What this XUSL4E4BB091LWH is and what it guards
The Telemecanique XUSL4E4BB091LWH is a Type 4 safety light curtain — four beams spaced across a 910 mm protective height, with a 17 m operating range. Type 4 means it meets the highest safety integrity level per IEC 61496-1/2, so it's rated for guarding access to hazardous machinery where a failure could cause serious injury. The 4-beam body-detection pattern is designed to catch a person reaching into the danger zone, not just a hand or finger. It runs on 24 VDC and ships as a matched receiver and transmitter pair.
IP69K — what that means on a washdown line
IP69K is the high-pressure, high-temperature washdown rating. This light curtain withstands 80 °C water at 100 bar from a nozzle held close — the kind of cleaning you see in food-and-beverage, dairy, or pharmaceutical lines. The housing and optics seals are built for that. Operating temperature is -30 °C to 55 °C, so it handles freezer environments and hot washdown cycles without condensation issues inside the tube.