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SIEMENS S7-400 6ES74221BH110AA0 SIMATIC S7-400, SM 422,DIGITAL OUTPUT MODULE,,OPTIC. ISOLATED, 16 DO,,24V DC, 2ASIMATIC S7-400, DIGITALAUSGABE,SM 422, POTENTIALGETRENNT,16 DA; DC 24V, 2ASIMATIC S7-400, SORTIES TOR,SM 422, AV. SEPAR.GALVAN.,16 S TOR; 24V C