Is any extra isolation required when using Analog output to dirve higer power circuitry?

[swifty]

I want to connect the analog output of a DAQcard-1200 to a current amplifier to give 5A and a tranformer to give approx 200V, is any extra isolation required to protect the card?

[Ben]

Hi Swifty,

If your current amp requires less of everything the teh DAQ-1200 supplies, you should not have to add any thing other than maybe a fuse, just to be sure.

Make sure you look at all of the spec's. Including peak and max values.

Ben

[Rolf]

"Ben" wrote in message
news:506500000005000000408F0000-1027480788000@exchange.ni.com...
> Hi Swifty,
>
> If your current amp requires less of everything the teh DAQ-1200
> supplies, you should not have to add any thing other than maybe a
> fuse, just to be sure.
>
> Make sure you look at all of the spec's. Including peak and max
> values.
>
> Ben

Although it is indeed not absolutely required it is a very bad idea not to
use galvanic
isolation between your DAQ card and a 200 V output amp unless the amp has
already galvanic isolation built in. If the amp breaks and sources its full
voltage to the
DAQ card you not only get a destroyed DAQ card AND computer but possible
claims for injury of the operator who happened to sit at the computer at the
time

the amp blew up.

Rolf

[Ben]

Wonderful point Rolf!

Swifty, be sure to check as Rolf has indicated.

Thanks again Rolf.

Ben