The 3RS7003-1AE00 is an electronic signal separator/amplifier manufactured by Siemens. It is designed for use with DIN rail mounting, and has a 4÷20mA current signal input and 24VDC/24VAC power supply. It also offers opto-coupler isolation, LED indication and a power supply LED. The device is suitable for isolating analog signals, amplifying DC signals and providing signal electronic separation.