SeriesMSI-SR4BFunctionsAutomatic start/restartContactor monitoring (EDM)Cross circuit monitoringStart/restart interlock (RES), selectableRestartAutomaticManualSIL3, IEC 61508SILCL3, IEC/EN 62061Performance Level (PL)e, EN ISO 13849-1MTTFd73 years, EN ISO 13849-1PFHD2,1E-08 per hourPFHD, nop = 48000.0000000014 per hourPFHD, nop = 288000.0000000045 per hourPFHD, nop = 864000.000000015 per hourMission time20 years, EN ISO 13849-1Category4, EN ISO 13849STOP category0, IEC/EN 60204-1B10d at DC13 (inductive load)1,000,000 number of cyclesB10d at AC15 (inductive load)1,400,000 number of cyclesProtective circuitFuse on switching output, upstreamSwitching frequency, max.3600 switching cycles/hContinuous current per current path, max.3 AInput current, max.100 mAExternal safeguarding for supply circuit200 mA delay-actionPermissible input line resistance, max.30 ΩSupply voltage UB24 V, AC/DC, -20 ... 20 %Current consumption, max.Without external loadPower consumption, max.3 WNumber of safety-related switching outputs (OSSDs)3 Piece(s)TypeSafety-related switching output OSSDVoltage typeAC/DC