Telemecanique Sensors XUSL4M Light Curtain Receiver, Transmitter, 51 Beams, 40mm Resolution, Range: Preventa, SIL (IEC 61508): 3, Protective Height: 1510mm, Maximum Scanning Distance: 4 m, 12 m, Maximum Response Time: 15.5 ms, Supply Voltage: 24 V dc, Application: Hand, Dimensions: 55 x 50 x 1595 mm, Features: 2 PNP Output, Automatic/Manual Restart, Multi-Colour LEDs, MPN: XUSL4MA40H151N