The 3 terminal control module (AM466) is general purpose control module which includes the ground pin. It can be used for switching resistive as well as inductive loads. Uses include heaters, chillers, lighting systems, pumps, and powerheads. This control module responds to only the on and off commands sent from the AquaController. Its max specifications are 500W incandescent lamp, 1/3 HP motor load, or 15A resistive load. The physical dimensions of the module are 2.3" x 2.9" x 1.4".