The LightLEEDer Relay Driver Module controls the new Reliant40 relays. Relay driver modules can be easily added to existing LightLEEDer panels if more relays are required. Attaches onto 4 push-on standoffs in the panel, and all connections are made with push-on connectors with no wires to terminate. Each module has built in optical isolation and is designed to control up to 8 single pole relays. Every module has a built in power LED indicator.