GrowDirector DryContactDirector - Dry Contact ControllerAutomate dry contacts and enjoy complete remote control capabilities. DryContactDirector lets you automate and control up to 64,000 electrical devices (when used in series), including high power or low voltage appliances and equipment, remotely and precisely. Single module can handle 4 dry contacts. DryContactDirector is an advanced automation solution that allows you to seamlessly operate up to 64,000 dry contacts without any need for manual input.