Potentiometric to DC isolator/converter, accepts the signal from the rheostat (2 wires) or the potentiometer (3 wires) and analogue current output (0-20mA and 4-20mA) or voltage (0-5/1- 5/0-10 and 2 to 10Vdc). Power supply: 10 to 40Vdc or 19 to 28Vac