| | SIMATIC DP, HART ANALOG INPUT SM 331, 8 AI, 0/4 - 20MA HART, FOR ET200M WITH IM153-2, 20 PIN |
| |
| Supply voltage |
| Load voltage L+ |
| Rated value (DC) | 24 V |
| Reverse polarity protection | Yes |
| Input current |
| from load voltage L+ (without load), max. | 20 mA |
| from backplane bus 5 V DC, max. | 120 mA |
| Power losses |
| Power loss, typ. | 1.5 W |
| Analog inputs |
| Number of analog inputs | 8 |
| Number of analog inputs for resistance measurement | 0 |
| permissible input current for current input (destruction limit), max. | 40 mA |
| Input ranges |
| Current | Yes |
| Input ranges (rated values), currents |
| 0 to 20 mA | Yes |
| Input resistance (0 to 20 mA) | 125 Ω |
| -20 to +20 mA | Yes |
| Input resistance (-20 to +20 mA) | 125 Ω |
| 4 to 20 mA | Yes |
| Input resistance (4 to 20 mA) | 125 Ω |
| Cable length |
| Cable length, shielded, max. | 800 m |
| Analog value creation |
| Measurement principle | Sigma Delta |
| Integrations and conversion time/ resolution per channel |
| Resolution with overrange (bit including sign), max. | 16 bit |
| Integration time, parameterizable | Yes |
| Integration time, ms | 20 ms at 50 Hz; 16.6 ms at 60 Hz; 100 ms at 100 Hz |
| Interference voltage suppression for interference frequency f1 in Hz | 60 / 50 / 10 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 |
| Current, relative to input area | +/- 0,15 % |
| Basic error limit (operational limit at 25 °C) |
| Current, relative to input area | +/- 0,1 % |
| Isochronous mode |
| Isochronous operation (application synchronized up to terminal) | No |
| Interrupts/diagnostics/status information |
| Alarms |
| Diagnostic alarm | Yes |
| Limit value alarm | Yes |
| Diagnostic messages |
| Diagnostic functions | Yes |
| Diagnostic information readable | Yes |
| Diagnostics | Yes |
| Group error | Yes |
| Diagnostics indication LED |
| Group error SF (red) | Yes |
| Galvanic isolation |
| Galvanic isolation analog inputs |
| between the channels | No |
| between the channels, in groups of | 8 |
| between the channels and the backplane bus | Yes |
| Isolation |
| Isolation checked with | 500 |
| Connection method |
| required front connector | 20-pin |
| Dimensions |
| Width | 40 mm |
| Height | 125 mm |
| Depth | 117 mm |
| Weight |
| Weight, approx. | 205 g |
| Status | Mar 12, 2012 |
