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SPECIFICATION SUBMITTAL
MW-FPS-1 11.22.04
Daylight Sensor
MW-FPS-WH
Fixture Mountable Daylight Sensor
This daylight sensor is designed specifically to work with
Lutron's Lighting Control Systems to implement daylight
harvesting. It allows the Lighting Control System to
automatically dim the lights when the available daylight is
high, and brighten the lights when the available daylight is
low, in order to maintain a specific light level in the space.
Features
• Meets IEC 801-2. Tested to withstand 15kV electrostatic
discharge without damage or memory loss.
• Photopic response matches human eye.
• Constructed of Flame retardant material with UL94 HB
rating.
• Mounts easily on any ceiling tile or fixture with 3/8 in. (10mm)
diameter hole.
• Threaded mounting stud (may be shortened for applications
with limited fixture height).
• Calibrated for daylight sensitivity through the Lighting Control
System to which it is attached.
• Designed to replace the MW-PS in any application.
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SPECIFICATION SUBMITTAL
MW-FPS-2 11.22.04
Daylight Sensor
MW-FPS-WH
Specifications
Standards
• Designed for Class 2 operation only. Voltages do
not exceed 35VDC. Complies with requirements
of NFPA 70, of the National Electric Code (NEC)
• Follow all applicable national and/or local wiring
regulations when installing this sensor
• Designed to give a linear response to changes in
viewed light level
• For use with Lutron products only
Power
• Operating Voltage: Low-voltage Class 2, 15VDC
• Analog Signal: 0 - 500uA
Environment
• Temperature: 32-113°F (0-45°C)
• Relative humidity: less than 90% non-condensing
Dimensions
Sensor lead length = 4” (101mm) minimum beyond
threaded stud.
Total wire length from sensor to device must not
exceed 200 ft (61m).
Threaded Stud Diameter = 3/8” (9.5mm) maximum.
Use 3/8-16 wing nut (provided) for mounting.
LUTRON
1.25” (32mm)
0.69” (17mm)
1.18” (30mm)
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SPECIFICATION SUBMITTAL
MW-FPS-3 11.22.04
Daylight Sensor
MW-FPS-WH
Mounting
Determine the proper location of the Daylight
Sensor using the adjacent diagrams.
• The arrow on the Daylight Sensor defines the viewing
direction
• Place the daylight sensor so its viewing area is
centered upon the nearest window at a distance of
between 1-2 H from the window
• The effective window height, H, starts 3 feet up from
the floor or at the windowsill, whichever is higher,
and ends at the top of the window.
• Ensure that the view of the Daylight Sensor is not
obstructed
• Do not position the Daylight Sensor in the well of a
skylight or above indirect lighting fixtures
Mount the Daylight Sensor
• Drill a 3/8 in. (10mm) diameter hole in the ceiling tile
or indirect fixture mounting surface
• Thread the wires up through the hole
• Install the Daylight Sensor into the hole
• Secure the Daylight Sensor with the mounting
hardware provided (hand tighten only).
Note - If the stem of the Daylight Sensor must be
shortened due to its location (for instance, in a
pendant fixture) this should be done prior to wiring.
Ceiling Tile or Fixture
Arrow points toward the area
viewed by the sensor
3ft (0.9m)
H
1-2H
Bottom of sensor
H = Effective Window Height
Wiring
• Wire color designations:
Yellow = Daylight
Black = Common
Red = 15VDC
To a Lighting Control System
• Make sure that the supply breaker to the control
system is OFF
• Connect the three conductors to the appropriate
terminals of the lighting control system
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