Analog modules
6.8 Analog input module SM 331; AI 2 x 12 bit; (6ES7331-7KB02-0AB0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
6-67
Technical data
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
• Noise suppression at interference frequency f1 in Hz
400 60 50 10
• Basic execution time of the module, in ms (all channels
enabled)
12 68 88 408
Measured value smoothing None
Noise suppression, error limits
Noise suppression at f = n (f1 " 1 %), (f1 = interference frequency) n=1.2...
• Common-mode noise (CMV < 2.5 V)
• Seriesmode interference (peak value of disturbance <
rated input range)
> 70 dB
> 40 dB
Crosstalk between inputs > 50 dB
Operational limit (across temperature range, relative to input range)
• Voltage input
80 mV
250 mV to 1000 mV
2.5 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 %
Basic error limit (operational error limit at 25 °C, relative to input range)
• Voltage input
80 mV
250 mV to 1000 mV
2.5 to 10 V
± 0,6 %
± 0,4 %
± 0,6 %
• Current input
3.2 mA to 20 mA ± 0,5 %
• Resistance
150 Ω; 300 Ω; 600 Ω ± 0,5 %
• Thermocouple
Types E, N, J, K, L ± 0,7 %
• Resistance thermometer
Pt 100/Ni 100 ± 0,5 %
Pt 100 Klima ± 0,6 %
Temperature error (relative to input range) ± 0.005 %/K
Linearity error (relative to input range) ± 0,05 %
Repetition accuracy (in transient state at 25 °C, relative to
input range)
± 0,05 %
Temperature error of internal compensation ± 1 %
Status, interrupts, diagnostics
Interrupts
• Hardware interrupt when limit has been exceeded
• Diagnostic interrupt
programmable
Channels 0
programmable
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