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

Automate Low-Voltage Climate Equipment Through Six Dry-Contact Relay Channels

HVAC units, humidifiers, and dehumidifiers typically run on 24VAC low-voltage control circuits rather than the higher-voltage wiring used by pumps or lights, and they need their own dedicated switching hardware. The Growlink RelayLINK Module provides six 3.5A dry-contact channels purpose-built for this class of climate equipment, bringing it under Growlink OS scheduling and sensor-based automation.

Front-panel LED indicators show each channel's live status at a glance, which makes troubleshooting a stuck relay or confirming automation is firing correctly much faster than checking a dashboard alone.

Key Features & Benefits

• 6-Channel Dry-Contact Relay: Switches up to six independent 24VAC outputs at 3.5A each.
• Built for Climate Equipment: Purpose-fit for HVAC systems, humidifiers, dehumidifiers, and similar low-voltage devices.
• Front-Panel LED Indicators: Shows real-time channel status for fast visual troubleshooting.
• Growlink OS Integration: All channels are scheduled and sensor-triggered through the Growlink platform.
• Straightforward Retrofit: Installs into existing 24VAC HVAC wiring without a full system replacement.

Who Should Use This

Facilities automating HVAC, humidification, or dehumidification equipment as part of a coordinated climate strategy are the direct fit for RelayLINK, particularly multi-zone operations where sensor-triggered response replaces manual thermostat and humidistat adjustment.

About Growlink

Growlink, founded in 2015, designs low-voltage climate device automation hardware as part of its broader LINKS ecosystem, feeding device status into the Growlink OS platform.

Frequently Asked Questions

What types of devices does the RelayLINK control?

RelayLINK is built for 24VAC low-voltage climate devices, including HVAC systems, humidifiers, and dehumidifiers commonly used in indoor and greenhouse cultivation. It is not designed for higher-voltage loads like pumps or lighting, which fall under QuadLINK instead.

What is the maximum load per channel?

Each of the six channels supports up to 3.5A at 24VAC. Confirm connected equipment stays within this rating to avoid overloading a channel.

How do the LED indicators help with troubleshooting?

Each channel has its own front-panel LED that lights when the relay is active, giving an immediate visual read on which devices are currently powered. This makes it quick to confirm automation fired correctly or spot a channel stuck open or closed.

How is the RelayLINK different from the QuadLINK?

RelayLINK switches low-voltage 24VAC climate equipment across six channels, while QuadLINK switches higher-voltage 120VAC devices such as pumps and lights across four channels. The two are typically deployed together to cover both device classes in one facility.