The XUSL4E3BB081LWH is a Type 4 safety light curtain from the XUSL series, configured as a receiver and transmitter pair in one box. Three beams spaced across an 810 mm protective height give it a 0–17 m operating range, which means it covers a full body-height access zone — think conveyor in-feed or robot cell perimeter — with a single pair. The IP69K rating on the body means it survives high-temperature, high-pressure washdown cycles, so it belongs on food, beverage, or pharmaceutical lines where sanitation protocols are aggressive.
Three beams at 810 mm protective height — that is a 270 mm beam spacing, which under IEC 61496-1 qualifies as finger-protection class (14 mm resolution is not the spec here; this is a body-detection curtain, not a finger-detection one).