Ultrasonic sensors UNDK 20 (Sd = 1000 mm) Ultrasonic proximity sensors sample drawing 20 15 LED M8 x 1 14 42 6,5 3,2 29,5 9,5 Teach- in 5,7 11,8 general data sample picture scanning range sd 100 ... 1000 mm scanning range far limit Sde 100 ... 1000 mm hysteresis typ. 4 % Sde repeat accuracy < 0,5 mm temperature drift < 0,18 % Sde/K response time ton < 50 ms release time toff < 50 ms sonic frequency 240 kHz adjustment Teach-in alignment aid target indication flashing output indicator LED green electrical data voltage supply range +Vs 12 ... 30 VDC current consumption max. (no load) 35 mA output current < 200 mA voltage drop Vd < 2 VDC residual ripple < 10 % Vs short circuit protection yes reverse polarity protection yes mechanical data type rectangular housing material polyester width / diameter 20 mm height / length 42 mm depth 15 mm connection types connector M8 ambient conditions operating temperature -10 ... +60 °C protection class IP 67 1 www.baumer.com 2/6/2015 Ultrasonic sensors UNDK 20 (Sd = 1000 mm) Ultrasonic proximity sensors order reference output circuit UNDK 20N6903/S35A NPN make function (NO) UNDK 20N7903/S35A NPN break function (NC) UNDK 20P6903/S35A PNP make function (NO) UNDK 20P7803/S35A PNP break function (NC) 2 www.baumer.com 2/6/2015