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SIEMENS S7-400 6ES74221HH000AA0 SIMATIC S7-400, SM 422,DIGITAL OUTPUT MODULE,,OPTIC. ISOLATED, 16 DO,,5..230V AC, 5A RELAYSIMATIC S7-400, DIGITALAUSGABE,SM 422, POTENTIALGETRENNT,16 DA; AC 5..230V, 5A RELAISSIMATIC S7-400, SORTIES TOR,SM 422, AVEC SEP. GA