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SIMATIC S7-400, SM 431 ANALOG INPUT MODULE OPTIC. ISOLATED, 16 AI, 16 BIT RESOLUTION, U/I/RESIST./ THERMOEL./PT100,ALARM,DIAGNOST. |
| 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 |
| from backplane bus 5 V DC, max. |
700 mA |
| Power losses |
| Power loss, typ. |
4.5 W |
| Hardware configuration |
| Slots |
| ● Required slots |
1 |
| Analog inputs |
| Number of analog inputs |
16 |
| Number of analog inputs for voltage/current measurement |
16 |
| Number of analog inputs for resistance measurement |
8 |
| permissible input voltage for voltage input (destruction limit), max. |
18 V; 18 V continuous, 75 V for 1 ms (mark to space ratio 1:20) |
| permissible input current for current input (destruction limit), max. |
40 mA |
| Input ranges |
| ● Voltage |
Yes |
| ● Current |
Yes |
| ● Thermocouple |
Yes |
| ● Resistance thermometer |
Yes |
| ● Resistance |
Yes |
| Input ranges (rated values), voltages |
| ● 1 to 5 V |
Yes |
| ● Input resistance (1 to 5 V) |
1 MΩ |
| ● -1 V to 1 V |
Yes |
| ● Input resistance (-1 V to 1 V) |
1 MΩ |
| ● -10 V to 10 V |
Yes |
| ● Input resistance (-10 V to 10 V) |
1 MΩ |
| ● -2.5 V to 2.5 V |
Yes |
| ● Input resistance (-2.5 V to 2.5 V) |
1 MΩ |
| ● -25 mV to 25 mV |
Yes |
| ● Input resistance (-25 mV to 25 mV) |
1 MΩ |
| ● -250 mV to 250 mV |
Yes |
| ● Input resistance (-250 mV to 250 mV) |
1 MΩ |
| ● -5 V to 5 V |
Yes |
| ● Input resistance (-5 V to 5 V) |
1 MΩ |
| ● -50 mV to 50 mV |
Yes |
| ● Input resistance (-50 mV to 50 mV) |
1 MΩ |
| ● -500 mV to 500 mV |
Yes |
| ● Input resistance (-500 mV to 500 mV) |
1 MΩ |
| ● -80 mV to 80 mV |
Yes |
| ● Input resistance (-80 mV to 80 mV) |
1 MΩ |
| Input ranges (rated values), currents |
| ● 0 to 20 mA |
Yes |
| ● Input resistance (0 to 20 mA) |
50 Ω |
| ● -10 to 10 mA |
Yes |
| ● Input resistance (-10 to 10 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 |
| ● -5 to 5 mA |
Yes |
| ● Input resistance (-5 to 5 mA) |
50 Ω |
| Input ranges (rated values), thermoelements |
| ● 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 |
| Input ranges (rated values), resistance thermometer |
| ● Ni 100 |
Yes |
| ● Input resistance (Ni 100) |
1 MΩ |
| ● Ni 1000 |
Yes |
| ● Input resistance (Ni 1000) |
1 MΩ |
| ● Pt 100 |
Yes |
| ● Input resistance (Pt 100) |
1 MΩ |
| ● Pt 1000 |
Yes |
| ● Input resistance (Pt 1000) |
1 MΩ |
| ● Pt 200 |
Yes |
| ● Input resistance (Pt 200) |
1 MΩ |
| ● Pt 500 |
Yes |
| ● Input resistance (Pt 500) |
1 MΩ |
| Input ranges (rated values), resistors |
| ● 0 to 150 ohms |
Yes |
| ● Input resistance (0 to 150 ohms) |
1 MΩ |
| ● 0 to 300 ohms |
Yes |
| ● Input resistance (0 to 300 ohms) |
1 MΩ |
| ● 0 to 48 ohms |
Yes |
| ● Input resistance (0 to 48 ohms) |
1 MΩ |
| ● 0 to 600 ohms |
Yes |
| ● Input resistance (0 to 600 ohms) |
1 MΩ |
| ● 0 to 6000 ohms |
Yes; Usable up to 5000 Ohm |
| ● Input resistance (0 to 6000 ohms) |
1 MΩ |
| Thermocouple (TC) |
| Temperature compensation |
| — external temperature compensation with compensations socket |
Yes |
| — external temperature compensation with Pt100 |
Yes |
| — dynamic reference temperature value |
Yes |
| Characteristic linearization |
| ● Parameterizable |
Yes |
| — for thermocouples |
Type B, E, J, K, L, N, R, S, T, U |
| — for resistance thermometer |
Pt100, Pt200, Pt500, Pt1000, Ni100, Ni1000 |
| Cable length |
| ● Cable length, shielded, max. |
200 m; 50 m with thermocouples and input ranges <= 80 mV |
| Analog value creation |
| Integration and conversion time/resolution per channel |
| ● Resolution with overrange (bit including sign), max. |
16 bit; 16 / 16 / 16 |
| ● Integration time, parameterizable |
Yes |
| ● Basic conversion time, ms |
6 / 20,1 / 23,5 ms |
| ● Integration time, ms |
2,5 / 16,7 / 20 ms |
| ● Basic conversion time, including integration time, ms |
|
| — additional conversion time for wire break monitoring |
4.3 / 4.3 / 4.3 ms |
| — additional conversion time for resistance measurement |
12 / 40,2 / 47 ms |
| — additional conversion time for wire break monitoring and resistance measurement |
5,5 ms |
| ● Interference voltage suppression for interference frequency f1 in Hz |
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 |
| ● for resistance measurement with two-wire connection |
Yes; Line resistances are also measured |
| ● for resistance measurement with three-wire connection |
Yes |
| ● for resistance measurement with four-wire connection |
Yes |
| Errors/accuracies |
| Operational limit in overall temperature range |
| ● Voltage, relative to input area, ( /-) |
0.3 %; /-0.3% at /-250 mV, /-500 mV, /-1 V, /-2.5 V, /-5 V, 1 to 5 V, /- 10 V; /-0.31% at /-80 mV; /-0.32% at /-50 mV; /-0.35% at /-25 mV; |
| ● Current, relative to input area, ( /-) |
0.3 %; at 0 to 20 mA, /-5 mA, /-10 mA, /- 20 mA, 4 to 20 mA |
| ● Resistance, relative to input area, ( /-) |
0.3 %; /-0.3% at 0 to 48 Ohm (4-conductor measurement), 0 to 150 Ohm (4-conductor measurement), 0 to 300 Ohm (4-conductor measurement), 0 to 600 Ohm (4-conductor measurement), 0 to 5000 Ohm (4-conductor measurement, in range of 6000 Ohm); /-0.4% at 0 to 300 Ohm (3-conductor measurement), 0 to 600 Ohm (3-conductor measurement), 0 to 5000 Ohm (3-conductor measurement, in range of 6000 Ohm); |
| ● Resistance thermometer, relative to input area, ( /-) |
0.4 % |
| Basic error limit (operational limit at 25 °C) |
| ● Voltage, relative to input area, ( /-) |
0.15 %; /-0.15% at /-250 mV, /-500 mV, /-1 V, /-2.5 V, /-5 V, 1 to 5 V, /-10 V; /-0.17% at /-80 mV; /-0.19% at /-50 mV; /-0.23% at /-25 mV; |
| ● Current, relative to input area, ( /-) |
0.15 %; at 0 to 20 mA, /-5 mA, /-10 mA, /- 20 mA, 4 to 20 mA |
| ● Resistance, relative to input area, ( /-) |
0.15 %; /-0.15% at 0 to 48 ohms (4-conductor measurement), 0 to 150 ohms (4-conductor measurement), 0 to 300 ohms (4-conductor measurement), 0 to 5000 ohms (4-conductor measurement, in range of 6000 ohms); /-0.3% at 0 to 300 ohms (3-conductor measurement), 0 to 600 ohms (3-conductor measurement), 0 to 5000 ohms (3-conductor measurement, in range of 6000 ohms) |
| ● Resistance thermometer, relative to input area, ( /-) |
0.3 % |
| Interrupts/diagnostics/status information |
| Alarms |
| ● Diagnostic alarm |
Yes; Parameterizable |
| ● Limit value alarm |
Yes; Parameterizable |
| Diagnostic messages |
| ● Diagnostics |
Yes; Parameterizable |
| Galvanic isolation |
| Galvanic isolation analog inputs |
| ● Galvanic isolation analog inputs |
Yes; internal/external |
| ● between the channels |
No |
| Permissible potential difference |
| between the inputs (UCM) |
120 V AC |
| Isolation |
| Isolation checked with |
2120 V DC between bus and L /M; 2120 V DC between bus and analog part; 500 V DC between bus and local ground; 707 V DC between analog part and L /M; 2120 V DC between analog part and local ground; 2120 V DC between L /M and local ground |
| Dimensions |
| Width |
25 mm |
| Height |
290 mm |
| Depth |
210 mm |
| Weights |
| Weight, approx. |
500 g |
| last modified: |
25.09.2014 |
