Analog modules
6.7 Analog input module SM 331; AI 8 x 12 Bit;(6ES7331-7KF02-0AB0)
S7-300 Automation System Module data
6-54 Manual, 08/2006, A5E00105505-04
Technical data
Transducer power supply
• Supply current
• short ciruit-proof
max. 60 mA (per channel)
Yes
Constant current for resistive transducers typ. 1.67 mA
Electrical isolation
• between channels and the backplane bus
• Between channels and electronics power supply
– not for 2-wire transducers
Yes
Yes
Permissible potential difference
• between inputs and M
ANA
(CMV)
– at signal = 0 V
• between inputs (C
MV
)
• between M
ANA
and M
internal
(V
iso
)
typ. DC 2.5 V (> DC 2.3V)
typ. DC 2.5 V (> DC 2.3V)
75 VDC / 60 VAC
Insulation test voltage 500 VDC
Current consumption
• from the backplane bus
• from load voltage L+
max. 50 mA
max. 30 mA (without 2-wire transducer)
Power loss of the module typ. 1 W
Formation 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
• Noise cuppression at interference frequency f1 in Hz
400 60 50 10
• Basic execution time of the module, in ms (all channels
enabled)
24 136 176 816
Measured value smoothing None
Noise suppression, error limits
Noise suppression at F = n (f1 ± 1 %), (f1 = interference frequency)
• 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
To Next Page
Loading...
