Alarm system with analog devices
US7545264B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2006 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Sep 1, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B26/003
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Alarm system includes a controller, a single-wire loop connected to the controller, identification modules connected to the single-wire loop and attachments to or incorporated structures on or in the identification modules. Attachments or incorporated structures include digital and analog devices. Each identification module is programmed to provide a signal or report to the controller indicative of whether the associated device is in a normal state or in an alarm/trouble state. When analog devices are used, the identification modules may be designed not only to convert the analog readings to digital form but also to provide for a permitted range of variation in the sensor readings so that not all variations from a single, predetermined value of the condition being monitored by the sensor are considered indicative of a problem with the area being monitored by the sensor or a fault with the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.