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SIMATIC S7-400, ANALOG INPUT SM 431, 8AI; 16 BIT RESOLUTION, U/I/THERMOEL., OPTIC. ISOLATED W. 1 POINT PER COMMON, DIAGN., ALARM, 20 MS MODULE UPDATE |
| Input current |
| from load voltage L (without load), max. |
400 mA |
| from backplane bus 5 V DC, max. |
1 200 mA |
| Power loss |
| Power loss, typ. |
4.6 W |
| Hardware configuration |
| Slots |
| ● required slots |
1 |
| Analog inputs |
| Number of analog inputs |
8 |
| Number of analog inputs for voltage/current measurement |
8 |
| permissible input voltage for voltage input (destruction limit), max. |
35 V; 35 V continuous, 75 V for max. 1 s (mark to space ratio 1:20) |
| permissible input current for current input (destruction limit), max. |
32 mA |
| Input ranges |
| ● Voltage |
Yes |
| ● Current |
Yes |
| ● Thermocouple |
Yes |
| ● Resistance thermometer |
No |
| ● Resistance |
No |
| Input ranges (rated values), voltages |
| ● 1 to 5 V |
Yes |
| ● Input resistance (1 to 5 V) |
> 2000 ohms |
| ● -1 V to 1 V |
Yes |
| ● -10 V to 10 V |
Yes |
| ● -100 mV to 100 mV |
Yes |
| ● -2.5 V to 2.5 V |
Yes |
| ● -20 mV to 20 mV |
Yes |
| ● -250 mV to 250 mV |
Yes |
| ● -5 V to 5 V |
Yes |
| ● -50 mV to 50 mV |
Yes |
| ● -500 mV to 500 mV |
Yes |
| ● -80 mV to 80 mV |
Yes |
| Input ranges (rated values), currents |
| ● 0 to 20 mA |
Yes |
| ● -10 to 10 mA |
Yes |
| ● -20 to 20 mA |
Yes |
| ● -3.2 to 3.2 mA |
Yes |
| ● 4 to 20 mA |
Yes |
| ● Input resistance (4 to 20 mA) |
50 Ω |
| ● -5 to 5 mA |
Yes |
| Input ranges (rated values), thermocouples |
| ● Type B |
Yes |
| ● Type E |
Yes |
| ● Type J |
Yes |
| ● Type K |
Yes |
| ● Type L |
Yes |
| ● Type N |
Yes |
| ● Type R |
Yes |
| ● Type S |
Yes |
| ● Type T |
Yes |
| ● Type U |
Yes |
| Thermocouple (TC) |
| Temperature compensation |
| — internal temperature compensation |
Yes |
| — external temperature compensation with compensations socket |
Yes |
| — dynamic reference temperature value |
Yes |
| Characteristic linearization |
| ● parameterizable |
Yes |
| — for thermocouples |
Type B, E, J, K, L, N, R, S, T, U |
| 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. |
16 bit |
| ● Integration time, parameterizable |
Yes |
| ● Basic conversion time, ms |
10 / 16,7 / 20 / 100 |
| ● Integration time, ms |
2,5 / 16,7 / 20 / 100 |
| ● Basic conversion time, including integration time, ms |
|
| — additional conversion time for wire-break monitoring and resistance measurement |
1 ms (module) |
| ● Interference voltage suppression for interference frequency f1 in Hz |
400 / 60 / 50 / 10 Hz |
| Encoder |
| Connection of signal encoders |
| ● for current measurement as 4-wire transducer |
Yes |
| ● for resistance measurement with four-wire connection |
Yes |
| Errors/accuracies |
| Operational error limit in overall temperature range |
| ● Voltage, relative to input area, ( /-) |
0.3 % |
| ● Current, relative to input area, ( /-) |
0.5 % |
| Basic error limit (operational limit at 25 °C) |
| ● Voltage, relative to input area, ( /-) |
0.1 % |
| ● Current, relative to input area, ( /-) |
0.17 % |
| Interrupts/diagnostics/status information |
| Alarms |
| ● Diagnostic alarm |
Yes; Parameterizable |
| ● Limit value alarm |
Yes |
| Diagnostic messages |
| ● Diagnostics |
Yes |
| Galvanic isolation |
| Galvanic isolation analog inputs |
| ● Galvanic isolation analog inputs |
Yes; internal/external |
| ● between the channels |
Yes |
| Permissible potential difference |
| between the inputs (UCM) |
120 V AC |
| Isolation |
| Isolation tested with |
1500 V DC |
| Dimensions |
| Width |
25 mm |
| Height |
290 mm |
| Depth |
210 mm |
| Weights |
| Weight, approx. |
650 g |
| last modified: |
21.08.2014 |
