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| Article number | 6ES7331-7PF01-0AB0 | 6ES7331-7PF11-0AB0 | 6ES7331-7PE10-0AB0 | 6ES7331-7NF00-0AB0 | 6ES7331-7NF10-0AB0 |
| SM331, 8AI, resistor, PT100/200/1000, . | SM331, 8AI, 16BIT, Thermocouples | SM331, 6AI, 16bit, Thermocouple | SM331,8AI,+/-5/10V,1-5V,+/-20mA,0/4-20mA | SM331,8AI,+/-5/10V,1-5V,+/-20mA,0/4-20mA | |
| Supply voltage | |||||
| Load voltage L+ | |||||
|
● Rated value (DC)
|
24 V | 24 V | 24 V | 24 V | |
|
● Reverse polarity protection
|
Yes | Yes | Yes | Yes | |
| Input current | |||||
| from load voltage L+ (without load), max. | 240 mA | 240 mA | 150 mA | 200 mA | |
| from backplane bus 5 V DC, max. | 100 mA | 100 mA | 100 mA | 130 mA | 100 mA |
| Power loss | |||||
| Power loss, typ. | 4.6 W | 3 W | 2.2 W | 0.6 W | 3 W |
| Analog inputs | |||||
| Number of analog inputs | 8 | 8 | 6 | 8 | 8 |
|
● For resistance measurement
|
8 | ||||
| permissible input voltage for voltage input (destruction limit), max. | 75 V; 35 V continuous, 75 V for max. 1 s (mark to space ratio 1:20) | 75 V; 20 V DC permanent, 75 V DC for max. 1 s (duty factor 1:20) | 35 V; 35 V continuous, 75 V for max. 1 s (mark to space ratio 1:20) | 50 V; Permanent | 75 V; 35 V continuous, 75 V for max. 1 s (mark to space ratio 1:20) |
| permissible input current for current input (destruction limit), max. | 32 mA | 40 mA | |||
| Constant measurement current for resistance-type transmitter, typ. | 0.7 mA | 0.7 mA | |||
| Input ranges | |||||
|
● Voltage
|
No | No | Yes | Yes | Yes |
|
● Current
|
No | No | No | Yes | Yes |
|
● Thermocouple
|
No | Yes | Yes | No | No |
|
● Resistance thermometer
|
Yes | No | No | No | No |
|
● Resistance
|
Yes | No | No | No | No |
| Input ranges (rated values), voltages | |||||
|
● 0 to +10 V
|
No | No | No | No | No |
|
● 1 V to 5 V
|
No | No | No | Yes | Yes |
|
— Input resistance (1 V to 5 V)
|
2 MΩ | 10 MΩ | |||
|
● 1 V to 10 V
|
No | No | No | No | No |
|
● -1 V to +1 V
|
No | No | Yes | No | No |
|
— Input resistance (-1 V to +1 V)
|
10 MΩ | ||||
|
● -10 V to +10 V
|
No | No | No | Yes | Yes |
|
— Input resistance (-10 V to +10 V)
|
2 MΩ | 10 MΩ | |||
|
● -2.5 V to +2.5 V
|
No | No | No | No | No |
|
● -250 mV to +250 mV
|
No | No | Yes | No | No |
|
— Input resistance (-250 mV to +250 mV)
|
10 MΩ | ||||
|
● -5 V to +5 V
|
No | No | No | Yes | Yes |
|
— Input resistance (-5 V to +5 V)
|
2 MΩ | 10 MΩ | |||
|
● -50 mV to +50 mV
|
No | No | Yes | No | No |
|
— Input resistance (-50 mV to +50 mV)
|
10 MΩ | ||||
|
● -500 mV to +500 mV
|
No | No | Yes | No | No |
|
— Input resistance (-500 mV to +500 mV)
|
10 MΩ | ||||
|
● -80 mV to +80 mV
|
No | No | Yes | No | No |
|
— Input resistance (-80 mV to +80 mV)
|
10 MΩ | ||||
| Input ranges (rated values), currents | |||||
|
● 0 to 20 mA
|
No | No | No | Yes | Yes |
|
— Input resistance (0 to 20 mA)
|
250 Ω | 250 Ω | |||
|
● -10 mA to +10 mA
|
No | No | No | No | No |
|
● -20 mA to +20 mA
|
No | No | No | Yes | Yes |
|
— Input resistance (-20 mA to +20 mA)
|
250 Ω | 250 Ω | |||
|
● -3.2 mA to +3.2 mA
|
No | No | No | No | No |
|
● 4 mA to 20 mA
|
No | No | No | Yes | Yes |
|
— Input resistance (4 mA to 20 mA)
|
250 Ω | 250 Ω |
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