous Dimming Control with Daylighting (Separate
Low Dim Levels when there is No Occupancy)
Features: Adjustable photocell level to set desired light level; a minimum
light level is always maintained, with separate day time and night time
minimum levels
During the day time, when occupancy is detected and if the ambient lighting
is below the desired light level, the dimming level continually adjusts so that
the dimming amount combined with ambient light matches the desired light
level. Once the dimming level reaches 40% of the high trim level, the sensor
will consider it to be night time and will behave as described in the following
paragraph. If the ambient lighting is above the target photocell level, the
dimming level will adjust to the Day Time Low Dim level (20% of High Trim value).
Additionally, when there is no occupancy and the time delay expires, the load level
will fade down to the Day Time Low Dim level.
During the night time, when occupancy is detected, the dimming level adjusts to
the desired light level. When there is no occupancy and the time delay expires, the
load level will fade down to the Night Time Low Dim level (40% of High Trim value)
in order to maintain a safe light level. Once the dimming level is less than 40% of
the high trim operation, the sensor switches back to day time operation.
In this mode, the load will never turn completely OFF.
NOTE: If the photocell is disabled, then the day time/night time behavior does
not apply. In this case, after the time delay expires the lights will dim to
40% of the High Trim level, and then after an additional 1/2 of the time delay amount, the lights will dim further to 20% of high
dim level.
Target Level
Desired
Light
Level
Low
Dim*
Desired
Light
Level
Low
Dim*
0
Desired
Light
Level
Low
Dim*
Desired
Light
Level
Low
Dim*
0
Target Level
Desired
Light
Level
Low
Dim*
Desired
Light
Level
Low
Dim*
Night Low Dim
0
*Low Dim = 40% of High Trim In Night Time, 20% in Day Time
If Photocell is disabled, initial Low Dim is 40%, then 20% after 1/2 time delay
4
Mode B
Lighting Loads
Night Day
Time Delay
1/2
Time
Delay
Occupancy
Dimming when
using Photocell
*Low Dim = 50% of High Trim
Mode C
Daylight
Lighting Loads
Night Day
Time Delay
Occupancy
Dimming when
using Photocell
*Low Dim = 20% of High Trim
Mode D
Daylight
Lighting Loads
Night Day
Time Delay
1/2
Time
Delay
Day Low Dim
Occupancy
Dimming when
using Photocell
Daylight
Night
Dimming with
Photocell disabled
Night
Dimming with
Photocell disabled
Night
Dimming with
Photocell disabled