Sourcing and Sinking PLC I/O using a sensor

Steve Brown over 5 years ago

Hi I need help as I'm just not getting this..

Sinking - Power externally supplied. Current passes through load, then into sensor and then to ground.

Sourcing - Sensor uses supply voltage to pass current. Sensor drives current out, through the load on to ground.

I really can't picture how this works even using google images!

Does sinking have a constant supply and sourcing doesn't?

Sorry it just isn't making sense to me.

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0 Steve Brown over 5 years ago

Hi Paul,

I haven't looked at inputs yet to be honest as we haven't covered them in college. Only outputs and that was a brief skim, hence why I had to do further research. If you wouldn't mind explaining inputs also, in the same fashion, I would be grateful.

Thanks
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0 Steve Brown over 5 years ago

Hi Paul,

I haven't looked at inputs yet to be honest as we haven't covered them in college. Only outputs and that was a brief skim, hence why I had to do further research. If you wouldn't mind explaining inputs also, in the same fashion, I would be grateful.

Thanks
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Sourcing and Sinking PLC I/O using a sensor

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