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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