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Notch Filter
The Notch Filter is a built-in feature of the Analog-to-Digital converter (ADC)
that removes line noise in your application. The removal of line noise is also
known as noise immunity.
The Notch Filter attenuates the input signal at the specified frequency.
Choose a Notch Filter based on what noise frequencies are present in the module
operating environment and any sampling requirements that are needed for
control. For example if the Notch Filter setting is 60 Hz, 60 Hz AC line noise and
its overtones are filtered out.
The following Notch Filter settings are available on a 5069-IF8 module:
• 5 Hz
• 10 Hz
• 15 Hz
• 20 Hz
• 50 Hz
• 60 Hz
• 100 Hz
• 200 Hz
• 500 Hz
• 1000 Hz
• 2500 Hz
• 5000 Hz
• 10000 Hz
• 15625 Hz
• 25000 Hz
• 31250 Hz
• 62500 Hz
If you want to filter lower frequency noise, you get a slower input sample rate.
To see where to choose a notch filter for the 5069-IF8 module, see
Rockwell Automation Publication 5000-UM005B-EN-P - November 2015
Current/Voltage Analog Input Module Features (5069-IF8)
Chapter 3
page
93.
39
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