The Riley RAL-4 Four Channel Vibrator Controller, manufactured by Riley Automation Ltd, is a four-output control unit for vibrator motors that runs from a 120 V AC supply. It is rated for 120 V, 50/60 Hz input with a 10 A maximum input current and provides four channels of control in a compact package. The model is discontinued by the manufacturer. The unit weighs approximately 0.46 kg.
