What this XUSL4E3BB081NS1 is and what it guards
The XUSL4E3BB081NS1 is a Type 4 safety light curtain from the XUSL series — a receiver-and-transmitter pair that projects three infrared beams across a 0 to 12.0 m range to create a body-detection zone. The 810 mm protective height means it covers a vertical area roughly waist-to-shoulder on a standing operator, making it suitable for guarding the approach to a hazard zone like a press, robot cell, or conveyor infeed. Type 4 per IEC 61496-1/2 means it can detect a hand or body reaching into the field and trigger a stop within the safety-rated response time, so it integrates into a SIL 3 / PL e safety circuit.