311P Ceiling PIR Detector (IP55). Available only as spare parts, not for new cases. Alternative products 320 and 320P. (Discontinued)

The 311P Ceiling PIR Detector is an IP55 certified version of the 311 Ceiling PIR Detector, a compact unit that provides energy-saving functions in a DALI system. It contains a Passive infrared detector (PIR) and an Infrared receiver. As a presence detector, the unit can turn the lights on when a room is occupied, and off when the room is unoccupied.