SIEMENS 6DD1681-0EB3 Description Description SIEMENS SIMATIC TDC, BINARY INPUT MODULE SB61 GALVANIC ISOLATION24/48V , 8BI 24 OR 48 V DC, LED-DISPLAY Related products SIEMENS 1FK6032-6AK71-1TA0 SIEMENS 1FN3300-4SA00-0AA0 SIEMENS 1FK6042-6AF71-1TH0 SIEMENS 1FN1910-0AA20-3AA0 SIEMENS 1FK7044-7AF71-1EG0 SIEMENS 1FN3050-4SA00-0AA0