Ultrasonic sensors Ultrasonic retro-reflective sensors URDK 20 (Sde = 1000 mm) 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 0 ... 1000 mm reflector position Sde 200 ... 1000 mm adjusting range reflector (operating range) ± 2,5 % Sde adjusting range reflector (limit range) ± 5 % Sde repeat accuracy < 1,5 mm temperature drift < 2 % Sde 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 Ultrasonic retro-reflective sensors order reference output circuit URDK 20N6903/S35A NPN make function (NO) URDK 20N7903/S35A NPN break function (NC) URDK 20P6903/S35A PNP make function (NO) URDK 20P7903/S35A PNP break function (NC) 2 www.baumer.com URDK 20 (Sde = 1000 mm) 2/6/2015