TMC-424 - Thewatershed.biz

Rain Sensor Installation (Optional)All Toro rain sensors, including wireless models TWRS and TWFRS (rain/freeze), and wired versionTRS, can be connected directly to the TMC-424E to automatically interrupt irrigation when the presetrain or (freeze) threshold is met.A sensor bypass switch is provided to override sensor operation as needed. Refer to page 18 foradditional Rain Sensor operating information.When the sensor absorbs moisture, it signals the TMC-424E to suspend automatic watering operations.While irrigation is suspended, SEN is displayed. When the sensor automatically resets (or isbypassed) enabling the controller to return to automatic operation, the controller will return to normalprogram operation.– White Wire– Brown Wire– Red WireTWRFSReceiver– Red Wire1. Route the sensor wires from the device into the controller housing through the providedaccess hole.2. Remove the jumper wire installed between the sensor terminals.3. Connect the white wire to the top sensor (S) terminal. Connect the brown wire to theremaining sensor (S) terminal. Connect one (either) red wire to the Hot Post, and theremaining red wire to a station common (C) terminal.4. Set the sensor switch to the Sensor Active position.5. Refer to the instructions provided with the rain sensor for detailed installation and set upinformation.26