Siemens SIMATIC S7-300 Module data - Page 324

Analog modules
6.10 Analog input module SM 331; AI 8 x TC; (6ES7331-7PF11-0AB0)
S7-300 Automation System Module data
6-90 Manual, 08/2006, A5E00105505-04
Technical data
Voltages, currents, electrical potentials
Rated electronics supply voltage L +
• Reverse polarity protection
24 VDC
Yes
Constant measuring current for resistive transducers typ. 0.7 mA
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 channels (U
CM
)
• Between the channels and M
internal
(V
iso
)
60 VAC / 75 VDC
60 VAC / 75 VDC
Isolation test voltage 500 VDC
Current consumption
• from the backplane bus
• from power supply L+
max. 100 mA
max. 240 mA
Power loss of the module typ. 3.0 W
Formation of analog values
Measuring principle Integrating
Mode of operation 8-channel mode (hardware filter)
Integration/conversion time/resolution (per channel)
• programmable
• Basic conversion time in ms
• additional conversion time for wire-break monitoring in ms
• Resolution (including overshoot range)
• Noise suppression at
interference frequency f1 in Hz
Yes
95
4
16 bits (including sign)
400/60/50
Measured value smoothing None / low/ average/ high
Basic execution time of the module (all channels enabled) 196 ms
Mode of operation 8-channel mode (software filter)
Integration/conversion time/resolution (per channel)
• programmable
• Basic conversion time in ms
• additional conversion time for wire-break monitoring in ms
• Resolution (including overshoot range)
• Noise suppression at
interference frequency f1 in Hz
Yes
23/72/83
4
16 bits (including sign)
400/60/50
Measured value smoothing None / low/ average/ high
Basic execution time of the module (all channels enabled) 46 ms/ 144 ms/ 166 ms
Measuring principle Integrating
Mode of operation 4-channel mode (hardware filter)