The Siemens 3RT1916-2CG31 is a SIRIUS timing relay — an ON-delay-only device with an adjustable time range of 5…100 s. The recovery time between cycles is 50 ms, so it can sequence fast-repeat operations without missing a cycle.
The ON-delay-only function means the output contact closes after the set delay once the coil is energized, and drops out immediately when the coil is de-energized — no OFF-delay or star-delta modes. The 5…100 s adjustment covers most conveyor start-delay, pump sequencing, and motor soft-start bypass timing needs. The 24…66 V AC/DC coil range lets it work on common control voltages without a separate power supply. The IP20 terminal protection is standard for enclosed gear; it's not meant for washdown or outdoor exposure.