Fixture Integrated Daylight Dimming Photosensor FD-301

The FD-301 Fixture Integrated Daylight Dimming Photosensor is a low voltage controller designed for mounting inside fluorescent lighting fixtures with standard 0-10 VDC electronic dimming ballasts. It provides precise, closed-loop daylight dimming control by measuring both daylight and electric light levels to maintain target illuminance. Ideal for daylit commercial spaces such as offices, classrooms, and cafeterias, this photosensor enables energy savings and enhanced lighting control when distributed by electrical distributors or integrated by lighting solutions providers.

Specifications

• Operating voltage: 24 VDC
• Power consumption: 9mA @ 24V DC
• Maximum sink current: 50 mA
• Dimensions: 1.57” x 0.98” x 0.84” (40mm x 25mm x 21.4mm) L x W x D
• Weight: 64.4 grams (2.27 ounces)
• Operating temperature: 32 to 104°F (0 to 40°C)
• Operating humidity: 5–95%, non-condensing
• Full range dimming output: 0.2 VDC (minimum) to 10 VDC (100% lighting)
• Includes 6’ (1.83m) lead with RJ45 connector and 1’ (0.3m) bare leads for 0-10 VDC signal
• Photocell spectral response matches human eye photopic curve
• Sliding setpoint control algorithm for separate day and night target illuminance
• Maximum ballast control: 50 ballasts
• Enclosure material: ABS, flame retardant
• Color: White
• UL and cUL listed
• Indoor use only
• Five year warranty

Features

• Closed-loop daylighting control considers both daylight and electric light levels
• Sliding setpoint control maintains desired light levels for day and night conditions
• Accurate light measurement using a photocell with spectral response matching human vision
• Separate handheld setup remote control (LSR-301-S) enables easy commissioning without tools or ladders
• Optional occupant remote control (LSR-301-P) allows temporary manual light level adjustments
• Automatic dimming smoothly adjusts lamp output to avoid occupant discomfort
• Boosts energy savings by reducing lamp output, often achieving 20% or more reduction compared to full output
• Compatible with Wattstopper FS-PP power pack and FS occupancy sensors for integrated lighting and occupancy control
• Meets RoHS material restrictions

Downloads & Links

• FD-301 Fixture Integrated Daylight Dimming Photosensor
• FD-301 OEM Data Sheet
• FD-301 Fixture Integrated Dimming Photosensor