Building technical management controller with a two-wire data and power transmission line
US5089974A · kind A · utility
141Cited by
14References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1989 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Nov 2, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A building power management controller comprises a plurality of modules connected by a two-wire network. Each module comprises a data transceiver device, controlled by a microprocessor to both transmit data to the other modules and to a central unit via the two-wire network, and to receive information via this two-wire network. The modules are supplied with power by the two-wire network. When two modules transmit simultaneously, one takes priority so as not to disturb the messages transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.