Photocell & Daylight Harvesting

SWX-250 SERIES
LINE VOLTAGE

Series Downloads

Overview

SENSORWORX line voltage photocell and daylight harvesting sensors provide a compact control solution without requiring a powerpack. Basic on/off units are capable of directly switching lights off when ambient levels are high enough that desired overall light levels will be still be maintained. Lights will be switched back on once ambient level falls below the desired setpoint.

Units with the daylight harvesting (dimming) option track a space’s overall illumination and dim connected lighting to achieve energy savings. During times of high daylight contribution to a space, controlled artificial lighting will be gradually dimmed to a minimum dimmed level. During times of no or low daylight contribution, controlled artificial lighting will increase back up to its maximum level. The sensor can also be configured to switch lighting off completely in maintained high daylight conditions. Additional configurable parameters include high & low trim levels and fade rates.

All photocells provide the option of selecting the ambient light threshold (e.g., setpoint) from a range of preset values or running an auto-selection mode where the unit will determine the setpoint based on the measured amount of light it is controlling.

Applications

There are two types of photocell operation; ON/OFF PHOTOCELL CONTROL and DAYLIGHT HARVESTING CONTROL (see descriptions below).

 

On/Off Photocell Control
  • Recommended for public spaces (hallways, entryways, etc) where fully switching lighting off/on will not be noticed .

  • Photocell will switch lights off if ambient light level surpasses threshold and back on if level drops.

  • To prevent cycling of lights back on after lighting is turned off, a “deadband” level equal to the measured level of light being controlled is continuously maintained in the unit. For lighting to turn off the ambient light level must be higher than the sum of the setpoint and the deadband.

 

Daylight Harvesting Control
  • Recommend for spaces where it is important to not distract occupants (e.g., offices, classrooms).

  • Unit will gradually dim lighting in order to maximize energy savings while maintaining desired overall lighting level.

  • After dimming to low trim level, unit can optionally be enabled to turn off lights completely.

Features / Photocell & Daylight Harvesting

  • Auto-Setpoint Selection Mode

  • On/Off Control and/or Daylight Harvesting (Dimming)

  • Adjustable High & Low Dimming Trim Level

  • Electronically Timed Switching Designed for LED Fixture Control

  • Compact Size and Matte Finish

Specifications

Physical

SIZE
4.00” Diameter x 1.25” Height
(10.16 cm x 3.17 cm)

WEIGHT
4.75 oz.

COLORS AVAILABLE
White

MOUNTING STYLE
Mud Ring w/ 2.75” Spaced Ears
3.5” Trade Size Octagon Box

Environmental

OPERATING TEMPERATURE
32°F to 122°F
(0°C to 50°C)

RELATIVE HUMIDITY
0-95% Non-Condensing
Indoor Use Only

ROHS COMPLIANT

Electrical

OPERATING VOLTAGE
MVOLT (120-277 VAC)

LOAD RATINGS
800W @ 120 VAC
1200W @ 277 VAC

LOAD TYPES
LED Driver/Lamps
CFL, Electronic/Magnetic Ballasts (Fluorescent)
Tungsten (Incandescent)

DIMMING CAPACITY
50mA

DIMMING COMPATIBILITY
0-10 VDC Ballasts or Drivers
Compliant with IEC 60929
Annex E.2

Operation

Daylight Harvesting to Low Trim

Daylight Harvesting to Off

Photocell Override (On/ Off)

Code Compliance

Sensors can be used to meet
ASHRAE 90.1, IECC, & Title 24
energy code requirements

Wiring Diagrams

On/Off Photocell Application

Daylight Harvesting Application

Installation Options

Basic Mounting Options

Additional Mounting Options Using SWX-299 Trim Ring

Ordering Info

EXAMPLE MODEL # SWX-250-2-D
 PRODUCT VOLTAGE OPTIONS 
SWXCeiling Mount Ambient Daylight Photocell250Line Voltage2Dimming / Daylight Harvesting (0-10V)D
ACCESSORYDESCRIPTION
SWX-299Ceiling Sensor Trim Ring for Single Gang Mudring, Handy Box, or 4” Octagon Box

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