The XUSZWPE030 is a Telemecanique protective cover in the Light Curtain Accessories sub-category, UPC 389119619274.
Where it sits in the safety chain
A protective cover in this class mounts over the optical face of a light curtain emitter or receiver column and shields the polycarbonate windows from weld spatter, coolant spray, paint mist and the kind of daily abrasion a guarded cell produces. It is an accessory, not a sensor — the cover does not affect the safety function, but it does extend the interval between window-cleaning stops on a light curtain that is positioned where fouling collects fast.