3 Pin Plug Terminator is a XLR connector plug with a 120 Ohm resistor inside connected to the data lines.Plug this in at the last unit and perceives the cable as endless. Otherwise reflections can be caused in of the cable creating problems that can be very difficult to Avoid this by terminating of the cable. A 120 Ohm DMX512 Terminator in an XLR connector. Connector: XLR 3 Pin Male. Gold-plated pins on the connector. The XLR 3Pin 512 Terminator Resistor is a key component in the 512 control system, which is used to terminate the signal chain, avoid signal reflection and interference, and the stability and signal quality of the system.It uses a resistance value of 120Ω to match the characteristic impedance of 512 and is designed to be built into the XLR 3-pin connector for easy installation and use. In stage lighting, sound systems and other control applications, terminal resistors are a necessary tool to proper system operation and maintain signal quality., Weight: 0.05952481074 pounds, Manufacturer: Jeerylow