Supply voltage Load voltage L1 rating (AC) 230 V permissible range, lower limit (AC) 79 V permissible range, upper limit (AC) 264 V Input current from load voltage L + (without load), max 2 mA from load voltage L1 ( no load), max 3 mA Digital output Digital output number 16 off the output of the lighting load capacity, maximum 50 W output current for signal "1" rated 1 A range of 0-40 allows for signal "1" ℃, the maximum value of 1 A for signal "1" minimum load current 10 mA for signal "1" permissible surge current, max 20 A; maximum of 10 Hz inductive load with two half-wave switching frequency with resistive load the maximum value of 0.5 Hz lighting load, max 1 Hz output of the total current (per group) horizontal installation up to 40 ℃, max 4 A up to 60 ℃, max 2 A maximum vertical mounting position up to 40 ℃, the maximum length of 2 A conductor shielded cable length, maximum 1000 m unshielded wire length, maximum 600 m alarms / diagnostics / status information Alarms Diagnostic alarm diagnose whether diagnostic information is broken No No fuse is short-circuited load No lack of diagnostic LED display voltage Rated load voltage PWR (green) No Insurance OK FSG (green) is; potential for red LED digital output potential insurance isolated isolation between channels, 8 channels and the backplane bus between the grouping points is; optocoupler Insulation Insulation test, using DC 4,000 V connectivity needs 20-pin front plug Dimensions Width 40 mm Height 125 mm Depth 120 mm Weight Weight about 275 g Date 2014-2-8 SIMATIC S7-300, Digital output SM 322, optical isolation, 16 DO, 120/230V AC, 1 A, 20-pin