The DMX Terminator plugs into the XLR feed-through connector of the final DMX512 device on a control cable. It improves signal reliability by preventing reflections and reducing ringing. A “happy” LED indicates a strong signal. Three Tranzorb transient-absorbing diodes suppress spikes caused by electrical storms. Radio frequency interference (RFI) is bypassed to chassis by the .001uF capacitance of the Tranzorb diode.