| SIMATIC S7-300, Analog input SM 331, Isolated 8 AI, resolution 13 bits U/I/resistor/Pt100, NI100, NI1000, LG-NI1000, PTC/KTY, 66 ms conversion time; 1x 40-pole |
Input current |
from backplane bus 5 V DC, max. | 90 mA |
Power loss |
Power loss, typ. | 0.4 W |
Analog inputs |
Number of analog inputs | 8 |
● For resistance measurement | 8 |
permissible input voltage for voltage input (destruction limit), max. | 30 V; 12 V continuous, 30 V for max. 1 s |
permissible input current for current input (destruction limit), max. | 40 mA |
Input ranges |
● Voltage | Yes |
● Current | Yes |
● Thermocouple | No |
● Resistance thermometer | Yes |
● Resistance | Yes |
Input ranges (rated values), voltages |
● 0 to +10 V | Yes |
— Input resistance (0 to 10 V) | 100 kΩ |
● 1 V to 5 V | Yes |
— Input resistance (1 V to 5 V) | 100 kΩ |
● 1 V to 10 V | No |
● -1 V to +1 V | Yes |
— Input resistance (-1 V to +1 V) | 100 kΩ |
● -10 V to +10 V | Yes |
— Input resistance (-10 V to +10 V) | 100 kΩ |
● -2.5 V to +2.5 V | No |
● -250 mV to +250 mV | No |
● -5 V to +5 V | Yes |
— Input resistance (-5 V to +5 V) | 100 kΩ |
● -50 mV to +50 mV | Yes |
— Input resistance (-50 mV to +50 mV) | 100 kΩ |
● -500 mV to +500 mV | Yes |
— Input resistance (-500 mV to +500 mV) | 100 kΩ |
● -80 mV to +80 mV | No |
Input ranges (rated values), currents |
● 0 to 20 mA | Yes |
— Input resistance (0 to 20 mA) | 100 Ω |
● -10 mA to +10 mA | No |
● -20 mA to +20 mA | Yes |
— Input resistance (-20 mA to +20 mA) | 100 Ω |
● -3.2 mA to +3.2 mA | No |
● 4 mA to 20 mA | Yes |
— Input resistance (4 mA to 20 mA) | 100 Ω |
Input ranges (rated values), thermocouples |
● Type B | No |
● Type C | No |
● Type E | No |
● Type J | No |
● Type K | No |
● Type L | No |
● Type N | No |
● Type R | No |
● Type S | No |
● Type T | No |
● Type U | No |
● Type TXK/TXK(L) to GOST | No |
Input ranges (rated values), resistance thermometer |
● Cu 10 | No |
● Ni 100 | Yes; Standard/climate |
— Input resistance (Ni 100) | 100 MΩ |
● Ni 1000 | Yes |
— Input resistance (Ni 1000) | 100 MΩ |
● LG-Ni 1000 | Yes; Standard/climate |
— Input resistance (LG-Ni 1000) | 100 MΩ |
● Ni 120 | No |
● Ni 200 | No |
● Ni 500 | No |
● Pt 100 | Yes; Standard/climate |
— Input resistance (Pt 100) | 100 MΩ |
● Pt 1000 | No |
● Pt 200 | No |
● Pt 500 | No |
Input ranges (rated values), resistors |
● 0 to 150 ohms | No |
● 0 to 300 ohms | No |
● 0 to 600 ohms | Yes |
— Input resistance (0 to 600 ohms) | 100 MΩ |
● 0 to 6000 ohms | Yes |
— Input resistance (0 to 6000 ohms) | 100 MΩ |
Thermocouple (TC) |
Temperature compensation |
— parameterizable | No |
— internal temperature compensation | No |
— external temperature compensation with compensations socket | No |
Characteristic linearization |
● parameterizable | Yes |
Cable length |
● shielded, max. | 200 m; max. 50 m at 50 mV |
Analog value generation for the inputs |
Integration and conversion time/resolution per channel |
● Resolution with overrange (bit including sign), max. | 13 bit |
● Integration time, parameterizable | Yes; 60 / 50 ms |
● Basic conversion time (ms) | 66 / 55 ms |
● Interference voltage suppression for interference frequency f1 in Hz | 50 / 60 Hz |
Encoder |
Connection of signal encoders |
● for voltage measurement | Yes |
● for current measurement as 2-wire transducer | Yes; with external supply |
● for current measurement as 4-wire transducer | Yes |
● for resistance measurement with two-wire connection | Yes |
● for resistance measurement with three-wire connection | Yes |
● for resistance measurement with four-wire connection | Yes |
Errors/accuracies |
Operational error limit in overall temperature range |
● Voltage, relative to input range, (+/-) | 0.6 %; ±0.6 % (±5 V, 10 V, 1 to 5 V, 0 to 10 V); ±0.5 % (±50 mV, 500 mV, 1 V) |
● Current, relative to input range, (+/-) | 0.5 %; ±20 mA, 0 to 20 mA, 4 to 20 mA |
● Resistance, relative to input range, (+/-) | 0.5 %; 0 to 6 kohms, 0 to 600 kohms |
● Resistance thermometer, relative to input range, (+/-) | 1 Kelvin (Pt100, Ni100, climatic; Ni1000, LG-Ni1000, standard; Ni1000, LG-Ni1000, climatic); 1.2 Kelvin (Pt100, Ni100, standard) |
Basic error limit (operational limit at 25 °C) |
● Voltage, relative to input range, (+/-) | 0.4 %; 0.4% (±5 V, 10 V, 1 to 5 V, 0 to 10 V); 0.3% (±50 mV, 500 mV, 1 V) |
● Current, relative to input range, (+/-) | 0.3 %; ±20 mA, 0 to 20 mA, 4 to 20 mA |
● Resistance, relative to input range, (+/-) | 0.3 %; 0 to 6 kohms, 0 to 600 kohms |
● Resistance thermometer, relative to input range, (+/-) | 1 Kelvin (Pt100, Ni100, standard); 0.8 Kelvin (Pt100, Ni100, climatic; Ni1000, LG-Ni1000, standard; Ni1000, LG-Ni1000, climatic) |
Interrupts/diagnostics/status information |
Diagnostics function | No |
Alarms |
● Diagnostic alarm | No |
● Limit value alarm | No |
Diagnostic messages |
● Diagnostic information readable | No |
Diagnostics indication LED |
● Group error SF (red) | No |
Potential separation |
Potential separation analog inputs |
● between the channels | No |
● between the channels and backplane bus | Yes |
Isolation |
Isolation tested with | 500 V DC |
Connection method |
required front connector | 40-pin |
Dimensions |
Width | 40 mm |
Height | 125 mm |
Depth | 117 mm |
Weights |
Weight, approx. | 250 g |
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