Siemens Simatic SM331 Getting Started page 31

• Interference frequency:
• Trigger for Hardware Interrupt
Figure 6-10
Explanation of the individual settings
Measuring type:
2DMU and 4DMU stand for 2-wire and 4-wire current transducers
--- means that the channels are deactivated. If you deactivate channels
then the remaining channels are processed faster.
Measuring range modules
The required setting of the measuring range module (chapter 4.2.3) is dis-
played.
o Select your power frequency (50 Hz or 60 Hz)
o High limit 18 mA
o Low Limit 6 mA
SM331: Parameterization
29 Getting Started SM331 AI 8x12bit Part1: 4-20mA
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