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In my analogue output circuit, ocurrs the following ripple voltage occurs when wired to the analogue input of a PLC with an input resistenceresistance of 69.3K3 kΩ.   

Ripple Issue

If, I put a resistor in serieseries, this ripple dissapeardisappears.

Why that is that? Is ait an impedance problem?  

The schematic of the circuit is the next: Output Schematic

Thanks for your help!! Regards.Output Schematic

In my analogue output circuit, ocurrs the following ripple voltage when wired to analogue input of PLC with input resistence of 69.3K.  Ripple Issue

If, I put a resistor in serie, this ripple dissapear.

Why that is? Is a impedance problem?  

The schematic of circuit is the next: Output Schematic

Thanks for your help!! Regards.

In my analogue output circuit, the following ripple voltage occurs when wired to the analogue input of a PLC with an input resistance of 69.3 kΩ. 

Ripple Issue

If I put a resistor in series, this ripple disappears.

Why is that? Is it an impedance problem?

The schematic of the circuit is the next:

Output Schematic

    Became Hot Network Question
1
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LM324 - Issue with output in negative feedback

In my analogue output circuit, ocurrs the following ripple voltage when wired to analogue input of PLC with input resistence of 69.3K. Ripple Issue

If, I put a resistor in serie, this ripple dissapear.

Why that is? Is a impedance problem?

The schematic of circuit is the next: Output Schematic

Thanks for your help!! Regards.