Model QLS Quad Loop Splitter Splits One 4-20 mA Current Loop into 4 Independent Loops
Model QLS overcomes problems associated with the common industrial wiring practice where the same 4-20 mA signal from a transmitter is sent to multiple devices in series. In such a circuit, the devices in the loop cannot share a common ground, but must be electrically floating, which is often not possible. When any device in the loop is removed, fails or if a wiring fault occurs, all other devices in the loop loose their 4-20 mA signal. In a single loop, the transmitter voltage compliance limit may be exceeded, since the voltage drops across loads in series are additive. Also, the 4-20 mA signal to each load cannot be individually adjusted for calibration purposes.