Is an isolation transformer necessary?
On One Hand: Direct Physical ConnectionWhen coupling electric power or an electronic signal from one location or circuit to another, a direct wire connection carries both AC (alternating current) and DC (direct current) components of the signal.On the Other: Transformer ConnectionWhen coupling electric power or an electronic signal from one location or circuit to another, an isolation transformer connection allows only the AC components to pass, but blocks the DC components.Bottom LineIf you need to isolate a DC component from a signal for safety, noise reduction or to channel DC voltage to power a separate device, you need an isolation transformer.
