(19)
(11) EP 1 906 371 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.03.2010 Bulletin 2010/12

(43) Date of publication A2:
02.04.2008 Bulletin 2008/14

(21) Application number: 07394020.7

(22) Date of filing: 20.09.2007
(51) International Patent Classification (IPC): 
G08B 29/14(2006.01)
 G08B 25/04(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 28.09.2006 IE 20060706

(71) Applicant: E.I. Technology Limited
Shannon, County Clare (IE)

(72) Inventors:
  • Byrne, Michael
    Limerick (IE)
  • Flynn, Fergus
    Newmarket-on-Fergus, County Clare (IE)
  • Guinee, Michael
    Limerick (IE)
  • Duignan, James
    Limerick (IE)
  • Doyle, Ronan
    Shannon, County Clare (IE)

(74) Representative: Weldon, Michael James et al
John A. O'Brien & Associates Third Floor, Duncairn House, 14 Carysfort Avenue
Blackrock, Co. Dublin
Blackrock, Co. Dublin (IE)

   


(54) Control of alarm devices


(57) An alarm system comprises a plurality of alarm devices (10) interconnected by an interconnect wire (IC), and a remote control unit (1). The remote control unit (1) modulating remote control signals on an interconnect wire (IC) linking the alarm devices (10), and the alarm device control circuits (50) perform operations in response to said signals. The remote control unit (1) applies to the interconnect wire (IC) a higher voltage level than that of alarm device interconnect signals. A switch (3) causes the high-Voltage signal to be delivered on the interconnect wire (IC) by connecting the mains supply to the interconnect wire (IC) via a capacitor (C1, C2) and a diode (CR2). The alarm device control circuits (50) operate in response to a remote control signal to test or hush, the associated devices or to suppress low-battery beeps. Also, a remote control unit (1) switch (2) and a circuit (4) operate in response to a user input to short the interconnect wire (IC) to a low voltage, so that interconnect signalling of the alarm devices (10) is prevented and only a device sensing on alarm condition sounds.







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