Control Relays & Contactors
Your iGrow Series 100™ has 4 or 8 output relays that are provided as dry contacts, i.e. switch closures. If an output is activated to ON, the switch is “closed” (shorted); and if it iis activated to OFF, the switch is “open” (no continuity between the positive and negative terminals).
The board mounted relays are intended as “pilot” relays. For most loads you will want the iGrow Series 100™ outputs to control a load relay or contactor that is connected to the motor. However, in some cases such as irrigation valves that are 24 VAC, you can drive them directly assuming that you are wiring only one or two valves per relay. The maximum run current recommended for each of the iGrow Series 100 relays is 1 amp.