The OM-8 dry contact board allows the main controller to control up to 8 individual outputs on it. It is specially designed for the Hydro-X Pro and Aqua-X Pro system. It has 8 individual electrical contacts, and allows up to 12 Amp current through each contact.  *The OM-8 should be mounted inside an electric control cabinet, and connected to a power supply between 100-240 VAC.