Passive infrared models are available in four variations: a ceiling unit, aisle high-bay and aisle long-range wall-mount units for extended distance sensing and a wide-view unit for wall- or ceiling-mount applications. These units require direct line-of-sight, responding to movement of heat-emitting objects as they pass through a sensor’s field-of-view.
Ultrasonic models fill a room with continuous high-frequency (ultrasonic) sound waves and interpret changes from the original frequency as movement. They respond by turning ON lights or maintaining illumination. These devices are ideal for applications where either direct-line-of-site detection is not possible or movement is limited, such as in bathroom stalls and workplace cubicles.
All models feature built-in photocells to prevent controlled lighting from turning ON when the coverage area is adequately lit by natural light and are designed for connection to a Leviton Power-Pack. This device contains a 24VDC power supply for the sensors as well as either a 20 Amp relay for switching 120/220/277VAC incandescent or ballast lighting loads or a 15Amp relay for similar 347VAC loads. In addition, all HVAC relays have been eliminated from the sensors and replaced with a single HVAC connection on the power pack. This simplifies installation and avoids redundancy where an area is covered by multiple sensors that are connected to the same power pack. This device and companion Leviton Add-A-Relay Units (used to expand the control capacity) are designed for easy mounting on junction-box knockout holes.
For more information about Leviton, visit www.leviton.com.