SIMATIC S7-400, DIGITALEINGABESM 421, POTENTIALGETRENNT16 DE; DC 24V MIT0,05 MS-EINGANGSVERZOEGERUNGALARM, DIAGNOSESIMATIC S7-400, DIGITAL INPUTSM 421, GALVANICALLY ISOLATED,16 DI, 24V DC WITH0.05 MS INPUT DELAY,ALARM, DIAGNOSTICS