Rain Sensor Installation (Optional) - Toro TMC-424E User Manual

Rain Sensor Installation (Optional)

All Toro rain sensors, including wireless models TWRS and TWFRS (rain/freeze), and wired version
TRS, can be connected directly to the TMC-424E to automatically interrupt irrigation when the preset
rain or (freeze) threshold is met.
A sensor bypass switch is provided to override sensor operation as needed. Refer to page 18 for
additional Rain Sensor operating information.
When the sensor absorbs moisture, it signals the TMC-424E to suspend automatic watering opera-
tions. While irrigation is suspended, SEN is displayed. When the sensor automatically resets (or is
bypassed) enabling the controller to return to automatic operation, the controller will return to normal
program operation.
White Wire
–
– Brown Wire
– Red Wire
– Red Wire
1. Route the sensor wires from the device into the controller housing through the provided
access 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 the
remaining sensor (S) terminal. Connect one (either) red wire to the Hot Post, and the
remaining 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 up
information.
26
TWRFS
Receiver