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SIMATIC S7-400, ANALOG INPUT SM 431, NON-ISOLATED 16 AI, RESOLUTION 13 BITS, /-10V, /-20MA, 4 - 20MA 20 MS MODULE UPDATE |
| Supply voltage |
| Load voltage L |
| ● Rated value (DC) |
24 V; Only required for supplying 2-wire transmitters |
| ● Reverse polarity protection |
Yes |
| Input current |
| from load voltage L (without load), max. |
400 mA; for 16 connected, fully controlled 2-wire transmitters |
| from backplane bus 5 V DC, max. |
100 mA |
| Power loss |
| Power loss, typ. |
2 W |
| Hardware configuration |
| Slots |
| ● required slots |
1 |
| Analog inputs |
| Number of analog inputs |
16 |
| Number of analog inputs for voltage/current measurement |
16 |
| permissible input voltage for voltage input (destruction limit), max. |
20 V; 20 V DC permanent, 75 V DC for max. 1 s (duty factor 1:20) |
| permissible input current for current input (destruction limit), max. |
40 mA |
| Input ranges |
| ● Voltage |
Yes |
| ● Current |
Yes |
| ● Thermocouple |
No |
| ● Resistance thermometer |
No |
| ● Resistance |
No |
| Input ranges (rated values), voltages |
| ● 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 |
| Input ranges (rated values), currents |
| ● -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 generation |
| Integration and conversion time/resolution per channel |
| ● Resolution with overrange (bit including sign), max. |
13 bit |
| ● Integration time, parameterizable |
Yes |
| ● Basic conversion time, ms |
55 / 65 ms |
| ● Integration time, ms |
50 / 60 ms |
| ● Interference voltage suppression for interference frequency f1 in Hz |
60 / 50 Hz |
| Encoder |
| Connection of signal encoders |
| ● for current measurement as 4-wire transducer |
Yes |
| Errors/accuracies |
| Operational error limit in overall temperature range |
| ● Voltage, relative to input area, ( /-) |
0.65 %; 1.0% at 1 to 5 V; 0.65% at /-1 V, /-10 V |
| ● Current, relative to input area, ( /-) |
0.65 % |
| Basic error limit (operational limit at 25 °C) |
| ● Voltage, relative to input area, ( /-) |
0.25 %; 0.5% at 1 to 5 V; 0.25% at /-1 V, /-10 V |
| ● Current, relative to input area, ( /-) |
0.25 %; at /-20 mA, 4 to 20 mA |
| Galvanic isolation |
| Galvanic isolation analog inputs |
| ● Galvanic isolation analog inputs |
No |
| ● between the channels |
No |
| Permissible potential difference |
| between the inputs (UCM) |
2 V DC / 2 Vpp AC |
| Isolation |
| Isolation tested with |
500 V DC between bus and local ground |
| Dimensions |
| Width |
25 mm |
| Height |
290 mm |
| Depth |
210 mm |
| Weights |
| Weight, approx. |
500 g |
| last modified: |
21.08.2014 |
