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SIMATIC S7-300, ANALOG INPUT SM 331, OPTICALLY ISOLATED, 8 AI, 13 BIT RESOLUTION, U/I/RESISTANCE/PT100, NI100, NI1000, LG-NI1000, PTC / KTY, 66 MS MODULE UPDATE, 1 X 40 PIN |
Input current |
from backplane bus 5 V DC, max. |
90 mA |
Power losses |
Power loss, typ. |
0.4 W |
Analog inputs |
Number of analog inputs |
8 |
Number of analog inputs 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 to 5 V |
Yes |
● Input resistance (1 to 5 V) |
100 kΩ |
● 1 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 to +10 mA |
No |
● -20 to +20 mA |
Yes |
● Input resistance (-20 to +20 mA) |
100 Ω |
● -3.2 to +3.2 mA |
No |
● 4 to 20 mA |
Yes |
● Input resistance (4 to 20 mA) |
100 Ω |
Input ranges (rated values), thermoelements |
● Type B |
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 |
— for thermocouples |
No |
— for resistance thermometer |
yes; Pt100 standard/air con.; Ni100 standard/air con.; Ni1000 standard/air con.; LG-Ni1000 standard/air con. |
Cable length |
● Cable length, shielded, max. |
200 m; max. 50 m at 50 mV |
Analog value creation |
Measurement principle |
integrating |
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 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 limit in overall temperature range |
● Voltage, relative to input area, (+/-) |
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 area, (+/-) |
0.5 %; +/-20 mA, 0 to 20 mA, 4 to 20 mA |
● Resistance, relative to input area, (+/-) |
0.5 %; 0 to 6 kohms, 0 to 600 kohms |
● Resistance thermometer, relative to input area, (+/-) |
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 area, (+/-) |
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 area, (+/-) |
0.3 %; +/-20 mA, 0 to 20 mA, 4 to 20 mA |
● Resistance, relative to input area, (+/-) |
0.3 %; 0 to 6 kohms, 0 to 600 kohms |
● Resistance thermometer, relative to input area, (+/-) |
1 Kelvin (Pt100, Ni100, standard); 0.8 Kelvin (Pt100, Ni100, climatic; Ni1000, LG-Ni1000, standard; Ni1000, LG-Ni1000, climatic) |
Isochronous mode |
Isochronous operation (application synchronized up to terminal) |
No |
Interrupts/diagnostics/status information |
Alarms |
● Diagnostic alarm |
No |
● Limit value alarm |
No |
Diagnostic messages |
● Diagnostic functions |
No |
● Diagnostic information readable |
No |
● Diagnostics |
No |
● Group error |
No |
Diagnostics indication LED |
● Group error SF (red) |
No |
Galvanic isolation |
Galvanic isolation analog inputs |
● between the channels |
No |
● between the channels and the backplane bus |
Yes |
Isolation |
Isolation checked 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 |
last modified: |
13.10.2014 |