The Siemens 3RT1916-2CH31 is a SIRIUS timing relay that gives you an adjustable ON-delay from 5 to 100 seconds. It runs on a 90 to 240 V supply, working on both AC (50/60 Hz) and DC, so you can wire it into most control circuits without worrying about the flavor of voltage on the panel. It clips onto the DIN rail — standard 45 mm wide housing — and fits any mounting position. The IP20 terminal protection is what you expect for inside a cabinet; this isn't a washdown part, it's meant to live behind a gland plate where the grease stays on the bearings, not on the relay.
The adjustable time range of 5 … 100 s covers a lot of common sequencing needs — staggering motor starts, delaying a conveyor restart after an E-stop, or holding off a coolant pump until the spindle is up to speed. The 50 ms recovery time means if you cycle power, the relay is ready to retime again in a blink, so fast cycling won't skip a beat. The supply range of 90 … 240 V AC/DC is wide enough that you don't need a separate control transformer for most 120 V or 230 V control circuits. Just land the wires and set the pot. The basic insulation and pollution degree 3 rating tell you it's built for a standard industrial cabinet, not a clean room. Rated for installation up to 2,000 m altitude. Storage range is -40 to +85 °C.
The relay carries basic insulation per IEC 61812-1 and meets the EMC immunity standard EN 61000-6-2, which is the industrial environment level. That means it's tested to live next to contactors, drives, and welders without false-triggering. Pollution degree 3 handles conductive dust and humidity typical in a factory floor panel.