Lighting Timer & Controller Accessories
Timer and controller accessories extend the capability of grow room control systems -- relay expansion modules, digital intelligent control relays, motor control relays, and conversion modules that add functionality to existing timer and controller infrastructure. Agrowtek and Titan Controls are the primary brands in this collection, producing commercial-grade relay and control expansion components for grow room automation systems.
Agrowtek Control Relays
Agrowtek GrowControl Digital Intelligent Control Relays are programmable relay modules that add independently controlled switching channels to an Agrowtek or compatible control system. The MX1i Digital Intelligent Motor Control Relay is designed for managing motor loads -- fans, pumps, and other inductive loads that require specialized relay types to avoid contact welding from inrush current. Agrowtek accessories are used in commercial cultivation facilities running Agrowtek's GrowControl platform for integrated environmental management. The Twister T2 Thermal Overload Relay protects motor-driven equipment from overheating by disconnecting power when motor temperature exceeds safe operating limits.
Autopilot Conversion Modules
The Autopilot Analog to Digital Conversion Module allows older analog ballast controllers to interface with digital control systems -- extending the useful life of analog equipment by adding digital control compatibility. For multi-light HID control using a single controller, see the HID lighting controllers collection. Browse environment controllers for complete grow room automation platforms. Fast shipping.
Timer & Controller Accessories FAQ
What is a control relay and why is it used in a grow room?
A control relay is an electrically operated switch -- a low-voltage control signal (from a timer, controller, or sensor output) activates an electromagnet that closes or opens a set of contacts carrying line-voltage current to connected equipment. Relays are used in grow rooms because controllers and timers typically produce low-voltage control signals (0-10V, 24V) that cannot directly switch the line-voltage loads of fans, ballasts, and pumps. The relay provides the electrical isolation and switching capacity to bridge the low-voltage control circuit and the high-voltage load circuit. Intelligent control relays (Agrowtek GrowControl) add programmable logic to this basic function, allowing each relay channel to be independently timed, dimmed, or triggered by sensor thresholds.
What is the difference between a timer and a controller for grow lights?
A timer switches lights on and off at a fixed, pre-programmed schedule -- it operates on the clock regardless of what is happening in the grow room. A lighting controller adds management intelligence: it may respond to sensor inputs (temperature, CO2, humidity) to modify light schedules, manage dimming output, log data, and coordinate multiple devices. For simple setups where the goal is a consistent 12/12 or 18/6 schedule, a quality timer is all that is needed. For commercial operations running CO2 supplementation, VPD management, and integrated environmental control, a platform like TrolMaster Hydro-X or Agrowtek GrowControl provides the coordinated control that a timer alone cannot achieve.
Can I add more lighting circuits to an existing controller?
It depends on the controller platform. Most grow room lighting controllers have a rated maximum circuit capacity -- 4, 8, or 16 circuits depending on the model. If your current controller is at capacity, adding an expansion relay module (where supported by the platform) can increase circuit count without replacing the controller. Agrowtek's modular GrowControl system is designed for this kind of incremental expansion. Autopilot's conversion modules allow integration of older equipment into newer control platforms. If your controller does not support expansion modules, a second controller or upgrade to a higher-capacity unit is the appropriate path. Contact 888-815-9763 to discuss expansion options for your specific controller platform.
