Analog modules
6.4 Analog input module SM 331; AI 8 x 16 Bit; (6ES7331-7NF10-0AB0)
S7-300 Automation System Module data
6-20 Manual, 08/2006, A5E00105505-04
Technical data
Electrical isolation
• between channels and the backplane bus
• between channels and electronics power supply
• between channels
in groups of
Yes
Yes
Yes
2
Permissible potential difference
• between inputs (CMV)
60 VAC / 75 VDC
• Between the inputs and M
internal
(V
iso
)
60 VAC / 75 VDC
Isolation test voltage 500 VAC
Current consumption
• from the backplane bus
• from power supply L+
max. 100 mA
max. 200 mA
Power loss of the module typ. 3.0 W
Formation 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
• Noise 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)
Noise suppression, error limits
Noise 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 temperature range, relative to input range)
• Input voltage
• Input current
±0,1%
±0,1%
Basic error limit (operational error limit at 25 °C, relative to 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%
Repetition accuracy (in transient state at 25 °C, relative to input
range)
±0,01%
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