Eaton Cooper RF9640 3 Way Synchronization?

[h0ckeysk8er (Bruce Pinsky)]

@JDRoberts

@Paul_Oliver

Eaton Z-Wave 3 way switching can be done in 2 ways.

First rule of home automation: the model number matters. The older model Eaton Cooper dimmers, such as the OP has, can only support RF 3 ways. Some of the newer models do allow the use of a physical traveler wire.

@Tom11 it is quite common for RF masters working with a traveler wire-connected accessory to only allow on/off at the accessory, not dimming. That’s because the on/off just requires a pulse to travel along the traveler wire, the physics are pretty simple. To allow dimming from the accessory you have to synchronize the level, which is much more complex. So most Z wave masters do that with Zwave association, not a physical wire connection. This is true for all brands.

I believe my GE/Jasco’s use a paddle switch with a traveler and I can dim from there or the dimmer switch.