Replacing Orbit system
This page lists some instructions about replacing the common types of Orbit system with Netro smart watering controller.
Replacing Orbit model with Netro (model 57114-WT2X 4 stations)
You have 2 common wires and you can insert them into the 2 C slots in the Sprite controller.
You have 4 zones and you can use the 1-4 slots in Sprite to connect the 4 zone wires.
The last step is to hook up the 2 power wires using the Netro power adapter.