A Relay for the Nest Hello Doorbell

August 18, 2020
Tech Tuesday

About a month ago I received a Technical Support email where someone wanted to know if the RIBU1C relay would be able to work with their Nest Hello doorbell system. Hmm. . . good question! I went off to my internet search engine of choice to find out more about the Nest Hello doorbell and if this combination could work.

After some internet and YouTube surfing, I concluded that it’s a pretty common application to have a Nest Hello doorbell along with a Chime Driver control the coil of a relay. The relay is used in any way needed to control power or signal to an existing chime or maybe a NuTone doorbell system via the relay contacts. Below is a generic wiring diagram that I made to visually convey how the RIBU1C would be used in this system:

What’s great about the RIBU1C is that the low voltage coil input is a range from 10-30 Volts. A lot of the people trying to find a relay for this application had to use an additional 24 Vac transformer somewhere because the Nest Hello used 16 Vac from an existing doorbell transformer and the added relay would likely have a 24 Vac coil. The RIBU1C coil is flexible and can take in the 16 Vac signal. No need for a new transformer!

The Blue, Yellow, and Orange wires provide access to the relay contacts. The contacts on the RIBU1C relay are rated to 10 Amps, are dry, and can be used in any way needed within the contact ratings listed in the datasheet. The above diagram is rough, and I do not know everything about the Nest Hello system, so be sure to follow Nest recommendations for wiring the Nest Hello.

As always, be sure to give us a call or send over an email if there are any technical questions about the RIBU1C relay or any of our other products!

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About the Author

Meet Samuel Klennert – you can call him Sam. He was born and raised amongst the farmland of Indiana, which included corn, soybeans, and sometimes wheat. Sam graduated from Purdue University with a Bachelors degree in Electrical and Computer Engineering Technology in 2015. He has a focus in analog circuitry and power electronics, but he’ll give software a try from time to time – just not that digital witchcraft!

Outside of work, Sam enjoys outdoor activities including (but not limited to) hiking, mountain biking (or just really-big-hill biking), and camping. Call Sam for tech support today – he’ll give his best effort to any task at hand!