
Analog modules
5.23 Analog input module SM 431; AI 16 x 16 Bit (6ES7431-7QH00-0AB0)
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
297
Formation of analog values
Measuring principle Integrating
Integration/conversion time/resolution (per channel) (Does not go into the response time)
Programmable
Yes
Noise suppression f1 in Hz
400 / 60 / 50
Integration time in ms
2,5 / 16,7 / 20
Basic conversion time in ms
6 / 20,1 / 23,5
Additional conversion time for resistance
measurements with 3-conductor connection in ms
12 / 40,2 / 47
Additional conversion time for wire break
monitoring in ms
4,3 / 4,3 / 4,3
Additional conversion time for measuring
resistance in ms
5,5 / 5,5 / 5,5
Resolution (including overshoot range)
16/16/16 bit
Measured value smoothing Parameters can be assigned in 4 stages
Basic execution time of the module, in ms (all
channels enabled)
96 / 322 / 376
Noise suppression, error limits
Noise suppression for f = nx (f1 ±1%), (f1 = interference frequency) n = 1, 2, ...
Common-mode interference (UCM < 120 Vpp)
> 100 dB
Series-mode interference (peak value of
disturbance < nominal input range)
> 40 dB
Crosstalk between inputs > 70 dB
Operational limit (across temperature range, relative to input range)
Voltage input
– ± 25 mV
– ± 50 mV
– ± 80 mV
– ± 250 mV
– ± 500 mV
– ± 1 V
– ± 2.5 V
– ± 5 V
– 1 to 5 V
– ± 10 V
± 0,35 %
± 0,32 %
± 0,31 %
± 0,3 %
± 0,3 %
± 0,3 %
± 0,3 %
± 0,3 %
± 0,3 %
± 0,3 %
Current input
– 0 to 20 mA
– ± 5 mA
– ± 10 mA
– ± 20 mA
– 4 to 20 mA
± 0,3 %
± 0,3 %
± 0,3 %
± 0,3 %
± 0,3 %
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