Title:
TWO-WIRE SYSTEM ELECTRIC LOCK CONTROLLER
Document Type and Number:
Japanese Patent JPH08326373
Kind Code:
A
Abstract:
PURPOSE: To detect accurately a lock condition without being affected by wiring impedance even if the wiring length between an electric lock and controller body part is long.
CONSTITUTION: A no-voltage contact signal from a condition sensor of an electric lock 5 is converted to a frequency signal by an impedance-frequency converting means 13 provided in a double wire converter 12 to be sent onto double wire wiring so that the frequency signal is received by a frequency- voltage converting means 14 provided in a body part 11. Thus, a double wire system electric lock controller is obtained which can detect the condition of an electric lock with high workability and reliability without being affected by the impedance of two-wire wiring.
Inventors:
KUWAYAMA AIICHIRO
MURABAYASHI NOBUAKI
FUJIMURA YASUO
NAKAMURA SHINJI
MURABAYASHI NOBUAKI
FUJIMURA YASUO
NAKAMURA SHINJI
Application Number:
JP13342595A
Publication Date:
December 10, 1996
Filing Date:
May 31, 1995
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
E05B47/00; (IPC1-7): E05B47/00
Attorney, Agent or Firm:
Tomoyuki Takimoto (1 person outside)