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| Article number | 6ES7431-0HH00-0AB0 | 6ES7431-1KF20-0AB0 | 6ES7431-1KF00-0AB0 | 6ES7431-1KF10-0AB0 |
| Article number | SIMATIC S7-400, ANALOG INPUT | SIMATIC S7-400, SM 431 | SIMATIC S7-400, SM 431 | SIMATIC S7-400, SM 431 |
| Supply voltage | ||||
| Load voltage L+ | ||||
|
● 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 | ||||
| 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 | ||||
| Power loss, typ. | 2 W | 4.9 W | 1.8 W | 3.5 W |
| Analog inputs | ||||
| 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 | ||||
|
● 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 | ||||
|
● 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
|
Yes | |||
|
— Input resistance (-2.5 V to +2.5 V)
|
1 MΩ | |||
|
● -250 mV to +250 mV
|
Yes | |||
|
— Input resistance (-250 mV to +250 mV)
|
1 MΩ | |||
|
● -5 V to +5 V
|
Yes | |||
|
— Input resistance (-5 V to +5 V)
|
1 MΩ | |||
|
● -500 mV to +500 mV
|
Yes | |||
|
— Input resistance (-500 mV to +500 mV)
|
1 MΩ | |||
|
● -80 mV to +80 mV
|
Yes | |||
|
— Input resistance (-80 mV to +80 mV)
|
1 MΩ |
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