Difference between the -R and regular series connectors.
- The RD600-R and other -R models have additional wiring to support a rain sensor. However, it is still possible to use a rain sensor on the older model. Enter rain sensor in the search box for more info on that.
- The biggest difference between the -R models and the standard model is that the -R model has a different size connector (20 pins instead of 16). There are adapters that allow you to convert between the two sizes. You can also do some jury-rigging to make them work, but it’s not a “clean” solution. Alternatively, you can replace the controller and the back-connector board at the same time, which avoids the connector mismatch.
- My favorite new feature of the -R series is the rain delay. If it rains today, you can go out and tell the timer to stop watering for 3 days, or however many you want to delay.
- One other key difference is that the RD600-R series saves the programming in non-volatile memory so even if the battery dies, the programming will be saved. The RD-600 will lose it’s programming if power is removed and the 9V battery is dead or missing.
Should I upgrade to the RD600-R series?
There’s no serious reason to upgrade to the newer series of controllers. The new features are nice, but not really necessary. The repair we do is solid and it will last a long time. Unless the controller is in bad physical shape due to extreme exposure to the elements, it’s usually better to fix it instead of upgrade.