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SIMATIC S7-300, ANALOG INPUT SM 331, OPTICALLY ISOLATED, 8AI, RESOLUTION 9/12/14 BITS, U/I/THERMOCOUPLE/RESISTANCE INTERRUPT, DIAGNOSTICS; 1X20PIN REMOVE/INSERT W. BACKPLANE BUS |
| 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. |
50 mA |
| Power losses |
| Power loss, typ. |
1 W |
| Analog inputs |
| Number of analog inputs |
8 |
| Number of analog inputs for resistance measurement |
4 |
| permissible input voltage for voltage input (destruction limit), max. |
20 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 |
Yes |
| ● Resistance thermometer |
Yes |
| ● Resistance |
Yes |
| Input ranges (rated values), voltages |
| ● 0 to +10 V |
No |
| ● 1 to 5 V |
Yes |
| ● Input resistance (1 to 5 V) |
100 kΩ |
| ● 1 to 10 V |
No |
| ● -1 V to +1 V |
Yes |
| ● Input resistance (-1 V to +1 V) |
10 MΩ |
| ● -10 V to +10 V |
Yes |
| ● Input resistance (-10 V to +10 V) |
100 kΩ |
| ● -2.5 V to +2.5 V |
Yes |
| ● Input resistance (-2.5 V to +2.5 V) |
100 kΩ |
| ● -250 mV to +250 mV |
Yes |
| ● Input resistance (-250 mV to +250 mV) |
10 MΩ |
| ● -5 V to +5 V |
Yes |
| ● Input resistance (-5 V to +5 V) |
100 kΩ |
| ● -50 mV to +50 mV |
No |
| ● -500 mV to +500 mV |
Yes |
| ● Input resistance (-500 mV to +500 mV) |
10 MΩ |
| ● -80 mV to +80 mV |
Yes |
| ● Input resistance (-80 mV to +80 mV) |
10 MΩ |
| Input ranges (rated values), currents |
| ● 0 to 20 mA |
Yes |
| ● Input resistance (0 to 20 mA) |
25 Ω |
| ● -10 to +10 mA |
Yes |
| ● Input resistance (-10 to +10 mA) |
25 Ω |
| ● -20 to +20 mA |
Yes |
| ● Input resistance (-20 to +20 mA) |
25 Ω |
| ● -3.2 to +3.2 mA |
Yes |
| ● Input resistance (-3.2 to +3.2 mA) |
25 Ω |
| ● 4 to 20 mA |
Yes |
| ● Input resistance (4 to 20 mA) |
25 Ω |
| Input ranges (rated values), thermoelements |
| ● Type B |
No |
| ● 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 |
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 |
Yes; Standard |
| ● Input resistance (Ni 100) |
10 MΩ |
| ● Ni 1000 |
No |
| ● LG-Ni 1000 |
No |
| ● Ni 120 |
No |
| ● Ni 200 |
No |
| ● Ni 500 |
No |
| ● Pt 100 |
Yes; Standard |
| ● Input resistance (Pt 100) |
10 MΩ |
| ● Pt 1000 |
No |
| ● Pt 200 |
No |
| ● Pt 500 |
No |
| Input ranges (rated values), resistors |
| ● 0 to 150 ohms |
Yes |
| ● Input resistance (0 to 150 ohms) |
10 MΩ |
| ● 0 to 300 ohms |
Yes |
| ● Input resistance (0 to 300 ohms) |
10 MΩ |
| ● 0 to 600 ohms |
Yes |
| ● Input resistance (0 to 600 ohms) |
10 MΩ |
| ● 0 to 6000 ohms |
No |
| Thermocouple (TC) |
| Temperature compensation |
| — Parameterizable |
Yes |
| — internal temperature compensation |
Yes |
| — external temperature compensation with compensations socket |
Yes |
| Characteristic linearization |
| ● Parameterizable |
Yes |
| — for thermocouples |
Type E, J, K, L, N |
| — for resistance thermometer |
Pt100 (standard, climatic range), Ni100 (standard, climatic range) |
| Cable length |
| ● Cable length, shielded, max. |
200 m; 50 m at 80 mV and thermocouples |
| Analog value creation |
| Measurement principle |
integrating |
| Integration and conversion time/resolution per channel |
| ● Resolution with overrange (bit including sign), max. |
15 bit; Unipolar: 9/12/12/14 bits; bipolar: 9 bits + sign/12 bits + sign/12 bits + sign/14 bits + sign |
| ● Integration time, parameterizable |
Yes; 2,5 / 16,67 / 20 / 100 ms |
| ● Basic conversion time, ms |
3 / 17 / 22 /102 ms |
| ● Interference voltage suppression for interference frequency f1 in Hz |
400 / 60 / 50 / 10 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 |
| ● 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, (+/-) |
1 %; +/-1% (80 mV); +/-0.6% (250 to 1000 mV); +/-0.8% (2.5 to 10 V) |
| ● Current, relative to input area, (+/-) |
0.7 %; From 3.2 to 20 mA |
| ● Resistance, relative to input area, (+/-) |
0.7 %; 150, 300, 600 Ohm |
| ● Resistance thermometer, relative to input area, (+/-) |
0.7 %; +/-0.7% (Pt100/ Ni100); +/-0.8% (Pt100 climate) |
| Basic error limit (operational limit at 25 °C) |
| ● Voltage, relative to input area, (+/-) |
0.6 %; +/-0.4% (250 to 1000 mV); +/-0.6 % (2.5 to 10 mV); +/-0.7 % (80 mV) |
| ● Current, relative to input area, (+/-) |
0.5 %; 3.2 to 20 mA |
| ● Resistance, relative to input area, (+/-) |
0.5 %; 150, 300, 600 Ohm |
| ● Resistance thermometer, relative to input area, (+/-) |
0.6 %; +/-0.5% (Pt100/ Ni100); +/-0.6% (Pt100 climate) |
| Isochronous mode |
| Isochronous operation (application synchronized up to terminal) |
No |
| Interrupts/diagnostics/status information |
| Alarms |
| ● Diagnostic alarm |
Yes; Parameterizable, channels 0 and 2 |
| ● Limit value alarm |
Yes; Parameterizable |
| 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 and the backplane bus |
Yes |
| Isolation |
| Isolation checked with |
500 V DC |
| Connection method |
| required front connector |
20-pin |
| Dimensions |
| Width |
40 mm |
| Height |
125 mm |
| Depth |
120 mm |
| Weights |
| Weight, approx. |
250 g |
| last modified: |
13.10.2014 |
