In motor drive applications it is sometimes necessary to send an analog speed command signal to a drive. In those cases it is very important to make sure that either the output of the device sending the signal, or the input of the device receiving the signal, is isolated. Having input or output isolation is an added feature and is typically noted on the data sheet of the respective device. Connecting two non-isolated devices together will cause catastrophic damage to both devices. If neither device has isolation, a stand-alone isolation module, such as our ISO202 card, can be used.