Multiple location load control system
US9699863B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2015 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Oct 28, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/196
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multiple location load control system comprises a main device and remote devices, which do not require neutral connections, but allow for visual and audible feedback at the main device and the remote devices. The main device and the remote devices are adapted to be coupled together via an accessory wiring. The main device can be wired on the line side and the load side of the load control system. The main device is configured to enable a charging path to allow the remote devices to charge power supplies through the accessory wiring during a first time period of a half-cycle of the AC power source. The main device and the remote devices are configured to communicate with each other via the accessory wiring during a second time period of the half-cycle, for example, by actively pulling-up and actively pulling-down the accessory wiring to communicate using tri-state logic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.