How to wiring single ended to differential input?

[toninlg]

Hello,

I have an analog output PLC module that is single ended : analog out and analog ground. I want to use this signal to control a differential analog input from a servodrive : analog+ analog- and analog gnd. How can I wire this with a twisted shielded cable in order to minimize the EMC problems, that I seem to have?

Thanks a lot.

 

[pankajdudulwar]

Use the cct as shown in the figure attached.

 

[Eugen_E]

You can use a differential amplifier, to convert from single ended to differential.

Or simply connect the Command- line to ground (for ac using a decoupling capacitor), and aply the signal to the Command+ input (using a decoupling cap if the signal is ac).

 

[toninlg]

The signal has a low frequency. If the signal doesn't change during some times, I will lose informations if I use a decoupling capacitor?
How can I choose the value of the decoupling capacitors?

 

[ch1k0]

Many ways shown attached file. Pls push HELPED!