Installation, continued13Connecting an Optional SensorThe MDC2 Controller allows you to connect anoptional sensor. The controller works with any openor closed switch sensor.Warning! The wires you use to connect thecontroller to the sensor must be approvedfor underground use Rain Bird®recommendsusing a two-wire #18 AWG (maximum gauge)cable long enough to easily reach thecontrollerWarning! Install the sensor wire in thesame conduit you use for the two-wirecommunications cable and ground wireThe conduit for the power wires shouldonly contain the power wiresTo connect the sensor’s wires to the controller,1. Remove about 6” of the cable’s outer sheathingand strip about 5/8” of the insulation from theends of the two wires.2. Using wire nuts, connect the two-wire cable tothe sensor wires inside a valve box.3. Protect all underground splices with DBYconnections. Insert the wire nuts into the DBYconnectors and close the gap tightly. Place theconnectors inside the valve box.4. Run the two-wire cable leading from the sensorwires through a conduit and into the controllercabinet. Use the same conduit you used for thecommunications cable.5. Using a thin blade screwdriver, connectthe sensor cable wires to SENSOR terminal 1and SENSOR terminal 2 inside the controller.Tug on the wires to make sure the connectionsare secure.You have now completed mounting and wiring yournew MDC2 Controller.
