| Article number | 6ES7331-7RD00-0AB0 | 6ES7331-7SF00-0AB0 |
| SIMATIC S7, SM 331 ANALOG INPUT | SIMATIC S7, SM 331 ANALOG INPUT |
| Supply voltage |
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| Load voltage L+ |
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● Rated value (DC) | 24 V | 24 V |
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● Reverse polarity protection | Yes |
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| Input current |
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| from load voltage L+ (without load), max. | 250 mA |
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| from backplane bus 5 V DC, max. | 60 mA | 120 mA |
| Output voltage |
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| Power supply to the transmitters |
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● Rated value (DC) | 13 V; at 22 mA |
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| Power loss |
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| Power loss, typ. | 3 W | 0.6 W |
| Analog inputs |
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| Number of analog inputs | 4 | 8; 8x thermocouples; 4x RTD thermoresistors |
| permissible input current for current input (destruction limit), max. | 40 mA |
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| Input ranges |
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● Voltage | No | Yes |
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● Current | Yes | No |
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● Thermocouple | No | Yes |
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● Resistance thermometer | No | Yes |
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● Resistance | No | Yes |
| Input ranges (rated values), voltages |
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● -1 V to +1 V |
| Yes |
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— Input resistance (-1 V to +1 V) |
| 10 MΩ |
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● -25 mV to +25 mV |
| Yes |
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— Input resistance (-25 mV to +25 mV) |
| 10 MΩ |
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● -250 mV to +250 mV |
| Yes |
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— Input resistance (-250 mV to +250 mV) |
| 10 MΩ |
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● -50 mV to +50 mV |
| Yes |
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— Input resistance (-50 mV to +50 mV) |
| 10 MΩ |
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● -500 mV to +500 mV |
| Yes |
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— Input resistance (-500 mV to +500 mV) |
| 10 MΩ |
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● -80 mV to +80 mV |
| Yes |
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— Input resistance (-80 mV to +80 mV) |
| 10 MΩ |
| Input ranges (rated values), currents |
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● 0 to 20 mA | Yes |
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— Input resistance (0 to 20 mA) | 50 Ω |
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● 4 mA to 20 mA | Yes |
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— Input resistance (4 mA to 20 mA) | 50 Ω |
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| Input ranges (rated values), thermocouples |
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● Type B |
| Yes |
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— Input resistance (Type B) |
| 10 MΩ |
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● Type E |
| Yes |
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— Input resistance (Type E) |
| 10 MΩ |
|
● Type J |
| Yes |
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— Input resistance (type J) |
| 10 MΩ |
|
● Type K |
| Yes |
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— Input resistance (Type K) |
| 10 MΩ |
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● Type L |
| Yes |
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— Input resistance (Type L) |
| 10 MΩ |
|
● Type N |
| Yes |
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— Input resistance (Type N) |
| 10 MΩ |
|
● Type R |
| Yes |
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— Input resistance (Type R) |
| 10 MΩ |
|
● Type S |
| Yes |
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— Input resistance (Type S) |
| 10 MΩ |
|
● Type T |
| Yes |
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— Input resistance (Type T) |
| 10 MΩ |
|
● Type U |
| Yes |
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— Input resistance (Type U) |
| 10 MΩ |
| Input ranges (rated values), resistance thermometer |
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● Ni 100 |
| Yes |
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— Input resistance (Ni 100) |
| 10 MΩ |
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● Pt 100 |
| Yes |
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— Input resistance (Pt 100) |
| 10 MΩ |
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● Pt 200 |
| Yes |
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— Input resistance (Pt 200) |
| 10 MΩ |
| Cable length |
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● shielded, max. | 200 m | 200 m; TC: 50 m |
| Analog value generation for the inputs |
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| Integration and conversion time/resolution per channel |
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● Resolution with overrange (bit including sign), max. | 16 bit; 10 bit to 15 bit + sign | 16 bit; 10 bit to 15 bit + sign |
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● Integration time, parameterizable | Yes; 2.5 to 100 ms | Yes; 2.5 to 100 ms |
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● Interference voltage suppression for interference frequency f1 in Hz | 10 to 400 Hz | 10 to 400 Hz |
