What’s the difference between an RD-600 and RD600-R

Difference between the -R and regular series connectors.

  1. 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.
  2. 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.
  3. 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.
  4. 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.
Contact us or enter a question/comment on the Q&A page if you have more questions.

2 thoughts on “What’s the difference between an RD-600 and RD600-R

  1. My RD.600.R is simply dead. No indication it is even receiving electricity although I know the outlet is good. Should I send it in for repair? How long does it take? My yard is dying now.

    • Hi Nancy,

      Yes, definitely send the sprinkler timer in; I usually repair it and have it back in the mail the next day. I’ll follow up with a separate email including details.

      Thanks,
      Brian

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