Sig Infeed System RAL-4A Four Channel Vibrator Controller, part number D18615/120, is a four-channel control unit designed to operate vibratory actuators within a Sig Infeed System installation. The model designation D18615/120 identifies this specific variant used in RAL-4A configurations for multi-channel vibration control. In industrial feeder applications, this controller manages four vibratory elements as part of the RAL-4A system.
