EP 2428942 B1 20190116 - Hazard notification assembly with two data transfer speeds
Title (en)
Hazard notification assembly with two data transfer speeds
Title (de)
Gefahrenmeldeanlage mit zwei Datenübertragungsgeschwindigkeiten
Title (fr)
Installation d'alerte aux dangers dotée de deux vitesses de transmission de données
Publication
Application
Priority
DE 102010044892 A 20100909
Abstract (en)
[origin: EP2428942A1] The system has a control center e.g. sub-center, in which starting and ending points of a two-core field bus are connected. The field bus is fed through two line isolators (LT1, LT2) lying in a strand of the field bus. The isolators open the center in case of short-circuit or interruption in an area of the field bus or one of subscribers e.g. microphones, and close the center up to the other subscriber on both sides of a failure location. The former subscriber has a resistor (R1) and a capacitor (C) that are switched off during normal operation and switched on in case of failure. An independent claim is also included for a method for operating a security system.
IPC 8 full level
G08B 29/06 (2006.01)
CPC (source: EP)
G08B 25/045 (2013.01); G08B 29/06 (2013.01)
Citation (examination)
- DE 3012438 A1 19801016 - FUJI ELECTRIC CO LTD
- EP 2051220 A1 20090422 - SIEMENS BUILDING TECH AG [DE]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2428942 A1 20120314; EP 2428942 B1 20190116; DE 102010044892 A1 20120315
DOCDB simple family (application)
EP 11170397 A 20110617; DE 102010044892 A 20100909