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 RIB® 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 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 people trying to find a relay for this application had to use an additional 24 Vac transformer somewhere. The Nest Hello used 16 Vac from an existing doorbell transformer. 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. I do not know everything about the Nest Hello system. Be sure to follow Nest recommendations for wiring the Nest Hello.
Give us a call or send over an email if there are any technical questions about the RIBU1C relay.
Using RIB Relays in Building Automation Solutions
Integrating devices like the Nest Hello into building automation solutions often requires the flexibility to work with existing wiring and power limitations, and that’s where the RIBU1C shines. Its low-voltage coil input range and dry contact outputs make it easy to bridge the gap between modern smart devices and legacy chimes, doorbells, or notification systems within a building. This is the same flexibility that makes RIB relays a go-to tool for contractors and facility managers looking to expand building automation capabilities without overcomplicating installation.
When looking at control relays, the RIBU1C is a practical example of how relays can bring reliability and ease of integration to your projects. Whether you’re enabling alerts, controlling door strikes, or managing lighting tied to occupancy sensing, RIB relays help your building automation systems stay organized and efficient. It’s about having the right tools in place so your systems can grow smarter while keeping wiring simple and serviceable in the field.
Read More From Our Most Recent Articles:
Relays & Their Role in Smart Automation Control Systems
Benefits of Electronically Commutated Motors in Industrial Settings