Article number | 6ES7431-0HH00-0AB0 | 6ES7431-1KF20-0AB0 | 6ES7431-1KF00-0AB0 | 6ES7431-1KF10-0AB0 |
| SIMATIC S7-400, ANALOG INPUT | SIMATIC S7-400, SM 431 | SIMATIC S7-400, SM 431 | SIMATIC S7-400, SM 431 |
Supply voltage |
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Load voltage L+ |
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● Rated value (DC) | 24 V; Only required for supplying 2-wire transmitters | 24 V; Only required for supplying 2-wire transmitters | not necessary | 24 V; Only required for supplying 2-wire transmitters |
● Reverse polarity protection | Yes | Yes |
| Yes |
Input current |
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from load voltage L+ (without load), max. | 400 mA; for 16 connected, fully controlled 2-wire transmitters | 200 mA; for 8 connected, fully controlled 2-wire transmitters |
| 200 mA; for 8 connected, fully controlled 2-wire transmitters |
from backplane bus 5 V DC, max. | 100 mA | 1 000 mA | 350 mA | 600 mA |
Power loss |
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Power loss, typ. | 2 W | 4.9 W | 1.8 W | 3.5 W |
Analog inputs |
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Number of analog inputs | 16 | 8 | 8 | 8 |
● For voltage/current measurement | 16 | 8 | 8 | 8 |
● For resistance measurement |
| 4 | 4 | 4 |
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) | 18 V; 18 V continuous, 75 V for 1 ms (mark to space ratio 1:20) | 50 V | 18 V; 18 V continuous, 75 V for 1 ms (mark to space ratio 1:20) |
permissible input current for current input (destruction limit), max. | 40 mA | 40 mA; Permanent | 50 mA; 40 mA continuous | 40 mA; Permanent |
Constant measurement current for resistance-type transmitter, typ. | 1.67 mA | 1.67 mA | 1.67 mA | 1.67 mA |
Input ranges |
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● Voltage | Yes | Yes | Yes | Yes |
● Current | Yes | Yes | Yes | Yes |
● Thermocouple | No | No | No | Yes |
● Resistance thermometer | No | No | No | Yes |
● Resistance | No | Yes | Yes | Yes |
Input ranges (rated values), voltages |
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● 1 V to 5 V | Yes | Yes | Yes | Yes |
— Input resistance (1 V to 5 V) | 100 kΩ | 10 MΩ | 200 kΩ | 1 MΩ |
● -1 V to +1 V | Yes | Yes | Yes | Yes |
— Input resistance (-1 V to +1 V) | 10 MΩ | 10 MΩ | 200 kΩ | 1 MΩ |
● -10 V to +10 V | Yes | Yes | Yes | Yes |
— Input resistance (-10 V to +10 V) | 100 kΩ | 100 kΩ | 200 kΩ | 1 MΩ |
● -2.5 V to +2.5 V |
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| Yes |
— Input resistance (-2.5 V to +2.5 V) |
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| 1 MΩ |
● -250 mV to +250 mV |
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| Yes |
— Input resistance (-250 mV to +250 mV) |
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| 1 MΩ |
● -5 V to +5 V |
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| Yes |
— Input resistance (-5 V to +5 V) |
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| 1 MΩ |
● -500 mV to +500 mV |
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| Yes |
— Input resistance (-500 mV to +500 mV) |
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| 1 MΩ |
● -80 mV to +80 mV |
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| Yes |
— Input resistance (-80 mV to +80 mV) |
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| 1 MΩ |
