Wiring Label (Generation 2)
Not sure how to wire your controller? No sweat.
The Rachio controller, Generation 2 is designed to accommodate two sensors, a master valve or pump relay, and up to 16 zones. If you're having trouble reading the terminal labels, please reference the wiring guide below:
|C||Common (use any or all)|
|# (1-16)||Zone # (reference old timer wiring)|
|M||Master Valve or Pump Relay; see Advanced Wiring|
|S1||Sensor 1 (Rain or Flow)|
|S2||Sensor 2 (Rain or Flow)|
|SP||Sensor Power (Wireless Rain Sensor)|
Tips for Wiring:
- 24VAC and ground wires are not needed.
- An enclosure is required for hard wiring installations and/or outdoor installation.
- When inserting or releasing wires, push IN on terminal block with a small screwdriver. This will ensure a solid connection.
- Solid 18 gauge single-strand copper wiring is ideal. If you have thicker gauge wires we recommend retrofitting with 18 gauge wires using a terminal strip.