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| Article number | 6ES7331-7KF02-0AB0 | 6ES7331-7HF01-0AB0 | 6ES7331-1KF02-0AB0 | 6ES7331-7KB02-0AB0 |
| SM331, 8AI, 9/12/14Bit | SM331, 8AI, 14BIT, 0,052MS/channel | SM331, 8AI, 13bit | SM331, 2AI, 9/12/14Bit | |
| Supply voltage | ||||
| Load voltage L+ | ||||
|
● Rated value (DC)
|
24 V | 24 V | 24 V | |
|
● Reverse polarity protection
|
Yes | Yes | Yes | |
| Input current | ||||
| from load voltage L+ (without load), max. | 30 mA | 50 mA | 30 mA | |
| from backplane bus 5 V DC, max. | 50 mA | 100 mA | 90 mA | 50 mA |
| Power loss | ||||
| Power loss, typ. | 1 W | 1.5 W | 0.4 W | 1 W |
| Analog inputs | ||||
| Number of analog inputs | 8 | 8 | 8 | 2 |
|
● For resistance measurement
|
4 | 8 | 1 | |
| permissible input voltage for voltage input (destruction limit), max. | 20 V; continuous; 75 V for max. 1 s (mark to space ratio 1:20) | 20 V; 20 V DC permanent, 75 V DC for max. 1 s (duty factor 1:20) | 30 V; 12 V continuous, 30 V for max. 1 s | 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 | 40 mA | 40 mA | 40 mA |
| Constant measurement current for resistance-type transmitter, typ. | 1.67 mA | 1.67 mA | ||
| Input ranges | ||||
|
● Voltage
|
Yes | Yes | Yes | Yes |
|
● Current
|
Yes | Yes | Yes | Yes |
|
● Thermocouple
|
Yes | No | No | Yes |
|
● Resistance thermometer
|
Yes | No | Yes | Yes |
|
● Resistance
|
Yes | No | Yes | Yes |
| Input ranges (rated values), voltages | ||||
|
● 0 to +10 V
|
No | No | Yes | No |
|
— Input resistance (0 to 10 V)
|
100 kΩ | |||
|
● 1 V to 5 V
|
Yes | Yes | Yes | Yes |
|
— Input resistance (1 V to 5 V)
|
100 kΩ | 100 kΩ | 100 kΩ | 100 kΩ |
|
● 1 V to 10 V
|
No | No | No | |
|
● -1 V to +1 V
|
Yes | Yes | Yes | Yes |
|
— Input resistance (-1 V to +1 V)
|
10 MΩ | 10 MΩ | 100 kΩ | 10 MΩ |
|
● -10 V to +10 V
|
Yes | Yes | Yes | Yes |
|
— Input resistance (-10 V to +10 V)
|
100 kΩ | 100 kΩ | 100 kΩ | 100 kΩ |
|
● -2.5 V to +2.5 V
|
Yes | No | Yes | |
|
— Input resistance (-2.5 V to +2.5 V)
|
100 kΩ | 100 kΩ | ||
|
● -250 mV to +250 mV
|
Yes | No | Yes | |
|
— Input resistance (-250 mV to +250 mV)
|
10 MΩ | 10 MΩ | ||
|
● -5 V to +5 V
|
Yes | Yes | Yes | Yes |
|
— Input resistance (-5 V to +5 V)
|
100 kΩ | 100 kΩ | 100 kΩ | 100 kΩ |
|
● -50 mV to +50 mV
|
No | Yes | No | |
|
— Input resistance (-50 mV to +50 mV)
|
100 kΩ | |||
|
● -500 mV to +500 mV
|
Yes | Yes | Yes | Yes |
|
— Input resistance (-500 mV to +500 mV)
|
10 MΩ | 100 kΩ | 10 MΩ | |
|
● -80 mV to +80 mV
|
Yes | Yes | No | Yes |
|
— Input resistance (-80 mV to +80 mV)
|
10 MΩ | 10 MΩ |
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