How can I have 2 Analog outputs with different ground levels?

[vnv]

I am using NI's DAQ Card PCI-MIO-16E-4 which provides 2 AO channels with same grounds. The application I am dealing with need these analog signals with the different ground levels. Any suggestion is welcome. Thank You.

[rgharrison]

Hi vnv,

Unfortunately, there is no way to separate the ground levels for the analog output. The signals are both referenced with respect to the card's ground signal which is the same as the computer's ground.

Maybe you can tell me more about your application's requirement to have 2 different ground signals and I can maybe find a workaround. Anyway, hope that helps.

Ron

[vnv]

I took over somebody else's work. All I can see is a black box with 2 pairs of inbound wires. Each pair just cannot have the same ground. They seem to me as the differential inputs that are not allowed to reference the voltage level from the same point. Appreciate for your effort.