The 3RS7020-1ET00 is a signal separator/amplifier manufactured by Siemens. It has a DIN mounting, and is suitable for use in a temperature range of -25 to 60°C. It is designed to convert 4 to 20 mA signals, and is used in a variety of process control applications. This device is designed to separate two analogue signals, for example for a remote reading measurement or for regulation between two plants.