Siemens 6AF7021-0AA Description Description Siemens DE21 Digital input 24V DC, 16 inputs Related products SIEMENS 1FK7083-5AF71-1EB3 SIEMENS 1FT5072-0AC01-0-Z SIEMENS 1FK7060-5AF71-1FH3 SIEMENS 1FT5066-1AF71-4AA0 SIEMENS 1FK7022-5AK71-1DA0 SIEMENS 1FN3300-4SA00-0AA0
