Growlink relayLINK Dry Contact Controller for Multi-Device Grow Automation
The Growlink relayLINK Dry Contact Controller drives up to six independent devices through 3.5A Form A (N.O.) dry contacts. Each channel carries its own LED status indicator on the front panel for live troubleshooting. Power input runs 9–24VDC at 1.5A, with an operating range of 50–122°F and 0–75% RH non-condensing. The unit attaches to standard DIN rail with the included mounting kit, and Made-in-USA build keeps it serviceable in agricultural environments.
Centralized 6-Channel Relay Module Wiring for HVAC, Fans, and Pumps
Unlike standalone outlet relays, the relayLINK requires a Growlink HUB. Connect via the included 10-foot RJ-45 cable to a free HUB port and the six channels register in Growlink OS within a minute. Place the controller close to the equipment cluster it switches so the dry-contact runs stay short. Daisy-chain the device wires from each Form A (N.O.) terminal back to the controlled gear. The 6-channel relay module handles mixed-voltage loads cleanly. Wire 24VAC HVAC stage calls on channels 1–2, line-voltage fans on 3–4 through external contactors, and CO2 valves or irrigation solenoids on 5–6. Mapping channels by sub-system rather than device type keeps the wiring diagram readable when adding a seventh or eighth relayLINK to scale beyond six devices. The trade-off is that every relayLINK needs a HUB port — plan port counts first if a build will use multiple modules.
Key Features
- 6x 3.5A Form A (N.O.) Dry Contacts: Six independent channels each carrying up to 3.5A for HVAC, fans, pumps, and mixed-voltage equipment.
- Per-Channel LED Status Indicators: Front-panel lights show real-time state of every relay for fast troubleshooting at the controller.
- DIN Rail Compatible: Mounts directly to a standard DIN rail with the included kit for clean panel installs.
- Growlink HUB Integration: Connects over the included 10-foot RJ-45 cable and exposes all six channels to Growlink OS for scheduling, alerts, and remote control.
- Made in the USA: Built for demanding agricultural environments with serviceable construction and replaceable hardware.
Technical Specifications
| Specification | Value |
|---|---|
| Input Power | 9–24VDC, 1.5A |
| Outputs | 6× Form A (N.O.) Dry Contacts |
| Output Rating | 3.5A per channel |
| Status Indicators | LED per channel (front panel) |
| Operating Temperature | 50–122°F (10–50°C) |
| Operating Humidity | 0–75% RH (non-condensing) |
| Dimensions | 7.75" × 7.75" × 3.75" |
| Connection | 1× RJ-45 to Growlink HUB |
| Mounting | DIN rail compatible |
| Included Hardware | Mounting kit, 10-foot RJ-45 cable, screwdriver |
| Hub Required | Yes (Growlink HUB) |
| Country of Origin | Made in USA |