Siemens SIMATIC - Page 321

Analog modules
6.4 Analog input module SM 331; AI 8 x 16 Bit; (6ES7331-7NF10-0AB0)
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
321
Technical specifications
Voltages, currents, electrical potentials
Rated electronics supply voltage L + 24 V DC
• Reverse polarity protection
yes
Electrical isolation
• between channels and the backplane bus
• between channels and electronics power supply
• between channels
in groups of
yes
yes
yes
2
Isolation test voltage
500 V AC
Current consumption
• from the backplane bus
• from supply voltage L+
max. 100 mA
max. 200 mA
Power loss of the module
typ. 3.0 W
Generation of analog values
Measuring principle
Integrating
Integration/conversion time/resolution (per channel)
• programmable
• Basic conversion time in ms (8-channel mode)
• Basic conversion time in ms (4-channel mode)
• Resolution, including sign
• Interference frequency suppression at frequency f1 in Hz
yes
95/83/72/23
10
1) 4)
16 bits
All
2)
/50/60/400
Measured value smoothing
None / low/ average/ high
Basic execution time of the module, in ms (8-channel-mode)
190/166/144//46
Basic execution time of the module, in ms (4-channel-mode)
10
1)
Interference frequency suppression, error limits
Interference frequency suppression at F = n x (f1 1%)(f1 = interference frequency, n = 1, 2, ...)
• Common mode interference (VCM < AC 60 V)
• Series mode interference (peak value of disturbance < rated
input range)
> 100 dB
> 90 dB
3)
Crosstalk between inputs
> 100 dB
Operational limit (across entire temperature range, relative to the measurement range end value in the selected input
range)
• Input voltage
• Input current
±0.1%
±0.1%
Basic error limit (operational limit at 25 °C, relative to the measurement range end value in the selected input range)
• Voltage input
• Current input
±0.05%
±0.05%
Temperature error (relative to input range)
± 0.005%/K
Linearity error (relative to input range)
±0.01%
Repeat accuracy (in settled state at 25 °C, relative to measurement
range end value in the input range)
±0.01%