Data Sheet
14
X-2017, www.findernet.com
J
18 SERIES
PIR movement and presence detectors 10A
18
SERIES
Functions
Type Functions
18.51…0040
Movement
Lux
Push-button function
A control pulse on the push-button inverts the status of the output relay, until the timing after the last movement detected is elapsed.
Dynamic Light Compensation
By incorporating Finder’s Patented “light feedback compensation” principle, the 18.51…0040 is able to calculate the artificial light contributed by
the lamps controlled by the output relay. In effect, this means the 18.51…0040 is able to continuously monitor the natural ambient light level,
even when the output is On. As a consequence, whenever the natural light level exceeds the threshold setting the output is forced Off.
This can significantly minimises the time the lighting is On, particularly where there is a high level of traffic - and cost savings can be considerable.
This is an advance over other types of movement detectors, which are unable to identify the natural ambient light level when the output is On
and so can only turn Off after the time delay that follows the last detected movement. In busy areas this may mean that the movement detector
is being continuously re-triggered and maintained in the On state, even though the natural light level has long risen above the threshold.
18.5D
100%
OFF
Lux
Movement
Comfort - Daylight-linked constant light level
control
Adjusts to maintain a constant brightness level
considering the detection of movement and the
level of daylight - increasing or decreasing the
power of the artificial light as appropriate.
Suitable for small offices, classrooms or workplaces.
This allows considerable energy saving while
maintaining a comfortable level of illumination.
OFF
Lux
Movement
100%
50%
Simplicity - ON/OFF control with early warning
Works as a simple movement detector, activating
the lamps at 100% power. But provides an early
warning of the next shutdown with a power
reduction to 50% for 20 seconds.
Avoids a sudden total shutdown of lighting.
OFF
Lux
Movement
100%
50%
10%
Courtesy - ON/OFF control with early warning +
courtesy light level
If the brightness level is lower than the set
value, artificial light is maintained at 10% power,
guaranteeing a minimum level of illumination at
all times. When movement is detected, the power
of the lamps is raised to 100%. There is an early
warning of any reduction from the 100% power
level by a reduction to 50% for 20 seconds.
Suitable for common areas, lobbies, corridors,
elevator zones.
18.91
Lux
Movement
Detection of movement
Detected movement closes, or keeps closed, the
output contact.
Operating the push-button closes, or keeps closed,
the output contact - for the set time T.