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Adding a Rain Sensor to Toro Vision 1 Controller

Universal Rain Sensor Wiring

Any controller can accept a rain sensor by interrupting the common wire to the valves.

Wiring Steps

Disconnect the common (C) field wire from the controller's C terminal.
Connect that wire to one lead of the rain sensor.
Connect the other sensor lead to the controller's C terminal.
Mount sensor in open, unobstructed location.

How It Works

When rain exceeds the set threshold (e.g., ¼"), the sensor opens the circuit, breaking common continuity. The controller still "runs" but no voltage reaches the valves.

Sensor Types

Expanding disk: Mechanical, reliable (e.g., Rain Bird RSD, Hunter Rain-Clik).
Electronic: Faster response, adjustable.

No other wiring method is needed for basic rain shutoff.

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