Analog modules
6.7 Analog input module SM 331; AI 8 x 12 Bit;(6ES7331-7KF02-0AB0)
S7-300 Automation System Module data
6-52 Manual, 08/2006, A5E00105505-04
Note
• "Resistance measurement" is only available at one channel per group. The "2nd" channel
of the group is used accordingly for current impression (I
C
). The "1st" channel of the
group returns the measured value. The "2nd" channel of the group has the default
overflow value "7FFF
H
."
• There is no performance resistors compensation with "2- and 3-wire connections".
Wiring: Thermocouples with external compensation
With internal compensation, there must be a bridge between Comp+ and M
ANA
.
9
7
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Figure 6-17 Block diagram and wiring diagram
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