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SIMATIC S7, ANALOG INPUT SM 331, OPTICALLY ISOLATATED, 8 AI THERMOCOUPLE/4 AI PT100, F. SIGNALS F. HAZARDOUS AREAS, CAPABLE OF DIAGNOST.,PTB-TESTED 1 X 20 PIN |
| Supply voltage |
| Load voltage L+ |
| ● Rated value (DC) |
24 V |
| Input current |
| from backplane bus 5 V DC, max. |
120 mA |
| Power loss |
| Power loss, typ. |
0.6 W |
| Analog inputs |
| Number of analog inputs |
8; 8x thermocouples; 4x RTD thermoresistors |
| Input ranges |
| ● Thermocouple |
Yes |
| ● Resistance thermometer |
Yes |
| Input ranges (rated values), thermocouples |
| ● Type B |
Yes |
| ● Input resistance (Type B) |
10 MΩ |
| ● Type E |
Yes |
| ● Input resistance (Type E) |
10 MΩ |
| ● Type J |
Yes |
| ● Input resistance (type J) |
10 MΩ |
| ● Type K |
Yes |
| ● Input resistance (Type K) |
10 MΩ |
| ● Type L |
Yes |
| ● Input resistance (Type L) |
10 MΩ |
| ● Type N |
Yes |
| ● Input resistance (Type N) |
10 MΩ |
| ● Type R |
Yes |
| ● Input resistance (Type R) |
10 MΩ |
| ● Type S |
Yes |
| ● Input resistance (Type S) |
10 MΩ |
| ● Type T |
Yes |
| ● Input resistance (Type T) |
10 MΩ |
| ● Type U |
Yes |
| ● Input resistance (Type U) |
10 MΩ |
| Input ranges (rated values), resistance thermometers |
| ● Ni 100 |
Yes |
| ● Input resistance (Ni 100) |
10 MΩ |
| ● Pt 100 |
Yes |
| ● Input resistance (Pt 100) |
10 MΩ |
| ● Pt 200 |
Yes |
| ● Input resistance (Pt 200) |
10 MΩ |
| Cable length |
| ● Cable length, shielded, max. |
200 m; TC: 50 m |
| Analog value generation |
| Measurement principle |
Sigma Delta |
| Integration and conversion time/resolution per channel |
| ● Resolution with overrange (bit including sign), max. |
16 bit; 10 to 15 bits + sign |
| ● Integration time, parameterizable |
Yes; 2.5 to 100 ms |
| ● Interference voltage suppression for interference frequency f1 in Hz |
10 to 400 Hz |
| Encoder |
| Connection of signal encoders |
| ● for current measurement as 2-wire transducer |
Yes |
| ● for current measurement as 4-wire transducer |
Yes |
| Errors/accuracies |
| Temperature error (relative to input range), (+/-) |
Temperature error: 0.001 to 0.002 %/K |
| Operational error limit in overall temperature range |
| ● Resistance thermometer, relative to input area, (+/-) |
0.09 to 0.04% |
| Basic error limit (operational limit at 25 °C) |
| ● Resistance thermometer, relative to input area, (+/-) |
0.1 % |
| Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency |
| ● Series mode interference (peak value of interference < rated value of input range), min. |
60 dB |
| ● Common mode interference, min. |
130 dB |
| Interrupts/diagnostics/status information |
| Diagnostic messages |
| ● Diagnostic functions |
Yes |
| ● Diagnostic information readable |
Yes |
| ● Overrange |
Yes |
| ● Wire-break in signal transmitter cable |
Yes |
| ● Short-circuit of the signal encoder cable |
Yes |
| Diagnostics indication LED |
| ● Short-circuit per channel (red) |
Yes |
| ● Short-circuit group error (red) |
Yes |
| Ex(i) characteristics |
| Module for Ex(i) protection |
Yes |
| Maximum values of input circuits (per channel) |
| ● Co (permissible external capacity), max. |
43 µF |
| ● Io (short-circuit current), max. |
28.8 mA |
| ● Lo (permissible external inductivity), max. |
40 mH |
| ● Po (power of load), max. |
41.4 mW |
| ● Uo (output no-load voltage), max. |
5.9 V |
| Galvanic isolation |
| Galvanic isolation analog inputs |
| ● Galvanic isolation analog inputs |
Yes |
| Permissible potential difference |
| between the inputs (UCM) |
60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area |
| between inputs and MANA (UCM) |
60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area |
| Standards, approvals, certificates |
| Use in hazardous areas |
| ● Type of protection acc. to EN 50020 (CENELEC) |
[EEx ib] IIC |
| ● Type of protection acc. to FM |
Class I, Division 2, Group A, B, C, D T4 |
| ● Test number PTB |
Ex-96.D.2108X |
| Ambient conditions |
| Operating temperature |
| ● max. |
60 °C |
| Connection method |
| required front connector |
20-pin |
| Weights |
| Weight, approx. |
210 g |
| last modified: |
21.08.2014 |
