Analog Modules
4-140
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Technical specifications of the SM 331; AI 8 x TC
Dimensions and Weight
Dimensions W x H x D
(in millimeters)
40 x 125 x 117
Weight Approx. 272 g
Data for Specific Module
Supports clocked
operation
No
Length of cable
• Shielded
max. 100 m
Voltages, Currents, Potentials
Power rated voltage of the
electronics L+
24 VDC
• Reverse polarity protection Yes
Constant measured current for
resistance-type sensor
typ. 0.7 mA
Isolation
• Between channels and
backplane bus
Yes
• Between channels and
power supply of the
electronics
Yes
• Between the channels
In groups of
Yes
2
Permitted potential difference
• Between the inputs (U
CM
) 75 VDC / 60 VAC
• Between M
ANA
and
M
internal
(U
ISO
)
75 VDC 60 VAC
Insulation tested with 500 VDC
Current consumption
• From the backplane bus max. 100 mA
• From supply voltage
L+
max. 240 mA
Power dissipation of the module typ. 3.0 W
Analog value generation
Measuring principle Integrating
Module filtering mode 8 channels, hardware
Integration time/conversion
time/ resolution (per
channel)
• Programmable Yes
• Basic conversion time in
ms
95
• Additional conversion
time for open-circuit
monitoring, in ms
4
• Resolution including
sign
16 bits
• Noise suppression
for interference
frequency f1 in Hz
400/60/50
Smoothing of the measured
values
None / low/ average/ high
Basic response time of
module (all channels
enabled)
190 ms
Module filtering mode 8 channels, software
Integration time/conversion
time/ resolution (per
channel)
• Programmable Yes
• Basic conversion time in
ms
23/72/83
• Additional conversion
time for open-circuit
monitoring, in ms
4
• Resolution including
sign
16 bits
• Noise suppression
for interference
frequency f1 in Hz
400/60/50
Smoothing of the measured
values
None / low/ average/ high
Basic response time of
module (all channels
enabled)
46/144/166 ms
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