We have many isolation boards for use with a DAP based test system. Isolation protects the DAP and PC from high voltages and also provides the independence from ground that some applications require. This means that ground loop are not created, ensuring more accurate measurement of signals.
Some systems require only isolation from the PC ground. Others will require the added benefit of the more exacting channel-to-channel isolation, to keep each signal isolated from all others. We have isolation boards with both levels of isolation for analog input and output signals, and digital I/O