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Title:
FIRE ALARM FACILITIES
Document Type and Number:
Japanese Patent JP2014013550
Kind Code:
A
Abstract:

To prevent occurrence of communication failure regardless of the size of scale of fire alarm facilities.

Fire alarm facilities comprise: a transmitting and receiving part 4 for supplying pulse voltage to a power supply combined signal line SG; a current value setting part 5 for setting, as a current limit value, an upper limit of current being output to the power supply combined signal line SG from the transmitting and receiving part 4 when the pulse voltage is output; and a current control part 6 for controlling the transmitting and receiving part 4 so that current equal to or lower than the current limit value set by the current value setting part 5 is output.


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JP5173778Prevention / security system
Inventors:
TAKAHASHI MASAKI
TSUBOKAWA KATSUHIDE
Application Number:
JP2012151519A
Publication Date:
January 23, 2014
Filing Date:
July 05, 2012
Export Citation:
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Assignee:
NOHMI BOSAI LTD
International Classes:
G08B17/00
Domestic Patent References:
JP2003281639A2003-10-03
JPH0262700A1990-03-02
JPH0991576A1997-04-04
JPH0962957A1997-03-07
JPH0944763A1997-02-14
JPH05290285A1993-11-05
JP2006048396A2006-02-16
JP2003281639A2003-10-03
JPH0262700A1990-03-02
JPH0991576A1997-04-04
JPH0962957A1997-03-07
JPS60142655A1985-07-27
JPS62173827A1987-07-30
Attorney, Agent or Firm:
Hisao Kobayashi
Kiyoshi Yasushima
Takanashi Norio
Motoki Shandong



 
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