The R401/400 series beacon is a cost effective, single stage alarm, suitable for a wide range of applications where a powerful and commanding signal is required. It incorporates a parabolic reflector which, when energised, revolves around a continuously illuminated lamp. This creates a powerful beam of light that sweeps through 360 degrees. The reflector is driven by a twin belt drive system that is powered by a series wound motor for ‘AC’ units and a permanent magnet motor for ‘DC’ units. The design allows for termination inside the enclosure through the base.