The ABB 2TLA020070R4800 is a Pluto B22 safety relay from the Pluto family. This is the core safety logic element in a control panel — it monitors e-stops, light curtains, and interlock switches, and drops its output contacts if any input path is broken, fails safe on demand.
As a DIN-rail-mounted safety relay, the Pluto B22 snaps into the panel alongside contactors and terminal blocks. Its compact footprint saves rail space in a crowded enclosure — a detail to note when calculating fill factor on a panel layout.