Siemens SIMATIC - Page 373

Analog modules
6.8 Analog input module SM 331; AI 2 x 12 Bit; (6ES7331-7KB02-0AB0)
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
373
Technical specifications
Generation of analog values
Measuring principle Integrating
Integration/conversion time/resolution (per channel)
• programmable
Yes
• Integration time in ms
2.5 16
2
/
3
20 100
• Basic conversion time, including the integration time in ms
3 17 22 102
Additional conversion time for resistance measurement, in ms
or
1 1 1 1
additional conversion time for wire-break monitoring in ms
or
10 10 10 10
additional conversion time for resistance measurements
and
wire-break monitoring in ms
16 16 16 16
• Resolution in bits (including overshoot range)
9 bits 12 bits 12 bits 14 bits
• Interference frequency suppression at interference fre-
quency f1 in Hz
400 60 50 10
• Basic execution time of the module in ms (all channels
enabled)
6 34 44 204
Measured value smoothing
none
Interference frequency suppression, error limits
Interference frequency suppression at f = n (f1 ± 1%), (f1 = interference frequency) n=1.2...
• Common mode interference (V
CM
< 2.5 V)
• Seriesmode interference (peak interference value < rated
input range)
> 70 dB
> 40 dB
Crosstalk between inputs
> 50 dB
Operational limit (across entire temperature range, relative to the measurement range end value of the selected input
range)
• Voltage input
80 mV
250 mV to 1,000 mV
2.5 V to 10 V
± 1 %
± 0.6 %
± 0.8 %
• Current input
3.2 mA to 20 mA ± 0.7 %
• Resistance
150 Ω; 300 Ω; 600 Ω ± 0. 7 %
• Thermocouple
Types E, N, J, K, L ± 1. 1 %
• Resistance thermometer
Pt 100/Ni 100 ± 0. 7 %
Pt 100 Klima
± 0. 8 %