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NI9401 counter port is interferenced by NI9482

NI9401 counter port is interferenced by NI9482

‎08-20-2018 01:16 AM

NI9401 is used for calculating encoder signal, but when NI9482 is activated to control 220Vsolenoid valve, there are a lot of noise are found in the NI9401 port while the encoder signal isn't generated.  NI9401 is located in the first groove and  NI9482 in the fourth groove of NI 9174.

 

How can I eliminate the noise?  

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