Single-channel annual astronomic time switch for DIN-rail mounting, powered from 110-230 V AC at 50-60 Hz. Provides weekly, annual, holiday, impulse, cycle, astro and random programs with 300 memory locations, Bluetooth external programming and automatic summer/winter switching. Rated 16 A at 250 V AC through a potential-free changeover contact and offers a 10-year battery-backed reserve. Used in lighting, HVAC and process-control switching where seasonal and calendar-based schedules are required.