Supply voltage Load voltage L + rating (DC) 24 V permissible range, lower limit (DC) 20.4 V permissible range, upper limit (DC) 28.8 V Input current from load voltage L + (without load), max 160 mA digital outputs digital outputs 32 Number of inductive shutdown voltage limit L + (-53 V) output of the lighting load breaking capacity, maximum 5 W 48 Ω load resistance range lower limit upper limit 4 kΩ Output voltage for signal "1" minimum L + (-0.8 V ) output current for signal "1" rated 0.5 A for signal "1" permissible range of 0 to 40 ℃, max 100 max 0.6 A for signal "1" minimum load current 5 mA Switching frequency with resistive load The total current (per group) max 0.5 Hz lighting load, max Hz 10 Hz output of the inductive load horizontal installation up to 40 ℃, max 4 A up to 60 ℃, max 3 A vertical installation position up to 40 ℃, the maximum length of 2 A wire shielded wire length, maximum 1000 m unshielded wire length, maximum 600 m alarms / diagnostics / status information Alarms Diagnostic alarm No diagnostic information diagnostic Short No No No load disconnection No lack of diagnostic LED display voltage Rated load voltage PWR (green) No Insurance OK FSG (green) No Galvanic isolation digital outputs Galvanic isolation between channels, grouping 8 points between the channels and the backplane bus is; optocoupler Insulation Insulation testing, using the DC 500 V connection technology requires 40-pin front plug Dimensions Width 40 mm Height 125 mm Depth 120 mm Weight Weight about 260 g Date 2014-2-8 SIMATIC S7-300, DIGITAL OUTPUT SM 322, optical isolation , 32 DO, 24V DC, 0.5A, 40-pin, the output current is the sum of the 4A / group (16A / module)