Growlink LINKS RelayLINK Module — 6-Channel 24VAC Controls up to 8 Devices Independently

Precision 24VAC Climate Device Automation with the Growlink RelayLINK Module

The Growlink™ LINKS RelayLINK Module provides precise, independent control of up to eight 24VAC devices within indoor growing environments, delivering automated management of the climate systems that most directly affect plant health — including HVAC units, humidifiers, dehumidifiers, and other low-voltage environmental equipment. Featuring six 3.5A dry-contact channels, the RelayLINK integrates into the Growlink LINKS ecosystem for centralized automation through Growlink OS.

Front-panel LED status indicators provide real-time visibility into each channel's active state, simplifying monitoring and troubleshooting in busy grow environments. Its straightforward integration into existing setups, combined with Growlink's automation capabilities, allows cultivators to coordinate multiple climate devices in response to sensor data or scheduled programs — creating a responsive, precisely managed environmental control system. Made in the USA.

Key Features & Benefits

• 6-channel dry-contact relay — controls up to six independent 24VAC outputs, each capable of switching 3.5A for reliable operation of low-voltage climate equipment.
• Controls up to 8 devices independently — flexible channel assignment supports independent operation of multiple climate devices on different schedules or triggers.
• 24VAC compatibility — designed for low-voltage HVAC systems, humidifiers, dehumidifiers, and mixed-voltage environmental equipment common in cultivation facilities.
• LED status indicators — front-panel LEDs display real-time channel status for instant visibility into device activity and simplified troubleshooting.
• Growlink OS integration — all relay channels are managed through the Growlink platform for centralized scheduling, sensor-based automation, and remote control.
• Easy integration into existing setups — designed for straightforward installation with existing 24VAC HVAC infrastructure without requiring full system replacement.
• Made in the USA — engineered to commercial cultivation standards for professional-grade reliability.

Who Should Use the Growlink RelayLINK Module

The RelayLINK is essential for commercial cultivators who need to automate 24VAC climate control devices — particularly HVAC systems, humidifiers, and dehumidifiers — within a Growlink automation environment. It is especially valuable in facilities running multiple climate devices across different zones where centralized, sensor-responsive control through Growlink OS reduces the manual overhead of climate management.

Centralized Climate Device Automation for Indoor Growing Environments

Maintaining precise environmental conditions across an active grow facility requires the coordinated operation of multiple climate systems — HVAC, humidification, dehumidification, and ventilation must respond dynamically to real-time sensor data to keep temperature, humidity, and VPD within target ranges throughout every photoperiod. The RelayLINK brings all 24VAC climate devices under a single Growlink OS control layer, enabling sensor-triggered responses that eliminate the delays and inconsistencies of manual adjustment and create a tighter, more responsive climate management system.

Frequently Asked Questions

What types of devices can the RelayLINK control?

The RelayLINK is designed for 24VAC low-voltage devices including HVAC systems, humidifiers, dehumidifiers, and other mixed-voltage environmental equipment commonly used in indoor cultivation and greenhouse environments.

What is the maximum load per channel?

Each of the six channels supports up to 3.5A at 24VAC. Ensure connected devices do not exceed this rating to avoid overloading individual relay channels.

Does the RelayLINK require a Growlink HUB?

The RelayLINK integrates with the Growlink LINKS platform. A Growlink HUB or compatible LINKS infrastructure is required to connect the module to Growlink OS for automation programming and remote management.

How do the LED status indicators help with troubleshooting?

Each channel has a dedicated front-panel LED that illuminates when the relay is active, providing an immediate visual indication of which devices are currently powered on. This makes it easy to verify automation is functioning correctly and quickly identify any channels that may be stuck open or closed.

What is the difference between the RelayLINK and the QuadLINK?

The RelayLINK controls 24VAC low-voltage signals (HVAC, humidifiers, dehumidifiers) with 6 dry-contact channels. The QuadLINK controls 120VAC high-voltage devices (irrigation pumps, CO₂ systems, fans, lights) with 4 channels. They serve complementary roles — the RelayLINK handles climate equipment, the QuadLINK handles powered cultivation devices.