Latching RIB relays from Functional Devices are identifiable by the "RIBL" in their model name. These relays are great because they mechanically latch themselves in their state. This means they're made to work with a pulse instead of a constant voltage. Furthermore, this saves power. If you lose power, your relay won't switch off. If this is something you need for your application, then latching relays are the way to go.
Our latching relays use a three-wire system made to work with controllers or a momentary contact switch. One wire is used for a latch signal, another wire for an unlatch signal, and the third wire is a shared by both signals. Applying a voltage pulse between the latch wire and the shared wire will close the relay contact and mechanically latch them. The contacts then won't unlatch until a similar voltage pulse is applied between the unlatch wire and the shared wire. This voltage pulse can be either 12Vac/dc or 24Vac/dc.
Here are a few examples:
There are also several variations of our latching relays. Model names with an "S" indicate that the relay has an override switch.
Models with an "M" indicate that the relay has an auxiliary contact for status feedback to a controller and an LED indicator.
We even have some with both an override switch and an auxiliary contact.
As always, if you have any questions or need help selecting the right relay, be sure to contact us. We are always happy to help! Our engineering staff can work with you to see if it's something we can add to our product line.
Functional Devices, Inc., located in the United States of America, has been designing and manufacturing quality electronic devices since 1969. Our mission is to enhance lives in buildings and beyond. We do so by designing and manufacturing reliable, high-quality products for the building automation industry. Our suite of product offerings include RIB relays, current sensors, power controls, power supplies, transformers, lighting controls, and more.
We test 100% of our products, which leads to less than 1 out of every 16,000 products experiencing a failure in the field.
Simply put, we provide users of our various products confidence and peace of mind in every box.