| | SIMATIC S7-300, ANALOG INPUT SM 331, GALVANICALLY ISOLATED, 8 AI, 14 BIT, 0.052MS/CHANNEL, CURRENT, VOLTAGE, INTERRUPTS, DIAGNOSTICS,20 PIN, FIT FOR ISOCHRONE MODE |
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| Input current |
| from backplane bus 5 V DC, max. | 100 mA |
| Power losses |
| Power loss, typ. | 1.5 W |
| Analog inputs |
| Number of analog inputs | 8 |
| permissible input voltage for voltage input (destruction limit), max. | 20 V |
| permissible input current for current input (destruction limit), max. | 40 mA |
| Input ranges |
| Voltage | Yes |
| Current | Yes |
| Input ranges (rated values), voltages |
| 1 to 5 V | Yes |
| Input resistance (1 to 5 V) | 100 kΩ |
| 1 to 10 V | Yes |
| Input resistance (1 to 10 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 |
| 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 |
| Cable length |
| Cable length, shielded, max. | 200 m |
| Analog value creation |
| Measurement principle | Actual value encryption |
| Integrations and conversion time/ resolution per channel |
| Resolution with overrange (bit including sign), max. | 14 bit |
| Integration time, parameterizable | Yes |
| Basic conversion time, ms | 52 µs per channel |
| Interference voltage suppression for interference frequency f1 in Hz | none / 400 / 60 / 50 Hz |
| Encoder |
| Connection of signal encoders |
| for current measurement as 2-wire transducer | Yes |
| for current measurement as 4-wire transducer | Yes |
| Errors/accuracies |
| Operational limit in overall temperature range |
| Voltage, relative to input area | +/- 0,4 % |
| Current, relative to input area | +/- 0,3 % |
| Basic error limit (operational limit at 25 °C) |
| Voltage, relative to input area | +/- 0,25 % |
| Current, relative to input area | +/- 0,2 % |
| Isochronous mode |
| Isochronous operation (application synchronized up to terminal) | Yes |
| Interrupts/diagnostics/status information |
| Alarms |
| Diagnostic alarm | Yes |
| Limit value alarm | Yes |
| Diagnostic messages |
| Diagnostic information readable | Yes |
| Diagnostics | Yes |
| Diagnostics indication LED |
| Group error SF (red) | Yes |
| 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 | 20-pin |
| Dimensions |
| Width | 40 mm |
| Height | 125 mm |
| Depth | 120 mm |
| Weight |
| Weight, approx. | 230 g |
| Status | Mar 12, 2012 |
