WWW.LEGRAND.US/WATTSTOPPER WATTSTOPPER ® SENSORS Description The WS-250 Passive Infrared (PIR) Wall Switch Sensor turns lighting on and off based on occupancy and ambient light level. It replaces existing wall switches and fits behind a standard decorator wall plate. Operation The WS-250 utilizes advanced PIR technology to detect occupancy. Detection occurs when the WS-250 senses the difference between infrared energy from a human body in motion and the background space. Lighting automatically turns on when occupancy is detected. After a user-specified length of time when no occupancy is detected, lighting automatically switches off. The sensor can also be used with line voltage switches for multi-level lighting. Light Level Sensor The WS-250 features a built-in light level sensor. This feature holds lighting systems off when natural light levels are above the preset level. Once lights are switched on, the sensor will not switch them off even if daylight levels increase. Using the light level feature is optional and the setting is adjustable by the user. Applications The WS-250 has the flexibility to work in a variety of applications including offices, conference rooms, break rooms and utility rooms. Energy savings for these areas can be as high as 60% since lighting will no longer remain on once the room is vacant. With a competitive price, low installation cost, and high energy savings, paybacks are usually well under two years. PASSIVE INFRARED WALL SWITCH OCCUPANCY SENSOR WS-250 180° coverage, maximum of 900 ft 2 Button provides positive tactile feedback Compatible with all electronic ballasts Shallow (1”) back housing and flying leads for easy installation Dual voltage model, 120/277 VAC Built-in light level sensor OCCUPANCY & VACANCY • Pulse Count Processing eliminates false offs without reducing sensitivity • Detection Signature Processing eliminates false triggers; provides immunity to RFI and EMI • Zero crossing circuitry reduces stress on the relay and results in increased sensor life • Time delay adjustment from 30 seconds up to 30 minutes • Adjustable unit sensitivity from 20% to 100% • Light level sensor holds lights off when ambient lighting is above the preset level • Custom two-tier Fresnel lens enhances detection at the desktop level • Sensor coverage tested to NEMA Guide Publication WD 7-2000 • Patented voltage drop protection • For safety, there is no leakage to load in the off mode and sensor is safety grounded • LED indicates occupancy detection • Compatible with decorator wall plates • BAA/TAA-compliant models available FeaturesAuto-off Switch Light Level Time Delay Sensitivity LED Fresnel Lens Factory settings: 30-minute time delay, maximum light level and sensitivity 1” Extremely shallow (1”) back housing and 6” flying leads facilitate quick installation in standard wall box Load Load Line Ground Neutral Load Load Ground Load Line Neutral PIR Coverage 7.5’ (2.2m) 20’ (6.1m) 35’ (10.6m) Major motion Minor motion • 120/277VAC, 60Hz, or 347VAC, 60Hz • Time delay adjustable from 30 seconds up to 30 minutes • Adjustable unit sensitivity from 20% to 100% • Adjustable light level setting of 2 to 200 footcandles (21.5 to 2,153 lux) • Compatible with all electronic ballasts and PL lamp ballasts • Coverage: Major motion 35’ x 30’ Minor motion 20’ x 15’ • Dimensions: 2.6” x 1.7” x 1.55” (66.0mm x 43.1mm x 39.4mm) L x W x D • UL and cUL listed • Five year warranty Specifications Controls & Installation Product ControlsInstallation Coverage & Wiring Coverage PatternSingle Level Lighting Ordering Information Manual Bi-level Lighting Catalog #ColorVoltageLoad Rating WS-250-W WS-250-W-U White120 VAC; 60 Hz or 277 VAC; 60 Hz @ 120 VAC, 0-800 W ballast or tungsten or 1/6 hp @ 277 VAC 0-1200 W ballast WS-250-LALt. Almond WS-250-I WS-250-I-U Ivory WS-250-GGrey WS-250-BBlack WS-250-347-WWhite 347 VAC; 60 Hz0-1200 W ballast WS-250-347-IIvory WS-250-347-GGrey WS-250-347-BBlack 4’ (1.2m) 20’ (6.1m) 35’ (10.6m) 0 For best performance, Wattstopper recommends using this sensor in spaces no larger than 15’ x 12’. Order wall plate separately. -U = BAA/TAA compliant; product is compliant with Buy American Act and Trade Agreement ActNext >