Siemens 6AG1221-1BH32-4XB0 Industrial Automation Module. The recorded exact-product description states: SIPLUS S7-1200 SM 1221 16DI, based on 6ES7221-1BH32-0XB0 with conformal coating, -20…+60 °C, 16 DI, 24 V DC, sink/source.
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