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

TMC424_UGE_466A 1/22/08

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 automati-
cally 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 operations. 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.
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TWRFS
Receiver