Hi guys,

I have a fan tachometer signal that is faster than my PLC can manage to read.
Is there any readily available PCBs out there, that would be able to take the tach signal, analyse it, and provide a simple ON/OFF output based on the speed?

 

Hi guys,

I have a fan tachometer signal that is faster than my PLC can manage to read.
Is there any readily available PCBs out there, that would be able to take the tach signal, analyse it, and provide a simple ON/OFF output based on the speed?

Welcome to AAC.

This module might work for you. It is a frequency to 0-10V converter. While it is not go-no go, it would allow you to have a compatible signal for the PLC.

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If you can’t handle the analog signal directly, you could add something like this voltage comparator module. The output of the frequency to voltage module would go into this one, and you would set a threshold voltage to indicate on/off—then treat the relay as a dry contact closure

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Perfe

Welcome to AAC.

This module might work for you. It is a frequency to 0-10V converter. While it is not go-no go, it would allow you to have a compatible signal for the PLC.

View attachment 313610
​

If you can’t handle the analog signal directly, you could add something like this voltage comparator module. The output of the frequency to voltage module would go into this one, and you would set a threshold voltage to indicate on/off—then treat the relay as a dry contact closure

View attachment 313611​

Perfect, this should do the trick. Thank you very much!