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120/277V Wall Switch Occupancy Sensor with Push-button
The SK901 can be used for automatic switching of lighting, incandescent, fluorescent and low-voltage lighting with electronic or magnetic ballasts, with the addition of an auxiliary relay unit, even HVAC can be controlled. The unit also features a manual override that can be used to keep lights OFF while an area is occupied, which may be desired during slide or film presentations. The unit replaces a single-pole wall switch and fits in the standard wall box. The unit requires a ground connection for the model 901IE with PIR detection and a Neutral connection for the 901UN( Ultra sonic detector) and 901IN(PIR detection). The SK901 series All have dual technology sensors.( PIR sensor with microphonics, Ultra sonics with microphonics)
APPLICATION
The Sharkward SK901 dual technology Sensors Wall Switch uses Passive Infrared (PIR)combined with microphonics or Ultra-sonic Doppler detection with microphonics as an Occupancy Sensor to provide automatic control of lighting for energy savings and convenience in a variety of applications.
Small offices . Conference rooms
Lounges . Class rooms
The SK901 can be used for automatic switching of lighting, incandescent, fluorescent and low-voltage lighting with electronic or magnetic ballasts, with the addition of an auxiliary relay unit, even HVAC can be controlled. The unit also features a manual override that can be used to keep lights OFF while an area is occupied, which may be desired during slide or film presentations. The unit replaces a single-pole wall switch and fits in the standard wall box. The unit requires a ground connection for the model 901IE with PIR detection and a Neutral connection for the 901UN( Ultra sonic detector) and 901IN(PIR detection). The SK901 series All have dual technology sensors.( PIR sensor with microphonics, Ultra sonics with microphonics)
OPERATION
The SK901 uses passive infrared (PIR) detection technology or Ultra sonic Doppler detection to monitor a room for occupancy, any movement by a person will cause the detector to register that movement and energise the lighting. After the primary detector (PIR or Ultra Sonics) engages then the sound detection system comes into operation to keep the status of the detector as “Occupied” even though there is no detectable movement. The lights will remain ON as long as there is a noise or an occupant moving through the sensor zones.
A OFF delay time adjustment prevents the lights from switching OFF when the space is occupied. In order to keep the lights ON, noise must be generated, either from talking or any other activity, at least once during the selected OFF delay time interval. An LED indicator blinks to denote activity is sensed in the sensor zones. When the space being monitored by the sensor is unoccupied for the length of time chosen as the OFF delay interval, the unit will switch the lights OFF.
To ensure longer service life and compatibility with electronic ballasts, the device carefully times its switching contact opening and closing with the zero crossing point of the AC power curve. This minimizes contact wear caused by in-rush currents from electronic ballasts.
120/277V Wall Switch Occupancy Sensor with Push-button Manual Override Control