6ES7331-7RD00-0AB0 SIMATIC S7, SM 331 ANALOG INPUT
SIMATIC S7, ANALOG INPUT SM 331, OPTICALLY ISOLATATED, 4 AI, 0/4 - 20MA, 1 X 20 PIN, F. SIGNALS F. HAZARDOUS AREAS, CAPABLE OF DIAGNOST.,PTB-TESTED
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| Supply voltage |
| Load voltage L+ |
| ● Rated value (DC) |
24 V |
| ● Reverse polarity protection |
Yes |
| Input current |
| from load voltage L+ (without load), max. |
250 mA |
| from backplane bus 5 V DC, max. |
60 mA |
| Output voltage |
| Power supply to the transmitters |
| ● Rated value (DC) |
13 V; at 22 mA |
| ● No-load voltage (DC) |
25.2 V |
| Power loss |
| Power loss, typ. |
3 W |
| Analog inputs |
| Number of analog inputs |
4 |
| permissible input current for current input (destruction limit), max. |
40 mA |
| Input ranges |
| ● Voltage |
No |
| ● Current |
Yes |
| ● Thermocouple |
No |
| ● Resistance thermometer |
No |
| ● Resistance |
No |
| Input ranges (rated values), currents |
| ● 0 to 20 mA |
Yes |
| ● Input resistance (0 to 20 mA) |
50 Ω |
| ● 4 mA to 20 mA |
Yes |
| ● Input resistance (4 mA to 20 mA) |
50 Ω |
| Cable length |
| ● shielded, max. |
200 m |
| Analog value generation for the inputs |
| Measurement principle |
Sigma Delta |
| Integration and conversion time/resolution per channel |
| ● Resolution with overrange (bit including sign), max. |
16 bit; 10 bit to 15 bit + 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 |
| Operational error limit in overall temperature range |
| ● Current, relative to input area, (+/-) |
0.45 % |
| Basic error limit (operational limit at 25 °C) |
| ● Current, 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
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