Light transmitter: Laser diode typical service life 50,000 h at Ta = +40 °C, Light type: red, alternating light, Signal output: 2 PNP outputs, independent, short-circuit proof, reverse polarity protected, Interface type: RS-485, Connection: M12 connector, 8-pin, Operating voltage: 18 ... 30 V DC, Ambient temperature: -10 ... 60 °C (14 ... 140 °F)