An automation field device comprises at least four connection pins for connecting the field device; a field device electronics adapted, in a first operating state, to provide a 4-20 mA signal via a first and second connection pin, in a second operating state, to be supplied with a supply voltage via the first and a third connection pin and via a fourth connection pin to enable an IO-Link communication or to provide a first switch output and supplementally to provide a second switch output on the second connection pin, and, in a third operating state, to be supplied with the supply voltage via the first and third connection pins and via the fourth connection pin to enable the IO-Link communication or to provide the first switch output and supplementally to provide a 4-20 mA current output on the second connection pin.