Agrowtek RD8i Manuale di istruzioni - Pagina 2

Sfoglia online o scarica il pdf Manuale di istruzioni per Relè Agrowtek RD8i. Agrowtek RD8i 14. Digital intelligent dry-contact relay

Introduction

GrowControl RD series dry-contact relays interface Agrowtek's intelligent controllers to devices in your grow-

ing environment to control lighting, ventilation, irrigation, HVAC and much more. Dry-contacts allow many

different types of equipment to be controlled.

A relay consists of a mechanical switch and

an electro-magnet to turn-on (close) a switch

contact. A spring opens the switch when the

electromagnet is no longer powered.

The microprocessor controls power to the

magnet coil to open or close the switch con-

tact as required by the controller program.

Dry-contact relays can be thought of like a wall-switch:

•

Each relay "contact" has a pair of screw terminals just like a wall-switch does.

•

A wall-switch (or relay contact) does not supply power, it only allows it through.

•

Each switch is independent and can operate different circuits or voltages.

A dry-contact relay is exactly the same as a wall switch, however, instead of operating the switch manu-

ally with your finger, an electromagnet operates the switch.

Magnet

OFF

Many types of devices can be operated with a dry-contact switch. A dry-contact interface allows Agrowtek

controls to integrate with building controls, high amperage loads and other custom devices such as:

High-Amp

Relays & Contactors

HVAC Control

Controller

Voltage

Power In Terminal

Magnet

Irrigation / Gas

Solenoids

Magnet Coil

Electro-Magnet

Switch Actuator

Power Out Terminal

Switch Contact

120V Receptacles

& Equipment