Twilight switch for brightness and time-dependent control of lighting systems. The lighting system is switched on as soon as the set brightness threshold is undershot or the time control allows the relay to be closed. Programming is done on the device or using the Acti 9 Light and Time Switch smartphone app via Bluetooth stick. The Bluetooth stick is also used as a memory card. Can also be programmed via PC using the CCT15860 programming kit. CCT15494 External input as an extension. Adjustable threshold from 1-99,000 lux. Delayed switching on and off adjustable from 0 to 5959 minutes. Brief instructions in the storage compartment. For mounting on TH35 top hat rails in accordance with EN 60715. Functions -Holiday function. Time-limited or permanent deactivation of the on and off functions. Automatic or manual switching from summer/winter time. Operating hours counter Display of operating hours per channel. Permanent display on the LCD display of hours and minutes, day of the week. Status of the output contact and the current program. Backlight of the display. Nominal voltage AC 230, -15%/+10%, 50/60 Hz. Switching capacity max 16 A, AC 250 V, cos phi1, 10 A, AC 250 V, cos phi0.6. Switching capacity min 10 mA, AC 230 V, 100 mA, AC/DC 24 V. Contact potential-free. Standby power 0.3 W. Incandescent lamp load 2600 W. Halogen lamp load 2600 W. Fluorescent lamp load uncompensated 2300 VA, series compensated 2300 VA, parallel compensated 730 VA (80 uF). Compact fluorescent lamps 170 W. LED 2 W 200 W. Connections screw terminals, rigid/flexible 2x0.5 - 2.5 mm2, with wire end ferrule max. 1x2.5 mm2. Controls 4 buttons for menu navigation. Accuracy 7+/-0.25 s/day (25 degrees C). Power reserve 10 years. Protection class IP 20. Device width 2.5 HP approx. 45 mm. Scope of delivery External light sensor CCT15260.