Siemens 3RP1574-1NQ30 Sirius timing relay is an electronic timer with star-delta (wye-delta) functionality, featuring two normally open outputs: one instantaneous and one delayed, to coordinate motor-start sequences in control circuits. It provides a single timing range of 1 to 20 seconds and accepts either 24 V AC/DC or 100–127 V AC at 50/60 Hz, wired via AC screw terminals. Designed for DIN-rail mounting, the device carries a front IP40 enclosure with IP20 protection at the terminals, enabling timed switching of loads in compact panels.
