The Siemens 3RG7202-3CC42 is a SIMATIC PXO630 K80 thru-beam sensor receiver — the paired end of a photoelectric eye that gives you a 50 m sensing range. It runs on DC 10…36 V, switches PNP antivalent (complementary outputs), and can sink 200 mA per channel. The M12 4-pole connector keeps wiring quick, and IP67 means it survives washdowns on a packaging line or conveyor.
The 50 m range is the maximum distance between emitter and receiver in clean air. The PNP antivalent output gives both a normally-open and normally-closed signal on separate pins.