Siemens 3RP1505-2BQ30 is a SIRIUS timing relay with two changeover contacts, designed for precise timing and sequencing in control circuits. It provides 16 programmable timing functions across 15 time ranges spanning 0.05 seconds to 100 hours, enabling delay-on, delayed off, interval, and pulse timing modes in a single device. The unit accepts multiple control voltages: 24 V AC/DC or 100–127 V AC at 50/60 Hz, with spring-type terminal connections for secure wiring. Typical applications include motor control sequences (such as star-delta timing), interval control, and other automation tasks requiring coordinated output timing within compact control panels.
