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Delivering Confidence You Can Grow With!
Link4 Helps growers thrive with smart, cloud-connected greenhouse and grow room controls. Monitor, manage, and protect your crops from anywhere with instant text alerts and alarms.

Pearl Digital Controller Module

The Optimal Solution for a Smart, Climate-Controlled Greenhouse
Revolutionize your operations with Link4’s 4th-generation cloud-connected system, tailored for commercial growers to effortlessly enhance yield and crop quality.

Main Features:
  • Unmatched Scalability: Expand with additional modules to handle up to 128 inputs and outputs.
  • Seamless Connectivity: Ethernet access for uninterrupted cloud integration.
  • Robust Design: Surge-protected power for uninterrupted operation.
  • Effortless Maintenance: Quick-change communication keys
  • User-Friendly: Bright sunlight-readable display & USB for backup
Specifications:
  • 128 Inputs and outputs (expandable)
  • Ethernet and LBus for cloud integration
  • Bright, sunlight-readable LCD screen
  • Isolated power and surge protection
  • Modbus RTU ports

Custom Integrated Contractor Panels

Unlock your greenhouse’s potential with Link4’s UL508A-certified Contactor Panels.
Pre-mounted with Pearl environmental controllers, they streamline setup by eliminating the need for extra enclosures.

Main Features:
  • Enjoy seamless integration with the Pearl controller, relay module, and contactors for full automation.
  • Easily accommodate single-phase and 3-phase motors with high-amperage contactors.
  • Stay connected with remote access and alerts via Link4 Cloud (subscription required).
  • Trust UL508A certification for secure high-voltage installations.
  • Protect your investment with a durable NEMA 4 enclosure for wet conditions.
Specifications:
  • Controller: Pearl advanced environmental controller
  • Outputs: 8-relay output module for flexible device control
  • Contactors: (3) 3-pole 18A contactors for high-power motors
  • Sensors: Integrated temperature & humidity sensor (I2C version)
  • Connectivity: Ethernet for Link4 Cloud remote access & alarms
  • Enclosure: White metallic NEMA 4 for wet/humid installations
  • Certification: UL508A- approved for safe, high-voltage operation

Pearl Standalone Controller

The Pearl Standalone Controller is a robust solution engineered for seamless integration and ultimate control.
Main Features:
  • Plug & Play Installation: Includes a wall power plug for fast and simple setup
  • Integrated Sensor Included: Digital temperature and humidity sensor via I2C
  • 8 Pilot Relay Outputs: Control multiple devices with low-voltage pilot relays
  • Weather-Resistant Enclosure: IP65-rated with front access window
  • Retrofit Ready: An excellent upgrade for older control system
Specifications:
  • Power supply: 24VDC
  • Enclosure: IP65 weather-resistant
  • Ethernet, USB, Wi-Fi, 4G* (*check for availability)
  • Requirements: Internet, cloud connectivity, cloud subscription, and a power outlet 5 isolated Modbus RTU ports
Digital Temperature and Humidity Sensor Via I2C (Included) 
  • Supply Voltage    2.4-5.5V
  • Communication    I2C, up to 1 MHz, 2 selectable addresses
  • Temperature accuracy    ±0.3 °C
  • Humidity accuracy    ±2% RH
  • Humidity Range    0-100% RH
  • Temperature Range    -40 – 125°C
  • Package    8-Pin DFN, 2.5 x 2.5 x 0.9mm
  • Current Consumption    2 µA avg, 800 µA measuring
  • Response Time    RH: 86 s, Temp: >2 s

iDrive Motor Controller

Link4 iDrive Motor Controllers deliver smart, reliable motor control for natural ventilation in commercial grow environments.
Main Features:
  • Automates ridge, sidewall, and curtain vents
  • Compatible with 24VDC, 120VAC, and 240VAC motors
  • Manual, automatic, or thermostat-controlled operation modes
  • Mounts easily in tight greenhouse spaces
  • Manual override & motor-reverse delay
  • UL/cUL approved and built to industry standards
  • Integrates with Link4’s iGrow and Pearl controllers
Specifications:
  • Motor types: 24VDC, 120VAC, 240VAc
  • Modes: Manual, Timed, Sensor-Based
  • Safety: Current sensing overload protection
  • Installation: DIN rail or wall mount options
  • NEMA 4 Cabinet
  • Available as single or dual drives
  • Phase: Single or three-phase capable
  • Wires: 3 or 5 wire motors
Learn more about our partner on their website: Link4 Corporation
Delivering Confidence You Can Grow With!
Link4 Helps growers thrive with smart, cloud-connected greenhouse and grow room controls. Monitor, manage, and protect your crops from anywhere with instant text alerts and alarms.

Pearl Digital Controller Module

The Optimal Solution for a Smart, Climate-Controlled Greenhouse
Revolutionize your operations with Link4’s 4th-generation cloud-connected system, tailored for commercial growers to effortlessly enhance yield and crop quality.

Main Features:
  • Unmatched Scalability: Expand with additional modules to handle up to 128 inputs and outputs.
  • Seamless Connectivity: Ethernet access for uninterrupted cloud integration.
  • Robust Design: Surge-protected power for uninterrupted operation.
  • Effortless Maintenance: Quick-change communication keys
  • User-Friendly: Bright sunlight-readable display & USB for backup
Specifications:
  • 128 Inputs and outputs (expandable)
  • Ethernet and LBus for cloud integration
  • Bright, sunlight-readable LCD screen
  • Isolated power and surge protection
  • Modbus RTU ports

Custom Integrated Contractor Panels

Unlock your greenhouse’s potential with Link4’s UL508A-certified Contactor Panels.
Pre-mounted with Pearl environmental controllers, they streamline setup by eliminating the need for extra enclosures.

Main Features:
  • Enjoy seamless integration with the Pearl controller, relay module, and contactors for full automation.
  • Easily accommodate single-phase and 3-phase motors with high-amperage contactors.
  • Stay connected with remote access and alerts via Link4 Cloud (subscription required).
  • Trust UL508A certification for secure high-voltage installations.
  • Protect your investment with a durable NEMA 4 enclosure for wet conditions.
Specifications:
  • Controller: Pearl advanced environmental controller
  • Outputs: 8-relay output module for flexible device control
  • Contactors: (3) 3-pole 18A contactors for high-power motors
  • Sensors: Integrated temperature & humidity sensor (I2C version)
  • Connectivity: Ethernet for Link4 Cloud remote access & alarms
  • Enclosure: White metallic NEMA 4 for wet/humid installations
  • Certification: UL508A- approved for safe, high-voltage operation

Pearl Standalone Controller

The Pearl Standalone Controller is a robust solution engineered for seamless integration and ultimate control.
Main Features:
  • Plug & Play Installation: Includes a wall power plug for fast and simple setup
  • Integrated Sensor Included: Digital temperature and humidity sensor via I2C
  • 8 Pilot Relay Outputs: Control multiple devices with low-voltage pilot relays
  • Weather-Resistant Enclosure: IP65-rated with front access window
  • Retrofit Ready: An excellent upgrade for older control system
Specifications:
  • Power supply: 24VDC
  • Enclosure: IP65 weather-resistant
  • Ethernet, USB, Wi-Fi, 4G* (*check for availability)
  • Requirements: Internet, cloud connectivity, cloud subscription, and a power outlet 5 isolated Modbus RTU ports
Digital Temperature and Humidity Sensor Via I2C (Included) 
  • Supply Voltage    2.4-5.5V
  • Communication    I2C, up to 1 MHz, 2 selectable addresses
  • Temperature accuracy    ±0.3 °C
  • Humidity accuracy    ±2% RH
  • Humidity Range    0-100% RH
  • Temperature Range    -40 – 125°C
  • Package    8-Pin DFN, 2.5 x 2.5 x 0.9mm
  • Current Consumption    2 µA avg, 800 µA measuring
  • Response Time    RH: 86 s, Temp: >2 s

iDrive Motor Controller

Link4 iDrive Motor Controllers deliver smart, reliable motor control for natural ventilation in commercial grow environments.
Main Features:
  • Automates ridge, sidewall, and curtain vents
  • Compatible with 24VDC, 120VAC, and 240VAC motors
  • Manual, automatic, or thermostat-controlled operation modes
  • Mounts easily in tight greenhouse spaces
  • Manual override & motor-reverse delay
  • UL/cUL approved and built to industry standards
  • Integrates with Link4’s iGrow and Pearl controllers
Specifications:
  • Motor types: 24VDC, 120VAC, 240VAc
  • Modes: Manual, Timed, Sensor-Based
  • Safety: Current sensing overload protection
  • Installation: DIN rail or wall mount options
  • NEMA 4 Cabinet
  • Available as single or dual drives
  • Phase: Single or three-phase capable
  • Wires: 3 or 5 wire motors
Learn more about our partner on their website: Link4 Corporation