Burglar alarm system having reduced wiring
First Claim
1. An alarm system comprising:
- an alarm controller, a remote input/output device, a cable extending from the alarm controller to the remote input/output device, the cable comprising two conductors providing power to the remote input/output device, and a signal processor at the controller monitoring and processing voltage and current fluctuations in the conductors and controlling functions of the alarm system.
2 Assignments
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Accused Products
Abstract
Normal hard-wired domestic burglar alarms have cables with six conductors extending between the alarm controller and each remote input/output device (such as an entry keypad). The present alarm system has an alarm controller, a remote input/output device, a cable extending from the alarm controller to the remote input/output device, the cable comprising two conductors only, providing power to the remote input/output device. A signal processor at the controller monitors and processes voltage and current in the conductors to affect functions of the alarm system. A mixer at the remote input/output device processes voltage and current in the conductors to affect functions of the alarm system.
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Citations
4 Claims
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1. An alarm system comprising:
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an alarm controller, a remote input/output device, a cable extending from the alarm controller to the remote input/output device, the cable comprising two conductors providing power to the remote input/output device, and a signal processor at the controller monitoring and processing voltage and current fluctuations in the conductors and controlling functions of the alarm system. - View Dependent Claims (2, 3, 4)
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Specification