NI-USB 6259 How to disable Analog output- put in high impedabce mode

[Dimo]

I want to connect AO to a device pin which can be input or active output. Can I disable the output when the device is sourcing voltage (and measure the signal with AI)?

[Jas.W]

Hi Dimo, 

I've had a look into this and from what I can find disabling the output will not switch it to a high impedance state. I think the best solution for this would be to connect a relay to one of the digital outputs and control whenever to disconnect the AO from your device when the device is sourcing. 

Kind Regards,

Jas.W 

[Seth_B.]

I can confirm that the AO lines do not have a high impedance state.  Driving the lines externally can damage them.  Jason's recommendation of an external relay is probably the best route to take.

Regards,

[Dimo]

Thanks Jason and Seth, will try relay or mux.