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SIMATIC S7-300, ANALOG INPUT SM 331, OPTICALLY ISOLATED, 8 AI, 13 BIT RESOLUTION, U/I/RESISTANCE, PT100, 66 MS MODULE UPDATE, 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 |
| permissible input current for current input (destruction limit), max. |
40 mA; Protection available against destruction |
| Input ranges |
| ● Voltage |
Yes |
| ● Current |
Yes |
| ● 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 V to +1 V |
Yes |
| ● Input resistance (-1 V to +1 V) |
10 MΩ |
| ● -10 V to +10 V |
Yes |
| ● Input resistance (-10 V to +10 V) |
100 kΩ |
| ● -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) |
10 MΩ |
| ● -500 mV to +500 mV |
Yes |
| ● Input resistance (-500 mV to +500 mV) |
10 MΩ |
| Input ranges (rated values), currents |
| ● 0 to 20 mA |
Yes |
| ● Input resistance (0 to 20 mA) |
50 Ω |
| ● -20 to +20 mA |
Yes |
| ● Input resistance (-20 to +20 mA) |
50 Ω |
| ● 4 to 20 mA |
Yes |
| ● Input resistance (4 to 20 mA) |
50 Ω |
| Input ranges (rated values), resistance thermometer |
| ● Pt 100 |
Yes; Standard/climate |
| ● Input resistance (Pt 100) |
10 MΩ |
| Input ranges (rated values), resistors |
| ● 0 to 600 ohms |
Yes |
| ● Input resistance (0 to 600 ohms) |
10 MΩ |
| ● 0 to 6000 ohms |
Yes |
| ● Input resistance (0 to 6000 ohms) |
10 MΩ |
| Thermocouple (TC) |
| Temperature compensation |
| — Parameterizable |
No |
| Characteristic linearization |
| ● Parameterizable |
|
| — for resistance thermometer |
Pt100 (standard/climate) |
| Cable length |
| ● Cable length, shielded, max. |
200 m; 50 m at 50 mV |
| Analog value creation |
| Integration and conversion time/resolution per channel |
| ● Resolution with overrange (bit including sign), max. |
13 bit; Unipolar: 13/13 bits; bipolar: 12 bits + sign/12 bits + sign |
| ● Integration time, ms |
16,67 / 20 ms |
| ● Interference voltage suppression for interference frequency f1 in Hz |
60 / 50 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; with 3-wire compensation |
| ● for resistance measurement with four-wire connection |
Yes |
| Errors/accuracies |
| Operational limit in overall temperature range |
| ● Voltage, relative to input area, (+/-) |
0.6 % |
| ● Current, relative to input area, (+/-) |
0.6 % |
| ● Resistance thermometer, relative to input area, (+/-) |
0.6 %; +/-1,2 K |
| Basic error limit (operational limit at 25 °C) |
| ● Voltage, relative to input area, (+/-) |
0.4 % |
| ● Current, relative to input area, (+/-) |
0.4 % |
| ● Resistance thermometer, relative to input area, (+/-) |
0.4 %; +/- 1 K |
| Interrupts/diagnostics/status information |
| Alarms |
| ● Diagnostic alarm |
No |
| ● Limit value alarm |
No |
| Diagnostic messages |
| ● Diagnostics |
No |
| Galvanic isolation |
| Galvanic isolation analog inputs |
| ● between the channels and the backplane bus |
Yes |
| Isolation |
| Isolation checked with |
600 V DC |
| Connection method |
| required front connector |
40-pin |
| Dimensions |
| Width |
40 mm |
| Height |
125 mm |
| Depth |
120 mm |
| Weights |
| Weight, approx. |
250 g |
| last modified: |
14.10.2014 |
