LOW VOLTAGE CONTROL UNIT LVC-III The Low Voltage Control Module LVC III is used to control one 115 volt motor by any of three means: low voltage wall switch (or an auxiliary control system with dry contacts); RF (Radio Frequency) remote control (range 75 ft.) or IR (Infrared) remote control (range 50 ft.). These options isolate the user from a potential electrical shock. The LVC III can also be used as a Single-Pole, Double-Throw dry closure to control other equipment by the same three means.