The Schneider Electric XUSL4E Type 4 safety light curtain is designed for manual detection of workers near hazardous machinery. The transmitter-receiver system creates 68 light beams with a protection height of 1.60 mm. The PFHD reliability data is 1.67 x 10. It can be used as a stand-alone sensor (e.g. without a safety control unit) or with an appropriate safety control unit. Aluminum casing with integrated LED acting as local signal to clearly indicate device status