Presence detector for ceiling mounting indoors. The sensor module detects moving heat sources (e.g. people) in an adjustable detection range and starts a staircase lighting time. For ohmic, inductive and capacitive loads such as incandescent lamps, energy-saving lamps, low-voltage halogen lighting with conventional transformers, electronic transformers, fluorescent lamps. The sensor module has a light sensor with an adjustable brightness threshold so that the lighting is only switched on below a certain brightness threshold. The presence function allows the sensor module to switch the lighting off despite a person being present if there is sufficient natural light. For installation in a 60 mm flush-mounted box or in the surface-mounted housing available as an accessory. With claw and screw fastening. With screw terminals. Functions -Switching of two outputs. External control via two PL inputs (sensor module on central unit insert (slave), extension unit plus). Switching. Brightness-dependent staircase light function with channel 1, brightness-independent staircase light function with channel 2. Nominal voltage AC 220/230 V, 50/60 Hz. Nominal current max. 10 AX, cos Phi 0.6. The total load of both channels must not exceed 14 A. Outputs 2x normally open. Max. switching capacity per channel incandescent lamps 2200 W. HV halogen lamps 2000 W. LV halogen lamps with wound transformer 500 VA. Electronic transformers 1050 W. Capacitive load 10 A, 140 uF. Energy saving lamps 100 VA. Motor load 1000 VA. Neutral conductor required (3 conductor system). Connection cross-section max. 2x2.5 mm². Detection angle 360 degrees. Number of levels 6. Number of zones 136. Number of motion sensors 4. Recommended installation height 2.5 m. Range radius of max. 7 m (at an installation height of 2.50 m). Sensitivity continuously adjustable. Brightness threshold continuously adjustable from approx. 10 to approx. 1000 lux. Follow-up time channel 1 continuously adjustable from approx. 10 s to approx. 30 min. Channel 2 continuously adjustable from approx. 5 min to approx. 2 hrs. Accessory surface-mounted housing for ARGUS Presence 550619. Color polar white.