4-20 Ma Signal Splitter, 24V Dc Signal Isolator, 24V Dc Signal Isolator 2 in 4 Out Direct Current Signal Conditioner Transmitter Plc Detection (4-20Ma). 4-20 Ma Signal Splitter, 24v Dc Signal Isolator 2 in 4 Out Direct Current Signal Conditioner Transmitter PLC Detection (4-20ma).