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 close. Three setting ranges for the response threshold Range 1 2 to 50 lux. Range 2 60 to 300 lux. Range 3 350 to 2100 lux. Time-delayed switching on and off Adjustable between 20 - 140 seconds. External input as an extension. Testing of the wiring using a button on the device. Brief instructions in the storage compartment. For mounting on TH35 top hat rails in accordance with EN 60715. Functions -56 memory locations. ON-OFF switching times. Holiday program -Display lighting (can be switched off). Summer/winter time changeover -Automatic, can be deactivated, changeover rules for Europe, USA and other countries are already stored, own changeover rule or changeover according to a fixed date can be selected. PIN coding. 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. External inputs 1. 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 device IP 20. Device width 2.5 HP approx. 45 mm. Scope of delivery External light sensor CCT15260.