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SIMATIC S7-300, ANALOG INPUT SM 331, OPTICALLY ISOLATED, 8 AE; +/-5/10V, 1-5 V, +/-20MA, 0/4 TO 20MA, 16 BIT, 1 COMMON POINT(60 V COM.), 4 CHANNEL MODE: 10 MS, 8 CHANNEL MODE: 23-95 MS, 1 X 40 PIN |
| Supply voltage |
| Load voltage L+ |
| ● Rated value (DC) |
24 V |
| ● Reverse polarity protection |
Yes |
| Input current |
| from load voltage L+ (without load), max. |
200 mA |
| from backplane bus 5 V DC, max. |
100 mA |
| Power losses |
| Power loss, typ. |
3 W |
| Analog inputs |
| Number of analog inputs |
8 |
| permissible input voltage for voltage input (destruction limit), max. |
75 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. |
40 mA |
| Input ranges |
| ● Voltage |
Yes |
| ● Current |
Yes |
| ● Thermocouple |
No |
| ● Resistance thermometer |
No |
| ● Resistance |
No |
| Input ranges (rated values), voltages |
| ● 0 to +10 V |
No |
| ● 1 to 5 V |
Yes |
| ● Input resistance (1 to 5 V) |
10 MΩ |
| ● 1 to 10 V |
No |
| ● -1 V to +1 V |
No |
| ● -10 V to +10 V |
Yes |
| ● Input resistance (-10 V to +10 V) |
10 MΩ |
| ● -2.5 V to +2.5 V |
No |
| ● -250 mV to +250 mV |
No |
| ● -5 V to +5 V |
Yes |
| ● Input resistance (-5 V to +5 V) |
10 MΩ |
| ● -50 mV to +50 mV |
No |
| ● -500 mV to +500 mV |
No |
| ● -80 mV to +80 mV |
No |
| Input ranges (rated values), currents |
| ● 0 to 20 mA |
Yes |
| ● Input resistance (0 to 20 mA) |
250 Ω |
| ● -10 to +10 mA |
No |
| ● -20 to +20 mA |
Yes |
| ● Input resistance (-20 to +20 mA) |
250 Ω |
| ● -3.2 to +3.2 mA |
No |
| ● 4 to 20 mA |
Yes |
| ● Input resistance (4 to 20 mA) |
250 Ω |
| Input ranges (rated values), thermoelements |
| ● Type B |
No |
| ● Type E |
No |
| ● Type J |
No |
| ● Type K |
No |
| ● Type L |
No |
| ● Type N |
No |
| ● Type R |
No |
| ● Type S |
No |
| ● Type T |
No |
| ● Type U |
No |
| ● Type TXK/TXK(L) to GOST |
No |
| Input ranges (rated values), resistance thermometer |
| ● Cu 10 |
No |
| ● Ni 100 |
No |
| ● Ni 1000 |
No |
| ● LG-Ni 1000 |
No |
| ● Ni 120 |
No |
| ● Ni 200 |
No |
| ● Ni 500 |
No |
| ● Pt 100 |
No |
| ● Pt 1000 |
No |
| ● Pt 200 |
No |
| ● Pt 500 |
No |
| Input ranges (rated values), resistors |
| ● 0 to 150 ohms |
No |
| ● 0 to 300 ohms |
No |
| ● 0 to 600 ohms |
No |
| ● 0 to 6000 ohms |
No |
| Cable length |
| ● Cable length, shielded, max. |
200 m |
| Analog value creation |
| Measurement principle |
integrating |
| Integration and conversion time/resolution per channel |
| ● Resolution with overrange (bit including sign), max. |
16 bit; Unipolar: 15/15/15/15 bits; bipolar: 15 bits + sign/15 bits + sign/15 bits + sign/15 bits + sign |
| ● Integration time, parameterizable |
Yes; 23 / 72 / 83 / 95 ms |
| ● Basic conversion time, ms |
10 ms (4-channel mode); 95/83/72/23 ms (8-channel mode) |
| ● Interference voltage suppression for interference frequency f1 in Hz |
400 / 60 / 50 Hz, combinations of 400, 60, 50 Hz |
| Encoder |
| Connection of signal encoders |
| ● for current measurement as 2-wire transducer |
Yes; with external transmitter, current supply; possible with separate supply for transmitter |
| ● for current measurement as 4-wire transducer |
Yes |
| Errors/accuracies |
| Operational limit in overall temperature range |
| ● Voltage, relative to input area, (+/-) |
0.1 % |
| ● Current, relative to input area, (+/-) |
0.1 % |
| Basic error limit (operational limit at 25 °C) |
| ● Voltage, relative to input area, (+/-) |
0.05 % |
| ● Current, relative to input area, (+/-) |
0.05 % |
| Isochronous mode |
| Isochronous operation (application synchronized up to terminal) |
No |
| Interrupts/diagnostics/status information |
| Alarms |
| ● Diagnostic alarm |
Yes; Parameterizable |
| ● Limit value alarm |
Yes; Parameterizable all channels (end of cycle interrupt is also supported across modules) |
| Diagnostic messages |
| ● Diagnostic functions |
Yes; Parameterizable |
| ● Diagnostic information readable |
Yes |
| ● Diagnostics |
Yes |
| Diagnostics indication LED |
| ● Group error SF (red) |
Yes |
| Galvanic isolation |
| Galvanic isolation analog inputs |
| ● between the channels |
No |
| ● between the channels, in groups of |
2 |
| ● between the channels and the backplane bus |
Yes |
| Isolation |
| Isolation checked with |
500 V AC |
| Connection method |
| required front connector |
40-pin |
| Dimensions |
| Width |
40 mm |
| Height |
125 mm |
| Depth |
120 mm |
| Weights |
| Weight, approx. |
272 g |
| last modified: |
25.09.2014 |
