초록 ▼

An apparatus having a two wire system for providing both power and data communication between a master controller and at least one subcontroller. The master controller can also be connected through the conductors to submaster controllers which in turn have subcontrollers connected thereto. The maste

An apparatus having a two wire system for providing both power and data communication between a master controller and at least one subcontroller. The master controller can also be connected through the conductors to submaster controllers which in turn have subcontrollers connected thereto. The master controller is capable of addressing each of the submaster controllers and subcontrollers individually. A three voltage level system can be utilized to provide both power and addressing through the two conductors. Data transmitted by the subcontrollers can be analog and/or digital. A data entry device and an information display device can be connected to the master controller in the same manner as other subcontrollers.

대표청구항 ▼

A communication system comprising: master controller means for providing three different voltage levels including pulses of first and second voltage levels, the pulses of said first voltage level being power pulses; subcontroller means including at least one subcontroller adapted to store energy and

A communication system comprising: master controller means for providing three different voltage levels including pulses of first and second voltage levels, the pulses of said first voltage level being power pulses; subcontroller means including at least one subcontroller adapted to store energy and to selectively transmit information upon being powered by the energy stored thereby; first and second conductors extending between said master controller means and said subcontroller means and coupling said subcontroller means to said master controller means, said first and second conductors being normally disposed at the third voltage level; said master controller means providing pulses of said first voltage level to supply power along said first and second conductors to be received by said subcontroller means as energy stored therein and providing said second voltage level pulses to address said at least one subcontroller; and said at least one subcontroller transmitting information on said first and second conductors to said master controller means in response to receiving said second voltage level pulses therefrom.