The 3RG7642-3CC00 is a SIMATIC PXO230 M18S thru-beam sensor receiver — the receiving half of a photoelectric pair. Straight optics, M18×65 cylindrical housing, 10-30V DC supply, PNP antivalent output rated 150 mA. Terminated with a 4-pole M12 connector; 6m cable length. IP67 rated.
The PNP antivalent output gives both normally-open and normally-closed signals on separate pins — useful for feeding a PLC input that expects complementary signals or for fail-safe logic without an external inverter. The 150 mA output sink is enough for direct drive of a small relay or indicator, but not for a contactor coil. M12 4-pole connector is standard; the 6m cable gives flexibility in mounting distance from the controller cabinet. IP67 means it handles washdown environments — food, beverage, or outdoor installs — as long as the mating connector is also rated.