| Article number |
6ES7331-7HF01-0AB0
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SIMATIC S7-300, Analog input SM 331, isolated, 8 AI, resolution 14 bit, 0.052 ms/channel current, Voltage alarm, diagnostics, 1x 20-pole, suitable for isochronous mode Improved bus cycle time for isochronous mode |
| Supply voltage |
| Load voltage L+ |
| ● Rated value (DC) |
24 V |
| ● Reverse polarity protection |
Yes |
| Input current |
| from load voltage L+ (without load), max. |
50 mA |
| from backplane bus 5 V DC, max. |
100 mA |
| Power loss |
| Power loss, typ. |
1.5 W |
| Analog inputs |
| Number of analog inputs |
8 |
| permissible input voltage for voltage input (destruction limit), max. |
20 V; 20 V DC permanent, 75 V DC for max. 1 s (duty factor 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 V to 5 V |
Yes |
| — Input resistance (1 V to 5 V) |
100 kΩ |
| ● -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 |
| ● -5 V to +5 V |
Yes |
| — Input resistance (-5 V to +5 V) |
100 kΩ |
| ● -500 mV to +500 mV |
Yes |
| ● -80 mV to +80 mV |
Yes |
| Input ranges (rated values), currents |
| ● 0 to 20 mA |
Yes |
| — Input resistance (0 to 20 mA) |
50 Ω |
| ● -20 mA to +20 mA |
Yes |
| — Input resistance (-20 mA 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 |
| Integration and conversion time/resolution per channel |
| ● Resolution with overrange (bit including sign), max. |
14 bit; Unipolar: 14 bit; bipolar: 13 bit + sign |
| ● Integration time, parameterizable |
Yes |
| ● Basic conversion time (ms) |
52 µs per channel |
| ● Interference voltage suppression for interference frequency f1 in Hz |
none / 400 / 60 / 50 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 |
| ● Voltage, relative to input range, (+/-) |
0.4 % |
| ● Current, relative to input range, (+/-) |
0.3 % |
| Basic error limit (operational limit at 25 °C) |
| ● Voltage, relative to input range, (+/-) |
0.25 % |
| ● Current, relative to input range, (+/-) |
0.2 % |
| Interrupts/diagnostics/status information |
| Diagnostics function |
Yes |
| Alarms |
| ● Diagnostic alarm |
Yes; Parameterizable |
| ● Limit value alarm |
Yes; Parameterizable, channels 0 and 2 |
| Diagnoses |
| ● Diagnostic information readable |
Yes |
| Diagnostics indication LED |
| ● Group error SF (red) |
Yes |
| Potential separation |
| Potential separation analog inputs |
| ● between the channels |
No |
| ● between the channels and backplane bus |
Yes |
| ● between the channels and the power supply of the electronics |
Yes |
| Isolation |
| Isolation tested with |
500 V DC |
| connection method |
| required front connector |
20-pin |
| Dimensions |
| Width |
40 mm |
| Height |
125 mm |
| Depth |
117 mm |
| Weights |
| Weight, approx. |
230 g |